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HT82K94E/HT82K94A
USB Multimedia Keyboard Encoder 8-Bit MCU
Technical Document
* Tools Information * FAQs * Application Note
Features
* Operating voltage: * HALT function and wake-up feature reduce power
fSYS=6M/12MHz: 2.2V~5.5V
* 40 bidirectional I/O lines (max.) * 8-bit programmable timer/event counter with over-
consumption
* 8-level subroutine nesting * Up to 0.33ms instruction cycle with 12MHz system
flow interrupt (shared with PD4, vector 08H)
* 16-bit programmable timer/event counter and over-
clock at VDD=5V
* Bit manipulation instruction * 16-bit table read instruction * 63 powerful instructions * All instructions in one or two machine cycles * Optional 3-battery mode 2.4V LVR/2.6V LVD (0.1V)
flow interrupts (shared with PA7, vector 0CH)
* Crystal oscillator (6MHz or 12MHz) * Watchdog Timer * PS2 and USB modes supported * USB1.1 low speed function * 4 endpoints supported (endpoint 0 included) * 614416 program memory ROM * 2248 data memory RAM * One external interrupt input (shared with PA4 vector
by option, Low battery detector with internal bit
* Optional 2-battery mode 2.2V LVR/2.4V LVD (0.1V)
by option, Low battery detector with internal bit
* Operating voltage from 4.0V to 5.5V (For Connect
USB/PS2 Mode)
* Operating voltage from 2.2V to 3.3V (For Pure Cal.
04H)
* One internal USB interrupt (vector 04H) * All I/O ports support wake-up options
Mode)
* 40-pin DIP, 48-pin SSOP package
General Description
This device is an 8-bit high performance RISC architecture microcontroller designed for USB product applications. It is particularly suitable for use in products such as keyboards and keyboard with calculator. A HALT feature is included to reduce power consumption. The mask version HT82K94A is fully pin and functionally compatible with the OTP version HT82K94E device. HT82K94A under development, available in 2Q, 2006.
Rev. 1.00
1
November 22, 2005
HT82K94E/HT82K94A
Block Diagram
P A 4 /E X T U S B D + /C L K U S B D -/D A T A V33O TM R1C M U X TM R1 fS
YS
U S B 1 .1 PS2 BP In te rru p t C ir c u it STACK P ro g ra m ROM P ro g ra m C o u n te r IN T C
/4
P A 7 /T M R 1
TM R0 TM R0C
M U
fS X
YS
/4
P D 4 /T M R 0
E N /D IS W DTS In s tr u c tio n R e g is te r MP M U X DATA M e m o ry W D T P r e s c a le r WDT M U X S Y S C L K /4 W DT OSC
PAC PA In s tr u c tio n D ecoder ALU T im in g G e n e ra to r S h ifte r MUX PBC PB STATUS PCC PC PDC OSC2 OS R V V C1 ES DD SS ACC PD PEC PE
PORT A
PA0 PA4 PA5 PA7
~P /E ~P /T
A3 XT A6 MR1
PORT B
PB0~PB7
PORT C
PC0~PC7 PD 0~PD 3 P D 4 /T M R 0 PD 5~PD 7 PE0~PE7
PORT D
PORT E
Rev. 1.00
2
November 22, 2005
HT82K94E/HT82K94A
Pin Assignment
PC5 PC4 PA3 PA2 PC5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 PC4 PA3 PA2 PA1 PA0 PC0 PC1 PC2 PC3 P D 4 /T M R 0 PD5 PD6 PD7 VDD V33O U S B D + /C L K U S B D -/D A T A PB0 PB1 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 PC6 PC7 P A 4 /E X T PA5 PA6 P A 7 /T M R 1 PD3 PD3 PD1 PD0 OSC1 OSC2 RES VSS PB7 PB6 PB5 PB4 PB3 PB2 PA1 PA0 PC0 PC1 PC2 PC3 PE0 PE1 PE2 PE3 P D 4 /T M R 0 PD5 PD6 PD7 VDD V33O U S B D + /C L K U S B D -/D A T A PB0 PB1 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 8 7 6 5 4 3 2 1 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 PC6 PC7 P A 4 /E X T PA5 PA6 P A 7 /T M R 1 PE7 PE6 PE5 PE4 PD3 PD2 PD1 PD0 OSC1 OSC2 RES VSS PB7 PB6 PB5 PB4 PB3 PB2
H T 8 2 K 9 4 E /H T 8 2 K 9 4 A 4 0 D IP -A
H T 8 2 K 9 4 E /H T 8 2 K 9 4 A 4 8 S S O P -A
Pin Description
Pin Name I/O ROM Code Option Description
PA0~PA3 PA4/EXT PA5~PA6 PA7/TMR1
Bidirectional 8-bit input/output port. Each bit can be configured as a wake-up input by ROM code option. The input or output mode is controlled by PAC (PA control register). Pull-high Pull-high resistor options: PA0~PA7 I/O Wake-up CMOS/NMOS/PMOS CMOS/NMOS/PMOS options: PA0~PA7 Wake-up options: PA0~PA7 PA4 and PA7 are pin-shared with EXT and TMR1 input, respectively. Pull-high Wake-up Bidirectional 8-bit input/output port. Software instructions determine the CMOS output or Schmitt trigger input with pull-high resistor (determined by pull-high options). Wake-up options: PB0~PB7 Bidirectional I/O lines. Software instructions determine the CMOS output or Schmitt trigger input with pull-high resistor (determined by pull-high options). Wake-up options: PC0~PC7 Bidirectional I/O lines. Software instructions determine the CMOS output or Schmitt trigger input with pull-high resistor (determined by pull-high options). Wake-up options: PD0~PD7 PD4 is pin-shared with TMR0 input. Bidirectional I/O lines. Software instructions determine the CMOS output or Schmitt trigger input with pull-high resistor (determined by pull-high options). Wake-up options: PE0~PE7
PB0~PB7
I/O
PC0~PC7
I/O
Pull-high Wake-up
PD0~PD3 PD4/TMR0 PD5~PD7
I/O
Pull-high Wake-up
PE0~PE7
I/O
Pull-high Wake-up
Rev. 1.00
3
November 22, 2005
HT82K94E/HT82K94A
Pin Name VSS RES VDD V33O USBD+/CLK USBD-/DATA OSC1 OSC2 I/O 3/4 I 3/4 O I/O I/O I O ROM Code Option 3/4 3/4 3/4 3/4 3/4 3/4 3/4 Description Negative power supply, ground Schmitt trigger reset input. Active low Positive power supply 3.3V regulator output USBD+ or PS2 CLK I/O line USB or PS2 function is controlled by software control register USBD- or PS2 DATA I/O line USB or PS2 function is controlled by software control register OSC1, OSC2 are connected to a 6MHz or 12MHz Crystal/resonator (determined by software instructions) for the internal system clock.
Absolute Maximum Ratings
Supply Voltage ...........................VSS-0.3V to VSS+6.0V Input Voltage..............................VSS-0.3V to VDD+0.3V Storage Temperature ............................-50C to 125C Operating Temperature...............................0C to 70C
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
D.C. Characteristics
Symbol Parameter Test Conditions VDD 3/4 3/4 5V 5V 5V 5V 5V 5V 5V 5V 5V Conditions fSYS=6MHz fSYS=12MHz No load, fSYS=6MHz No load, fSYS=12MHz No load, system HALT, USB suspend No load, system HALT, USB suspend No load, system HALT, I/O mode TTL level TTL level CMOS level CMOS level VOL=3.4V VOL=0.4V VOL=0.4V Min. 2.2 2.2 3/4 3/4 3/4 3/4 3/4 0 2 0 0.9VDD 10 2 7 Typ. 3/4 3/4 6.5 7.5 3/4 3/4 3/4 3/4 3/4 3/4 3/4 15 4 10 Max. 5.5 5.5 12 16 250 230 15 0.8 5 0.4VDD VDD 20 8 13
Ta=25C Unit V V mA mA mA mA mA V V V V mA mA mA
VDD IDD1 IDD2 ISTB1 ISTB2 ISTB3 VIL1 VIH1 VIL2 VIH2 IOL1 IOL2 IOL3
Operating Voltage Operating Current (6MHz Crystal) Operating Current (12MHz Crystal) Standby Current (WDT Enabled) Standby Current (WDT Disabled) Standby Current (WDT Enabled) Input Low Voltage for I/O Ports Input High Voltage for I/O Ports Input Low Voltage (RES) Input High Voltage (RES)
I/O Port Sink Current for PA1~PA7, PB, 5V PC, PD I/O Port Sink Current for PA1~PA7, PB, 5V PC, PD I/O Port Sink Current for PA0 5V
Rev. 1.00
4
November 22, 2005
HT82K94E/HT82K94A
Symbol IOH1 IOH2 RPH VLVR Parameter Test Conditions VDD Conditions VOH=3.4V VOH=3.4V 3/4 2-battery option 3-battery option 2-battery option 3-battery option IV33O=-5mA Min. -2 -12 25 2.1 2.3 2.3 2.5 3.0 Typ. -4 -18 50 2.2 2.4 2.4 2.6 3.3 Max. -8 -24 80 2.3 V 2.5 2.5 V 2.7 3.6 V Unit
I/O Port Source Current for PA1~PA7, 5V PB, PC, PD I/O Port Source Current for PA0 5V
mA mA kW
Pull-high Resistance for PA, PB, PC, PD 5V Low Voltage Reset 3/4
VLVD VV33O
Low Battery Detecting Voltage 3.3V Regulator Output
3/4 5V
A.C. Characteristics
Symbol fSYS fTIMER Parameter System Clock (Crystal OSC) Timer I/P Frequency (TMR) Test Conditions VDD 5V 5V 5V Conditions 3/4 3/4 3/4 Without WDT prescaler Without WDT prescaler 3/4 Wake-up from HALT tSST System Start-up Timer Period 3/4 3/4 Power-up, Watchdog Time-out from normal 3/4 Min. 6 0 15 4 3/4 1 3/4 3/4 1 Typ. 3/4 3/4 31 8 1024 3/4 1024 1024 3/4 Max. 12 12 70 16 3/4 3/4 3/4 3/4 3/4
Ta=25C Unit MHz MHz ms ms tSYS ms tSYS tWDTOSC ms
tWDTOSC Watchdog Oscillator tWDT1 tWDT2 tRES
Watchdog Time-out Period (WDT OSC) 5V Watchdog Time-out Period (System Clock) External Reset Low Pulse Width 3/4 3/4
tINT
Interrupt Pulse Width
Rev. 1.00
5
November 22, 2005
HT82K94E/HT82K94A
Functional Description
Execution Flow The system clock for the microcontroller is derived from a crystal (6 or 12MHz). The system clock is internally divided into four non-overlapping clocks. One instruction cycle consists of four system clock cycles. Instruction fetching and execution are pipelined in such a way that a fetch takes an instruction cycle while decoding and execution takes the next instruction cycle. However, the pipelining scheme allows each instruction to be effectively executed in a cycle. If an instruction changes the program counter, two cycles are required to complete the instruction. Program Counter - PC The program counter (PC) controls the sequence in which the instructions stored in the program ROM are executed and its contents specify a full range of program memory. After accessing a program memory word to fetch an instruction code, the contents of the program counter are
T1 T2 T3 T4 T1 T2
incremented by one. The program counter then points to the memory word containing the next instruction code. When executing a jump instruction, conditional skip execution, loading PCL register, subroutine call or return from subroutine, initial reset, internal interrupt, external interrupt or return from interrupts, the PC manipulates the program transfer by loading the address corresponding to each instruction. The conditional skip is activated by instructions. Once the condition is met, the next instruction, fetched during the current instruction execution, is discarded and a dummy cycle replaces it to get the proper instruction. Otherwise proceed to the next instruction. The lower byte of the program counter (PCL) is a readable and writeable register (06H). Moving data into the PCL performs a short jump. The destination will be within the current program ROM page. When a control transfer takes place, an additional dummy cycle is required.
S y s te m
C lo c k
T3
T4
T1
T2
T3
T4
O S C 2 ( R C o n ly ) PC PC PC+1 PC+2
F e tc h IN S T (P C ) E x e c u te IN S T (P C -1 )
F e tc h IN S T (P C + 1 ) E x e c u te IN S T (P C )
F e tc h IN S T (P C + 2 ) E x e c u te IN S T (P C + 1 )
Execution Flow
Mode Initial Reset External Interrupt Timer/Event Counter 0 Overflow Timer/Event Counter 1 Overflow Skip Loading PCL Jump, Call Branch Return from Subroutine
Program Counter *12 0 0 0 0 *11 0 0 0 0 *10 0 0 0 0 *9 0 0 0 0 *8 0 0 0 0 *7 0 0 0 0 *6 0 0 0 0 *5 0 0 0 0 *4 0 0 0 0 *3 0 0 1 1 *2 0 1 0 1 *1 0 0 0 0 *0 0 0 0 0
Program Counter+2 *12 #12 S12 *11 #11 S11 *10 #10 S10 *9 #9 S9 *8 #8 S8 @7 #7 S7 @6 #6 S6 @5 #5 S5 @4 #4 S4 @3 #3 S3 @2 #2 S2 @1 #1 S1 @0 #0 S0
Program Counter Note: *12~*0: Program counter bits #12~#0: Instruction code bits S12~S0: Stack register bits @7~@0: PCL bits
Rev. 1.00
6
November 22, 2005
HT82K94E/HT82K94A
Program Memory - ROM The program memory is used to store the program instructions which are to be executed. It also contains data, table, and interrupt entries, and is organized into 409615 bits, addressed by the program counter and table pointer. Certain locations in the program memory are reserved for special usage:
* Location 000H * Location 00CH
This location is reserved for the Timer/Event Counter 1 interrupt service program. If a timer interrupt results from a Timer/Event Counter 1 overflow, and the interrupt is enabled and the stack is not full, the program begins execution at location 00CH.
* Table location
This area is reserved for program initialization. After chip reset, the program always begins execution at location 000H.
* Location 004H
Any location in the program memory can be used as look-up tables. There are three method to read the ROM data by two table read instructions: TABRDC and TABRDL, transfer the contents of the lower-order byte to the specified data memory, and the higher-order byte to TBLH (08H). The three methods are shown as follows:
This area is reserved for the USB and external interrupt service program. If the USB interrupt or PA4/EXT is activated, the interrupt is enabled and the stack is not full, the program begins execution at location 004H. There are EXTIF bit in register USR to indicate the external interrupt is activated.
* Location 008H
The instructions TABRDC [m] (the current page, one page=256words), where the table locations is defined by TBLP (07H) in the current page. And the ROM code option TBHP is disabled (default). The instructions TABRDC [m], where the table locations is defined by registers TBLP (07H) and TBHP (01FH). And the ROM code option TBHP is enabled. The instructions TABRDL [m], where the table locations is defined by Registers TBLP (07H) in the last page (1700H~17FFH).
This area is reserved for the Timer/Event Counter 0 interrupt service program. If a timer interrupt results from a Timer/Event Counter 0 overflow, and if the interrupt is enabled and the stack is not full, the program begins execution at location 008H.
000H 004H 008H 00CH D e v ic e In itia liz a tio n P r o g r a m U S B & E X T In te r r u p t S u b r o u tin e T im e r /E v e n t C o u n te r 0 In te r r u p t S u b r o u tin e T im e r /E v e n t C o u n te r 1 In te r r u p t S u b r o u tin e P ro g ra m M e m o ry L o o k - u p T a b le ( 2 5 6 w o r d s )
n00H nFFH
1700H 17FFH
L o o k - u p T a b le ( 2 5 6 w o r d s ) 1 6 b its N o te : n ra n g e s fro m 0 to F
Only the destination of the lower-order byte in the table is well-defined, the other bits of the table word are transferred to the lower portion of TBLH, and the remaining 1-bit words are read as 0. The Table Higher-order byte register (TBLH) is read only. The table pointer (TBLP, TBHP) is a read/write register (07H, 1FH), which indicates the table location. Before accessing the table, the location must be placed in the TBLP and TBHP (If the OTP option TBHP is disabled, the value in TBHP has no effect). The TBLH is read only and cannot be restored. If the main routine and the ISR (Interrupt Service Routine) both employ the table read instruction, the contents of the TBLH in the main routine are likely to be changed by the table read instruction used in the ISR. Errors can occur. In other words, using the table read instruction in the main routine and the ISR simultaneously should be avoided. However, if the table read instruction has to be applied in both the main routine and the ISR, the interrupt should be disabled prior to the table read instruction.
Program Memory Table Location *12 P12 1 *11 P11 1 *10 P10 1 *9 P9 1 *8 P8 1 *7 @7 @7 *6 @6 @6 *5 @5 @5 *4 @4 @4 *3 @3 @3 *2 @2 @2 *1 @1 @1 *0 @0 @0
Instruction TABRDC [m] TABRDL [m]
Table Location Note: *12~*0: Table location bits @7~@0: Table pointer bits P12~P8: Current program counter bits when TBHP is disabled TBHP register bit3~bit0 when TBHP is enabled
Rev. 1.00
7
November 22, 2005
HT82K94E/HT82K94A
It will not be enabled until the TBLH has been backed up. All table related instructions require two cycles to complete the operation. These areas may function as normal program memory depending on the requirements. Once TBHP is enabled, the instruction TABRDC [m] reads the ROM data as defined by TBLP and TBHP value. Otherwise, the ROM code option TBHP is disabled, the instruction TABRDC [m] reads the ROM data as defined by TBLP and the current program counter bits. Stack Register - STACK This is a special part of the memory which is used to save the contents of the program counter only. The stack is organized into 8 levels and is neither part of the data nor part of the program space, and is neither readable nor writeable. The activated level is indexed by the stack pointer (SP) and is neither readable nor writeable. At a subroutine call or interrupt acknowledge signal, the contents of the program counter are pushed onto the stack. At the end of a subroutine or an interrupt routine, signaled by a return instruction (RET or RETI), the program counter is restored to its previous value from the stack. After a chip reset, the SP will point to the top of the stack. If the stack is full and a non-masked interrupt takes place, the interrupt request flag will be recorded but the acknowledge signal will be inhibited. When the stack pointer is decremented (by RET or RETI), the interrupt will be serviced. This feature prevents stack overflow allowing the programmer to use the structure more easily. In a similar case, if the stack is full and a CALL is subsequently executed, stack overflow occurs and the first entry will be lost (only the most recent 8 return addresses are stored). Data Memory - RAM for Bank 0 The data memory is designed with 2558 bits. The data memory is divided into two functional groups: special function registers and general purpose data memory (2248). Most are read/write, but some are read only. The special function registers include the indirect addressing registers (R0;00H, R1;02H), Bank register (BP, 04H), Timer/Event Counter 0 (TMR0;0DH), Timer/Event Counter 0 control register (TMR0C;0EH), Timer/Event Counter 1 higher order byte register (TMR1H;0FH), Timer/Event Counter 1 lower order byte register (TMR1L;10H), Timer/Event Counter 1 control register (TMR1C;11H), program counter lower-order byte register (PCL;06H), memory pointer registers (MP0;01H, MP1;03H), accumulator (ACC;05H), table pointer (TBLP;07H, TBHP;1FH), table higher-order byte register (TBLH;08H), status register
Bank 0 00H 01H 02H 03H 04H 05H 06H 07H 08H 09H 0AH 0BH 0CH 0DH 0EH 0FH 10H 11H 12H 13H 14H 15H 16H 17H 18H 19H 1AH 1BH 1CH 1DH 1EH 1FH 20H TM R0 TM R0C TM R1H TM R1L TM R1C PA PAC PB PBC PC PCC PD PDC PE PEC USC USR SCC TBHP S p e c ia l P u r p o s e DATA M EM ORY In d ir e c t A d d r e s s in g R e g is te r 0 MP0 In d ir e c t A d d r e s s in g R e g is te r 1 MP1 BP ACC PCL TBLP TBLH W DTS STATUS IN T C
G e n e ra l P u rp o s e DATA M EM ORY (2 2 4 B y te s ) FFH
:U nused R e a d a s "0 0 "
Bank 0 RAM Mapping (STATUS;0AH), interrupt control register (INTC;0BH), Watchdog Timer option setting register (WDTS;09H), I/O registers (PA;12H, PB;14H, PC;16H, PD;18H, PE;1AH), I/O control registers (PAC;13H, PBC;15H, PCC;17H, PDC;19H, PEC;1BH). USB/PS2 status and control register (USC;1CH), USB endpoint interrupt status register (USR;1DH), system clock control register (SCC;1EH). The general purpose data memory, addressed from 20H to FFH, is used for data and control information under instruction commands. All of the data memory areas can handle arithmetic, logic, increment, decrement and rotate operations directly. Except for some dedicated bits, each bit in the data memory can be set and reset by SET [m].i and CLR [m].i. They are also indirectly accessible through memory pointer registers (MP0 or MP1).
Rev. 1.00
8
November 22, 2005
HT82K94E/HT82K94A
Data Memory - RAM for Bank 1 The special function registers used in USB interface are located in RAM bank 1. In order to access the Bank1 register, only the Indirect addressing pointer MP1 can be used and the Bank register BP should be set to 1. The mapping of RAM bank 1 is as shown. Indirect Addressing Register Location 00H and 02H are indirect addressing registers that are not physically implemented. Any read/write operation of [00H] ([02H]) will access data memory pointed to by MP0 (MP1). Reading location 00H (02H) itself indirectly will return the result 00H. Writing indirectly results in no operation. The indirect addressing pointer (MP0) always point to Bank0 RAM addresses regardless of the value of the Bank Register (BP). The indirect addressing pointer (MP1) can access Bank0 or Bank1 RAM data according to the value of BP which is set to 0 or 1 respectively. The memory pointer registers (MP0 and MP1) are 8-bit registers.
40H 41H 42H 43H 44H 45H 46H 47H 48H 49H 4AH 4BH 4CH FFH P IP E _ C T R L AW R STALL P IP E S IE S M IS C E n d p t_ E N F IF O 0 F IF O 1 F IF O 2 F IF O 3 U n d e fin e d , r e s e r v e d fo r fu tu r e e x p a n s io n
Accumulator The accumulator is closely related to ALU operations. It is also mapped to location 05H of the data memory and can carry out immediate data operations. The data movement between two data memory locations must pass through the accumulator. Arithmetic and Logic Unit - ALU This circuit performs 8-bit arithmetic and logic operations. The ALU provides the following functions:
* Arithmetic operations (ADD, ADC, SUB, SBC, DAA) * Logic operations (AND, OR, XOR, CPL) * Rotation (RL, RR, RLC, RRC) * Increment and Decrement (INC, DEC) * Branch decision (SZ, SNZ, SIZ, SDZ)
The ALU not only saves the results of a data operation but also changes the status register. Status Register - STATUS This 8-bit register (0AH) contains the zero flag (Z), carry flag (C), auxiliary carry flag (AC), overflow flag (OV), power down flag (PDF), and watchdog time-out flag (TO). It also records the status information and controls the operation sequence. With the exception of the TO and PDF flags, bits in the status register can be altered by instructions like most other registers. Any data written into the status register will not change the TO or PDF flag. In addition operations related to the status register may give different results from those intended. The TO flag can be affected only by system power-up, a WDT time-out or executing the CLR WDT or HALT instruction. The PDF flag can be affected only by executing the HALT or CLR WDT instruction or during a system power-up. The Z, OV, AC and C flags generally reflect the status of the latest operations. Function
Bank 1 RAM Mapping Bit No. 0 Label C
C is set if an operation results in a carry during an addition operation or if a borrow does not take place during a subtraction operation; otherwise C is cleared. C is also affected by a rotate through carry instruction. AC is set if an operation results in a carry out of the low nibbles in addition or no borrow from the high nibble into the low nibble in subtraction; otherwise AC is cleared. Z is set if the result of an arithmetic or logic operation is zero; otherwise Z is cleared. OV is set if the operation results in a carry into the highest-order bit but not a carry out of the highest-order bit, or vice versa; otherwise OV is cleared. PDF is cleared by system power-up or executing the CLR WDT instruction. PDF is set by executing the HALT instruction. TO is cleared by system power-up or executing the CLR WDT or HALT instruction. TO is set by a WDT time-out. Unused bit, read as 0 Status (0AH) Register
1 2 3 4 5 6~7
AC Z OV PDF TO 3/4
Rev. 1.00
9
November 22, 2005
HT82K94E/HT82K94A
In addition, on entering the interrupt sequence or executing the subroutine call, the status register will not be pushed onto the stack automatically. If the contents of the status are important and if the subroutine can corrupt the status register, precautions must be taken to save it properly. Interrupt The device provides an external interrupt and internal timer/event counter and USB interrupts. The Interrupt Control Register (INTC;0BH) contains the interrupt control bits to set the enable/disable and the interrupt request flags. Once an interrupt subroutine is serviced, all the other interrupts will be blocked (by clearing the EMI bit). This scheme may prevent any further interrupt nesting. Other interrupt requests may occur during this interval but only the interrupt request flag is recorded. If a certain interrupt requires servicing within the service routine, the EMI bit and the corresponding bit of the INTC may be set to allow interrupt nesting. If the stack is full, the interrupt request will not be acknowledged, even if the related interrupt is enabled, until the SP is decremented. If immediate service is desired, the stack must be prevented from becoming full. All these kinds of interrupts except external interrupt PA4/EXT have a wake-up capability. As an interrupt is serviced, a control transfer occurs by pushing the program counter onto the stack, followed by a branch to a subroutine at specified location in the program memory. Only the program counter is pushed onto the stack. If the contents of the register or status register (STATUS) are altered by the interrupt service program which corrupts the desired control sequence, the contents should be saved in advance. The external and USB interrupt use the same vector location (04H). There are EXTIF bit in USR register to indicate whether this interrupt is external interrupt or not. Also bit EXT-INTEN in SCC register is configured the external interrupt is enable or disable. USB interrupts are triggered by the following USB Bit No. 0 1 2 3 4 5 6 7 Label EMI EUI ET0I ET1I USBF T0F T1F 3/4 events and the related interrupt request flag (USBF; bit 4 of the INTC) will be set.
* The corresponding USB FIFO is accessed from the
PC
* The USB suspends signal from the PC * The USB resumes signal from the PC * The USB sends Reset signal
When the interrupt is enabled, the stack is not full and the external interrupt is active, a subroutine call to location 04H will occur. The interrupt request flag (USBF) and EMI bits will be cleared to disable other interrupts. When the PC Host access the FIFO of the HT82K94E/ HT82K94A, the corresponding request bit of the USR is set, and a USB interrupt is triggered. So user can easily decide which FIFO is accessed. When the interrupt has been served, the corresponding bit should be cleared by firmware. When the HT82K94E/HT82K94A receives a USB Suspend signal from the Host PC, the suspend line (bit0 of the USC) of the HT82K94E/HT82K94A is set and a USB interrupt is also triggered. Also when the HT82K94E/HT82K94A receives a Resume signal from the Host PC, the resume line (bit3 of the USC) of HT82K94E/HT82K94A is set and a USB interrupt is triggered. Whenever a USB reset signal is detected, the USB interrupt is triggered. The internal Timer/Event Counter 0 interrupt is initialized by setting the Timer/Event Counter 0 interrupt request flag (; bit 5 of INTC), caused by a timer 0 overflow. When the interrupt is enabled, the stack is not full and the T0F bit is set, a subroutine call to location 08H will occur. The related interrupt request flag (T0F) will be reset and the EMI bit cleared to disable further interrupts. The internal Timer/Even Counter 1 interrupt is initialized by setting the Timer/Event Counter 1 interrupt request flag (;bit 6 of INTC), caused by a timer 1 overflow. When the interrupt is enabled, the stack is not full and the T1F is set, a subroutine call to location 0CH will occur. The related interrupt request flag (T1F) will be reset and the EMI bit cleared to disable further interrupts. Function
Controls the master (global) interrupt (1= enabled; 0= disabled) Controls the USB interrupt (1= enabled; 0= disabled) Controls the Timer/Event Counter 0 interrupt (1= enabled; 0= disabled) Controls the Timer/Event Counter 1 interrupt (1= enabled; 0= disabled) USB interrupt request flag (1= active; 0= inactive) Internal Timer/Event Counter 0 request flag (1= active; 0= inactive) Internal Timer/Event Counter 1 request flag (1= active; 0= inactive) Unused bit, read as 0 INTC (0BH) Register
Rev. 1.00
10
November 22, 2005
HT82K94E/HT82K94A
During the execution of an interrupt subroutine, other interrupt acknowledge signals are held until the RETI instruction is executed or the EMI bit and the related interrupt control bit are set to 1 (if the stack is not full). To return from the interrupt subroutine, RET or RETI may be invoked. RETI will set the EMI bit to enable an interrupt service, but RET will not. Interrupts, occurring in the interval between the rising edges of two consecutive T2 pulses, will be serviced on the latter of the two T2 pulses, if the corresponding interrupts are enabled. In the case of simultaneous requests the following table shows the priority that is applied. These can be masked by resetting the EMIbit. No. a b c Interrupt Source USB interrupt Timer/Event Counter 0 overflow Timer/Event Counter 1 overflow Priority Vector 1 2 3 04H 08H 0CH This oscillator is designed for system clocks. The HALT mode stops the system oscillator and ignores an external signal to conserve power. A crystal across OSC1 and OSC2 is needed to provide the feedback and phase shift required for the oscillator. No other external components are required. In stead of a crystal, a resonator can also be connected between OSC1 and OSC2 to get a frequency reference, but two external capacitors in OSC1 and OSC2 are required. The WDT oscillator is a free running on-chip RC oscillator, and no external components are required. Even if the system enters the power down mode, the system clock is stopped, but the WDT oscillator still works within a period of approximately 31ms. The WDT oscillator can be disabled by ROM code option to conserve power. Watchdog Timer - WDT The WDT clock source is implemented by a dedicated RC oscillator (WDT oscillator), or instruction clock (system clock divided by 4), determines the ROM code option. This timer is designed to prevent a software malfunction or sequence from jumping to an unknown location with unpredictable results. The Watchdog Timer can be disabled by ROM code option. If the Watchdog Timer is disabled, all the executions related to the WDT result in no operation. Once the internal WDT oscillator (RC oscillator, normally with a period of 31ms/5V) is selected, it is first divided by 256 (8-stage) to get the nominal time-out period of 8ms/5V. This time-out period may vary with temperatures, VDD and process variations. By invoking the WDT prescaler, longer time-out periods can be realized. Writing data to WS2, WS1, WS0 (bits 2, 1, 0 of the WDTS) can give different time-out periods. If WS2, WS1, and WS0 are all equal to 1, the division ratio is up to 1:128, and the maximum time-out period is 1s/5V. If the WDT oscillator is disabled, the WDT clock may still come from the instruction clock and operates in the same manner except that in the HALT state the WDT may stop counting and lose its protecting purpose. In this situation the logic can only be restarted by external logic. The high nibble and bit 3 of the WDTS are reserved for users defined flags, which can only be set to 10000 (WDTS.7~WDTS.3).
The Timer/Event Counter 0/1 interrupt request flag (T0F/T1F), USB interrupt request flag (USBF), enable Timer/Event Counter 0/1 interrupt bit (ET0I/ET1I), enable USB interrupt bit (EUI) and enable master interrupt bit (EMI) constitute an interrupt control register (INTC) which is located at 0BH in the data memory. EMI, EUI, ETI are used to control the enabling/disabling of interrupts. These bits prevent the requested interrupt from being serviced. Once the interrupt request flags (TF, USBF) are set, they will remain in the INTC register until the interrupts are serviced or cleared by a software instruction. It is recommended that a program does not use the CALL subroutine within the interrupt subroutine. Interrupts often occur in an unpredictable manner or need to be serviced immediately in some applications. If only one stack is left and enabling the interrupt is not well controlled, the original control sequence will be damaged once the CALL operates in the interrupt subroutine. Oscillator Configuration There is an oscillator circuits in the microcontroller.
OSC1
OSC2 C r y s ta l O s c illa to r
System Oscillator
S y s te m C lo c k /4
W DT OSC ROM Code O p tio n S e le c t W D T P r e s c a le r 8 - b it C o u n te r 7 - b it C o u n te r
8 -to -1 M U X W D T T im e - o u t
W S0~W S2
Watchdog Timer
Rev. 1.00
11
November 22, 2005
HT82K94E/HT82K94A
If the device operates in a noisy environment, using the on-chip 32kHz RC oscillator (WDT OSC) is strongly recommended, since the HALT will stop the system clock. WS2 0 0 0 0 1 1 1 1 WS1 0 0 1 1 0 0 1 1 WS0 0 1 0 1 0 1 0 1 Division Ratio 1:1 1:2 1:4 1:8 1:16 1:32 1:64 1:128 cleared by a system power-up or executing the CLR WDT instruction and is set when executing the HALT instruction. The TO flag is set if the WDT time-out occurs, and causes a wake-up that only resets the Program Counter and SP, the others remain in their original status. The I/O ports wake-up and interrupt methods can be considered as a continuation of normal execution. Each bit in the Port A can be independently selected to wake-up the device by option. PB, PC and PD can also be selected to wake-up the device by option. Upon awakening from an I/O port stimulus, the program will resume execution of the next instruction. If it awakens from an interrupt, two sequence may occur. If the related interrupt is disabled or the interrupt is enabled but the stack is full, the program will resume execution at the next instruction. If the interrupt is enabled and the stack is not full, the regular interrupt response takes place. If an interrupt request flag is set to 1 before entering the HALT mode, the wake-up function of the related interrupt will be disabled. Once a wake-up event occurs, it takes 1024 tSYS (system clock period) to resume normal operation. In other words, a dummy period will be inserted after a wake-up. If the wake-up results from an interrupt acknowledge signal, the actual interrupt subroutine execution will be delayed by one or more cycles. If the wake-up results in the next instruction execution, this will be executed immediately after the dummy period is completed. To minimize power consumption, all the I/O pins should be carefully managed before entering the HALT status. Reset There are three ways in which a reset can occur:
* RES reset during normal operation * RES reset during HALT * WDT time-out reset during normal operation
WDTS (09H) Register The WDT overflow under normal operation will initialize a chip reset and set the status bit TO. But in the HALT mode, the overflow will initialize a warm reset and only the Program Counter and SP are reset to zero. To clear the contents of the WDT (including the WDT prescaler), three methods are employed; external reset (a low level to RES), software instruction and a HALT instruction. The software instruction include CLR WDT and the other set - CLR WDT1 and CLR WDT2. Of these two types of instruction, only one can be active depending on the ROM code option - CLR WDT times selection option. If the CLR WDT is selected (i.e. CLRWDT times equal one), any execution of the CLR WDT instruction will clear the WDT. In the case wherein CLR WDT1 and CLR WDT2 are chosen (i.e. CLRWDT times is equal to two), these two instructions must be executed to clear the WDT, otherwise, the WDT may reset the chip as a result of time-out. Power Down Operation - HALT The HALT mode is initialized by the HALT instruction and results in the following:
* The system oscillator will be turned off but the WDT
oscillator remains running (if the WDT oscillator is selected). * The contents of the on-chip RAM and registers remain unchanged.
* WDT and WDT prescaler will be cleared and re-
counted again (if the WDT clock is from the WDT oscillator).
* All of the I/O ports maintain their original status. * The PDF flag is set and the TO flag is cleared.
The WDT time-out during HALT is different from other chip reset conditions, since it can perform a warm re set that resets only the Program Counter and SP, leaving the other circuits in their original state. Some registers remain unchanged during other reset conditions. Most registers are reset to the initial condition when the reset conditions are met. By examining the PDF and TO flags, the program can distinguish between different chip resets. TO PDF 0 u 0 1 1 0 u 1 u 1 RESET Conditions RES reset during power-up RES reset during normal operation RES wake-up HALT WDT time-out during normal operation WDT wake-up HALT
The system can leave the HALT mode by means of an external reset, an interrupt except external interrupt PA4/EXT, an external falling edge signal on I/O ports or a WDT overflow. An external reset causes a device initialization and the WDT overflow performs a warm reset. After the TO and PDF flags are examined, the cause for chip reset can be determined. The PDF flag is Rev. 1.00 12
Note: u stands for unchanged
November 22, 2005
HT82K94E/HT82K94A
To guarantee that the system oscillator is started and stabilized, the SST (System Start-up Timer) provides an extra delay of 1024 system clock pulses when the system resets (power-up, WDT time-out or RES reset) or when the system awakes from the HALT state. When a system reset occurs, an SST delay is added during the reset period. Any wake-up from HALT will enable the SST delay.
VDD RES S S T T im e - o u t C h ip R eset tS
ST
HALT W DT
RES
W a rm
R eset
OSC1
SST 1 0 - b it R ip p le C o u n te r S y s te m R eset
C o ld R eset
Reset Configuration The functional unit chip reset status are shown below.
Reset Timing Chart
V
DD
Program Counter Interrupt Prescaler WDT
000H Disable Clear Clear. After master reset, WDT begins counting
RES
Timer/event Counter Off Input/output Ports Stack Pointer Input mode Points to the top of the stack
Reset Circuit
The status of the registers are summarized in the following table. Reset (Power On) xxxx xxxx 00-0 1000 xxxx xxxx xxxx xxxx 00-0 1--000H xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx -xxx xxxx --00 xxxx -000 0000 1000 0111 1111 1111 1111 1111 1111 1111 1111 1111 WDT Time-out (Normal Operation) uuuu uuuu 00-0 1000 uuuu uuuu uuuu uuuu 00-0 1--000H uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu -uuu uuuu --1u uuuu -000 0000 1000 0111 1111 1111 1111 1111 1111 1111 1111 1111 RES Reset (Normal Operation) uuuu uuuu 00-0 1000 uuuu uuuu uuuu uuuu 00-0 1--000H uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu -uuu uuuu --uu uuuu -000 0000 1000 0111 1111 1111 1111 1111 1111 1111 1111 1111 RES Reset (HALT) uuuu uuuu 00-0 1000 uuuu uuuu uuuu uuuu 00-0 1--000H uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu -uuu uuuu --01 uuuu -000 0000 1000 0111 1111 1111 1111 1111 1111 1111 1111 1111 WDT Time-Out (HALT)* uuuu uuuu uu-u uuuu uuuu uuuu uuuu uuuu uu-u u--000H uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu -uuu uuuu --11 uuuu -uuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu USB-Reset (Normal) uuuu uuuu 00-0 1000 uuuu uuuu uuuu uuuu 00-0 1--000H uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu -uuu uuuu --uu uuuu -000 0000 1000 0111 1111 1111 1111 1111 1111 1111 1111 1111 USB-Reset (HALT) uuuu uuuu 00-0 1000 uuuu uuuu uuuu uuuu 00-0 1--000H uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu -uuu uuuu --01 uuuu -000 0000 1000 0111 1111 1111 1111 1111 1111 1111 1111 1111
Register
TMR0 TMR0C TMR1H TMR1L TMR1C Program Counter MP0 MP1 ACC TBLP TBLH STATUS INTC WDTS PA PAC PB PBC
Rev. 1.00
13
November 22, 2005
HT82K94E/HT82K94A
Reset (Power On) 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 0000 1111 0000 0000 0000 0000 0000 1111 0000 0000 0000 0000 0000 1111 xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx 11xx 0000 0100 0000 0000 0000 WDT Time-out (Normal Operation) 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuxx uuuu uuuu uuuu uuuu uuuu RES Reset (Normal Operation) 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 0000 1111 0000 0000 0000 0000 0000 1111 0000 0000 0000 0000 0000 1111 uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu 11xx 0000 0100 0000 0000 0000 RES Reset (HALT) 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 0000 1111 0000 0000 0000 0000 0000 1111 0000 0000 0000 0000 0000 1111 uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu 11xx 0000 0100 0000 0000 0000 WDT Time-Out (HALT)* uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuxx uuuu uuuu uuuu uuuu uuuu USB-Reset (Normal) 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 0000 1111 0000 0000 0000 0000 0000 1111 0000 0000 0000 0000 0000 1111 0000 0000 0000 0000 0000 0000 0000 0000 uu00 0u00 u1uu 0000 0uu0 u000 USB-Reset (HALT) 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 0000 1111 0000 0000 0000 0000 0000 1111 0000 0000 0000 0000 0000 1111 0000 0000 0000 0000 0000 0000 0000 0000 uu00 0u00 u1uu 0000 0uu0 u000
Register
PC PCC PD PDC PE PEC PIPE_CTRL AWR PIPE STALL SIES MISC Endpt_EN FIFO0 FIFO1 FIFO2 FIFO3 USC USR SCC Note:
* stands for warm reset u stands for unchanged x stands for unknown
Timer/Event Counter Two timer/event counters (TMR0, TMR1) are implemented in the microcontroller. The Timer/Event Counter 0 contains an 8-bit programmable count-up counter and the clock may comes from an external source or from fSYS/4. Bit No. 0~2, 5 3 4 Label 3/4 TE TON Unused bit, read as 0 To define the TMR0 active edge of Timer/Event Counter 0 (0=active on low to high; 1=active on high to low) To enable/disable timer 0 counting (0=disabled; 1=enabled) To define the operating mode 01=Event count mode (external clock) 10=Timer mode (internal clock) 11=Pulse width measurement mode 00=Unused TMR0C (0EH) Register The Timer/Event Counter 1 contains an 16-bit programmable count-up counter and the clock may come from an external source or from the system clock divided by 4.
Function
6 7
TM0 TM1
Rev. 1.00
14
November 22, 2005
HT82K94E/HT82K94A
Bit No. 0~2, 5 3 4 Label 3/4 TE TON Unused bit, read as 0 To define the TMR1 active edge of Timer/Event Counter 1 (0=active on low to high; 1=active on high to low) To enable/disable timer 1 counting (0=disabled; 1=enabled) To define the operating mode 01=Event count mode (external clock) 10=Timer mode (internal clock) 11=Pulse width measurement mode 00=Unused TMR1C (11H) Register Function
6 7
TM0 TM1
fS
YS
/4
D a ta B u s TM 1 TM 0 TE TM 1 TM 0 TON P u ls e W id th M e a s u re m e n t M o d e C o n tro l T im e r /E v e n t C o u n te r 0 O v e r flo w to In te rru p t T im e r /E v e n t C o u n te r 0 P r e lo a d R e g is te r R e lo a d
TM R0
Timer/Event Counter 0
D a ta B u s fS
Y S /4
TM R1 TE TM 1 TM 0 TON
TM 1 TM 0
1 6 B its T im e r /E v e n t C o u n te r P r e lo a d R e g is te r
L o w B y te B u ffe r R e lo a d
P u ls e W id th M e a s u re m e n t M o d e C o n tro l
1 6 B its T im e r /E v e n t C o u n te r (T M R 1 H /T M R 1 L )
O v e r flo w to In te rru p t
Timer/Event Counter 1 Using the internal clock source, there is only 1 reference time-base for Timer/Event Counter 0. The internal clock source is coming from fSYS/4. The external clock input allows the user to count external events, measure time intervals or pulse widths. Using the internal clock source, there is only 1 reference time-base for Timer/Event Counter 1. The internal clock source is coming from fSYS/4. The external clock input allows the user to count external events, measure time intervals or pulse widths. There are 2 registers related to the Timer/Event Counter 0; TMR0 ([0DH]), TMR0C ([0EH]). Two physical registers are mapped to TMR0 location; writing TMR0 makes the starting value be placed in the Timer/Event Counter 0 preload register and reading TMR0 gets the contents of the Timer/Event Counter 0. The TMR0C is a timer/event counter control register, which defines some options. Rev. 1.00 15 There are 3 registers related to Timer/Event Counter 1; TMR1H (0FH), TMR1L (10H), TMR1C (11H). Writing TMR1L will only put the written data to an internal lower-order byte buffer (8 bits) and writing TMR1H will transfer the specified data and the contents of the lower-order byte buffer to TMR1H and TMR1L preload registers, respectively. The Timer/Event Counter 1 preload register is changed by each writing TMR1H operations. Reading TMR1H will latch the contents of TMR1H and TMR1L counters to the destination and the lower-order byte buffer, respectively. Reading the TMR1L will read the contents of the lower-order byte buffer. The TMR1C is the Timer/Event Counter 1 control register, which defines the operating mode, counting enable or disable and active edge. The TM0, TM1 bits define the operating mode. The event count mode is used to count external events, which means the clock source comes from an external
November 22, 2005
HT82K94E/HT82K94A
(TMR0/TMR1) pin. The timer mode functions as a normal timer with the clock source coming from the fSYS/4 (Timer0/Timer1). The pulse width measurement mode can be used to count the high or low level duration of the external signal (TMR0/TMR1). The counting is based on the fSYS/4 (Timer0/Timer1). In the event count or timer mode, once the Timer/Event Counter 0/1 starts counting, it will count from the current contents in the Timer/Event Counter 0/1 to FFH or FFFFH. Once overflow occurs, the counter is reloaded from the Timer/Event Counter 0/1 preload register and generates the interrupt request flag (T0F/T1F; bit 5/6 of INTC) at the same time. In the pulse width measurement mode with the TON and TE bits equal to one, once the TMR0/TMR1 has received a transient from low to high (or high to low if the TE bits is 0) it will start counting until the TMR0/TMR1 returns to the original level and resets the TON. The measured result will remain in the Timer/Event Counter 0/1 even if the activated transient occurs again. In other words, only one cycle measurement can be done. Until setting the TON, the cycle measurement will function again as long as it receives further transient pulse. Note that, in this operating mode, the Timer/Event Counter 0/1 starts counting not according to the logic level but according to the transient edges. In the case of counter overflows, the counter 0/1 is reloaded from the Timer/Event Counter 0/1 preload register and issues the interrupt request just like the other two modes. To enable the counting operation, the timer ON bit (TON; bit 4 of TMR0C/TMR1C) should be set to 1. In the pulse width measurement mode, the TON will be cleared automatically after the measurement cycle is completed. But in the other two modes the TON can only be reset by instructions. The overflow of the Timer/Event Counter 0/1 is one of the wake-up sources. No matter what the operation mode is, writing a 0 to ET0I/ET1I can disable the corresponding interrupt services. In the case of Timer/Event Counter 0/1 OFF condition, writing data to the Timer/Event Counter 0/1 preload register will also reload that data to the Timer/Event Counter 0/1. But if the Timer/Event Counter 0/1 is turned on, data written to it will only be kept in the Timer/Event Counter 0/1 preload register. The Timer/Event Counter 0/1 will still operate until overflow occurs (a Timer/Event Counter 0/1 reloading will occur at the same time). When the Timer/Event Counter 0/1 (reading TMR0/TMR1) is read, the clock will be blocked to avoid errors. As clock blocking may results in a counting error, this must be taken into consideration by the programmer. Input/Output Ports There are 40 bidirectional input/output lines in the microcontroller, labeled from PA to PE, which are mapped to the data memory of [12H], [14H], [16H], [18H] and [1AH] respectively. All of these I/O ports can be used for input and output operations. For input operation, these ports are non-latching, that is, the inputs must be ready at the T2 rising edge of instruction MOV A,[m] (m=12H, 14H, 16H, 18H or 1AH). For output operation, all the data is latched and remains unchanged until the output latch is rewritten. Each I/O line has its own control register (PAC, PBC, PCC, PDC, PEC) to control the input/output configuration. With this control register, CMOS/NMOS/PMOS output or Schmitt trigger input with or without pull-high resistor structures can be reconfigured dynamically under software control. To function as an input, the corresponding latch of the control register must write a 1. The input source also depends on the control register. If the control register bit is 1, the input will read the pad state. If the control register bit is 0, the contents of the latches will move to the internal bus. The latter is possible in the read-modify-write instruction. For output function, CMOS is the only except port A which can be
V C o n tr o l B it
DD
D a ta B u s
D
PH
Q CK S Q PA PB PC PD PE 0~ 0~ 0~ 0~ 0~ PA PB PC PD PE 7 7 6 , P D 4 /T M R 0 7 7
W r ite C o n tr o l R e g is te r C h ip R e s e t R e a d C o n tr o l R e g is te r
D a ta B it Q D CK S PL M U X W a k e - u p O p tio n fo r a n y I/O Q
W r ite D a ta R e g is te r
P A O u tp u t C o n fig u r a tio n R e a d D a ta R e g is te r W a k e -u p fo r a n y I/O P o rt
P o rt
P A 7 /T M R 1
Input/Output Ports
Rev. 1.00
16
November 22, 2005
HT82K94E/HT82K94A
optioned as CMOS/NMOS/PMOS configurations. These control registers are mapped to locations 13H, 15H, 17H and 19H. After a chip reset, these input/output lines remain at high levels or floating state (depending on the pull-high options). Each bit of these input/output latches can be set or cleared by SET [m].i and CLR [m].i (m=12H, 14H, 16H or 18H) instructions. Some instructions first input data and then follow the output operations. For example, SET [m].i, CLR [m].i, CPL [m], CPLA [m] read the entire port states into the CPU, execute the defined operations (bit-operation), and then write the results back to the latches or the accumulator. Each line of all the I/O ports have the capability of waking up the device. There are pull-high options available for I/O lines. Once the pull-high option of an I/O line is selected, the I/O line have pull-high resistor. Otherwise, the pull-high resistor is absent. It should be noted that a non-pull-high I/O line operating in input mode will cause a floating state. It is recommended that unused or not bonded out I/O lines should be set as output pins by software instruction to avoid consuming power under input floating state. Low Voltage Reset/Detector - LVR/LVD The microcontroller contains a low voltage reset circuit in order to monitor the supply voltage of the device. If the supply voltage of the device drops to within a range of 0.9V~VLVR such as might occur when changing the battery, the LVR will automatically reset the device internally. The LVR includes the following specifications:
* For a valid LVR signal, a low voltage i.e. a voltage in
the range between 0.9V~VLVR must exist for greater than 1ms. If the low voltage state does not exceed 1ms, the LVR will ignore it and do not perform a reset function.
* The LVR uses the OR function with the external
RES signal to perform chip reset. The relationship between VDD and VLVR is shown below.
VDD 5 .5 V V
OPR
5 .5 V
V 2 .2 V ~ 2 .4 V 2 .0 V ~ 2 .2 V
LVR
0 .9 V
Note:
VOPR is the voltage range for proper chip operation at 4MHz system clock.
There is a low voltage detector (LVD) and a low voltage reset circuit (LVR) implemented in the microcontrollers. Where LVR function can be enabled/disabled by options. User can read the LVD detector status (0/1) from MISC.5. The LVR has the same effect or function with the external RES signal which performs a chip reset. Both LVR and LVD functions will disable in the HALT mode. There are two kind of LVR/LVD definition: 2-battery or 3-battery option. When 2-battery option is selected: LVR=2.2V; LVD=2.4V. Otherwise, 3-battery option is selected: LVR=2.4V; LVD=2.6V.
V 5 .5 V
DD
V
LVR
LVR
D e te c t V o lta g e
0 .9 V 0V R e s e t S ig n a l
R eset *1
N o r m a l O p e r a tio n *2
R eset
Low Voltage Reset Note: *1. To make sure that the system oscillator has stabilized, the SST provides an extra delay of 1024 system clock pulses before entering the normal operation. *2. Since low voltage has to be maintained for over 1ms in its original state, therefore theres a 1ms delay before entering the reset mode Rev. 1.00 17 November 22, 2005
HT82K94E/HT82K94A
Suspend Wake-Up and Remote Wake-Up If there is no signal on the USB bus for over 3ms, the HT82K94E/HT82K94A will go into suspend mode. The Suspend line (bit 0 of the USC) will be set to 1 and a USB interrupt is triggered to indicate that the HT82K94E/HT82K94A should jump to the suspend state to meet the 500mA USB suspend current spec. In order to meet the 500mA suspend current, the firmware should disable the USB clock by clearing the USBCKEN (bit3 of the SCC) to 0. The suspend current is 400mA. User can further decrease the suspend current to 250mA by setting the SUSP2 (bit4 of the SCC). But if the SUSP2 is set, user should make sure not to enable the LVR OPT option, otherwise the HT82K94E/HT82K94A will be reset. When the resume signal is sent out by the host, the HT82K94E/HT82K94A will wake-up the MCUby USB interrupt and the Resume line (bit 3 of the USC) is set. In order to make the HT82K94E/HT82K94A function properly, the firmware must set the USBCKEN (bit 3 of the SCC) to 1 and clear the SUSP2 (bit4 of the SCC). Since the Resume signal will be cleared before the Idle signal is sent out by the host, the Suspend line (bit 0 of the USC) will be set to 0. So when the MCU is detecting the Suspend line (bit0 of USC), the Resume line should be remembered and taken into consideration. After finishing the resume signal, the suspend line will go inactive and a USB interrupt is triggered. The following is the timing diagram.
SUSPEND U S B R e s u m e S ig n a l
The device with remote wake-up function can wake-up the USB Host by sending a wake-up pulse through RMWK (bit 1 of the USC). Once the USB Host receives a wake-up signal from the HT82K94E/HT82K94A, it will send a Resume signal to the device. The timing is as follows:
SUSPEND M in . 1 U S B C L K RMW K
M in .2 .5 m s
U S B R e s u m e S ig n a l
U S B _ IN T
To Configure the HT82K94E/HT82K94A as PS2 Device The HT82K94E/HT82K94A can be configured as a USB interface or PS2 interface device, by configuring the SPS2 (bit 4 of USR) and SUSB (bit 5 of the USR). If SPS2=1, and SUSB=0, the HT82K94E/HT82K94A is configured as a PS2 interface, pin USBD- is configured as a PS2 Data pin and USBD+ is configured as a PS2 Clk pin. User can easily read or write to the PS2 Data or PS2 Clk pin by accessing the corresponding bit PS2DAI (bit 4 of the USC), PS2CKI (bit 5 of the USC), PS2DAO (bit 6 of the USC) and S2CKO (bit 7 of the USC) respectively. User should make sure that in order to read the data properly, the corresponding output bit must be set to 1. For example, if it is desired to read the PS2 Data by reading PS2DAI, the PS2DAO should set to 1. Otherwise it is always read as 0. If SPS2=0, and SUSB=1, the HT82K94E/HT82K94A is configured as a USB interface. Both the USBD- and USBD+ is driven by the SIE of the HT82K94E/ HT82K94A. User can only write or read the USB data through the corresponding FIFO. Both SPS2 and SUSB default is 0.
U S B _ IN T
USB Interface There are eleven registers, including PIPE_CTRL (41H in bank 1), AWR (address + remote wake-up 42H in bank 1), STALL (43H in bank 1), PIPE (44H in bank 1), SIES (45H in bank 1), MISC (46H in bank 1), Endpt_EN (47H in bank 1), FIFO0 (48H in bank 1), FIFO1 (49H in bank 1), FIFO2 (4AH in bank 1) and FIFO3 (4BH in bank 1) used for the USB function. AWR register contains current address and a remote wake up function control bit. The initial value of AWR is 00H. The address value extracted from the USB command is not to be loaded into this register until the SETUP stage is completed. Bit No. 0 7~1 Label WKEN AD6~AD0 R/W W W Remote wake-up enable/disable USB device address AWR (42H) Register Function
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HT82K94E/HT82K94A
STALL, PIPE, PIPE_CTRL and Endpt_EN Registers PIPE register represents whether the endpoint corresponding is accessed by host or not. After ACT_EN signal being sent out, MCU can check which endpoint had been accessed. This register is set only after the time when host access the corresponding endpoint. STALL register shows whether the endpoint corresponding works or not. As soon as the endpoint work improperly, the bit corresponding must be set. PIPE_CTRL Register is used for configuring IN (Bit=1) or OUT (Bit=0)Pipe. The default is define IN pipe. Where Bit0 (DATA0) of the PIPE_CTRL Register is used to setting the data toggle of any endpoint (except endpoint0) using data toggles to the value DATA0. Once the user want the any endpoint (except endpoint0) using data toggles to the value DATA0. the user can output a LOW pulse to this bit. The LOW pulse period must at least 10 instruction cycle. Endpt_EN Register is used to enable or disable the corresponding endpoint (except endpoint 0) Enable Endpoint (Bit=1) or disable Endpoint (Bit=0) The bitmaps are list as follows : Register Name PIPE_CTRL STALL PIPE Endpt_EN R/W R/W R/W R R/W Register Address 01000001B 01000011B 01000100B 01000001B Bit7~Bit4 Reserved 3/4 3/4 3/4 3/4 Bit 3 Pipe 3 Pipe 3 Pipe 3 Pipe 3 Bit 2 Pipe 2 Pipe 2 Pipe 2 Pipe 2 Bit 1 Pipe 1 Pipe 1 Pipe 1 Pipe 1 Bit 0 Pipe 0 Pipe 0 Pipe 0 Pipe 0 Default Value 00001111 00001111 00000000 00001111
PIPE_CTRL (41H), STALL (43H), PIPE (44H) and Endpt_EN (47H) Registers The SIES Register is used to indicate the present signal state which the SIE receives and also defines whether the SIE has to change the device address automatically. Bit7 Func. R/W Reg_ Adr NMI R/W Bit6 EOT R Bit5 CRC_ERR R/W Bit4 NAK R 01000101B SIES (45H) Register Func. Name R/W Description This bit is used to configure the SIE to automatically change the device address with the value of the Address+Remote_WakeUp Register (42H). When this bit is set to 1 by F/W, the SIE will update the device address with the value of the Address+Remote_WakeUp Register (42H) after the PC Host has successfully read the data from the device by the IN operation. The SIE will clear the bit after updating the device address. Otherwise, when this bit is cleared to 0, the SIE will update the device address immediately after an address is written to the Address+Remote_WakeUp Register (42H) Default 0 This bit is used to indicate that some errors have occurred when accessing the FIFO0. This bit is set by SIE and cleared by F/W. Default 0 This bit is used to indicate that an OUT token (except for the OUT zero length) has been received. The F/W clear the bit after the OUT data has been read. This bit will also be cleared by the SIE after the next valid SETUP token is received. Default 0 This bit is used to indicate that the current signal the USB is receiving from the PC Host is IN token. This bit is used to indicate that the SIE is transmitting NAK signal to the Host in response to the PC Host IN or OUT token. Bit3 IN R Bit2 OUT R/W Bit1 F0_ERR R/W Bit0 Adr_set R/W
Adr_ set
R/W
F0_Err
R/W
Out
R/W
IN NAK
R R
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HT82K94E/HT82K94A
Func. Name CRC_ERR R/W R/W Description This bit is used to indicate there are CRCerror (bit=1). Firmware must do something to save the device and keep it in good condition. This bit is set by SIE and cleared by F/W. End of transaction flag, normal status is 1. If suspend=1 line & EOT=0 indicates that something is wrong in the USB Interface. Firmware in-charge must do something to save the device and keep it in good condition. This bit is used to control whether the USB interrupt is output to the MCU in NAK response to the PC Host IN or OUT token. 1: has only USB interrupt, data is transmitted to the PC host or data is received from the PC Host 0: always has USB interrupt if the USB accesses FIFO0 Default 0 SIES Function MISC register combines a command and status to control desired endpoint FIFO action and to show the status of the desired endpoint FIFO. The MISC will be cleared by USB reset signal. Bit No. 0 Label REQ R/W R/W Function After setting the other status of the desired one in the MISC, endpoint FIFO can be requested by setting this bit to 1. After the job has been done, this bit has to be cleared to 0. This bit defines the direction of data transferring between MCU and endpoint FIFO. When the TX is set to 1, this means that the MCU wants to write data to the endpoint FIFO. After the job has been done, this bit has to be cleared to 0 before terminating request to represent the end of transferring. For reading action, this bit has to be cleared to 0 to represent that MCU wants to read data from the endpoint FIFO and has to be set to 1 after the job is done. Clear the requested endpoint FIFO, even if the endpoint FIFO is not ready. Defines which endpoint FIFO is selected, SELP1,SELP0: 00: endpoint FIFO0 01: endpoint FIFO1 10: endpoint FIFO2 11: endpoint FIFO3 Used to show that the data in endpoint FIFO is a SETUP command. This bit has to be cleared by firmware. That is to say, even the MCU is busy, the device will not miss any SETUP commands from the host. Read only status bit, this bit is used to indicate that the desired endpoint FIFO is ready to work. Used to indicate that a 0-sized packet is sent from a host to the MCU. This bit should be cleared by firmware. MISC (46H) Register The MCU can communicate with the endpoint FIFO by setting the corresponding registers, of which address is listed in the following table. After reading the current data, next data will show after 2ms, used to check the endpoint FIFO status and response to MISC register, if read/write action is still going on. Registers FIFO0 FIFO1 FIFO2 FIFO3 R/W R/W R/W R/W R/W Bank 1 1 1 1 Address 48H 49H 4AH 4BH Bit7~Bit0 Data7~Data0 Data7~Data0 Data7~Data0 Data7~Data0
EOT
R
NMI
R/W
1
TX
R/W
2
CLEAR
R/W
4 3
SELP1 SELP0
R/W
5
SCMD
R/W
6 7
READY LEN0
R R/W
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HT82K94E/HT82K94A
There are some timing constrains and usages illustrated here. By setting the MISC register, MCU can perform reading, writing and clearing actions. There are some examples shown in the following table for endpoint FIFO reading, writing and clearing. Actions Read FIFO0 sequence Write FIFO1 sequence Check whether FIFO0 can be read or not Check whether FIFO1 can be written or not Read 0-sized packet sequence form FIFO0 Write 0-sized packet sequence to FIFO1 Note: MISC Setting Flow and Status 00H(R)01H(R)delay 2ms, check 41H(R)read* from FIFO0 register and check not ready (01H)(R)03H(R)02H 0AH(R)0BH(R)delay 2ms, check 4BH(R)write* to FIFO1 register and check not ready (0BH)(R)09H(R)08H 00H(R)01H(R)delay 2ms, check 41H (ready) or 01H (not ready)(R)00H 0AH(R)0BH(R)delay 2ms, check 4BH (ready) or 0BH (not ready)(R)0AH 00H(R)01H(R)delay 2ms, check 81H(R)read once (01H)(R)03H(R)02H 0AH(R)0BH(R)delay 2ms, check 0BH(R)0FH(R)0DH(R)08H
*: There are 2ms existing between 2 reading action or between 2 writing action
USB/PS2 Status and Control Register The register is used to indicate there are USB suspend, USB resume and USB reset signal in USB bus. Also user can output a high pulse in RMWK bit to wake-up the PC for USB remote function. Bit No. 0 Label SUSP R/W R Function Read only, USB suspend indication. When this bit is set to 1 (set by SIE), it indicates the USB bus enters suspend mode. The USB interrupt is also triggered on any changes of this bit. USB remote wake-up command. It is set by MCU to force the USB host leaving the suspend mode. When this bit is set to 1, 2ms delay for clearing this bit to 0 is needed to insure the RMWK command is accepted by SIE. USB reset indication. This bit is set/cleared by USB SIE. This bit is used to detect which bus (PS2 or USB) is attached. When the URST is set to 1, this indicates that a USB reset has occurred (the attached bus is USB) and a USB interrupt will be initialized. USB resume indication. When the USB leaves the suspend mode, this bit is set to 1 (set by SIE). This bit will appear 20ms waiting for the MCU to detect. When the RESUME is set by the SIE, an interrupt will be generated to wake-up the MCU. In order to detect the suspend state, the MCU should set the USBCKEN and clear SUSP2 (in SCC register) to enable the SIE detecting function. The RESUME will be cleared while the SUSP is going 0. When the MCU is detecting the SUSP, the RESUME (wakes-up the MCU ) should be remembered and taken into consideration. Read only, USBD-/DATA input Read only, USBD+/CLK input Data for driving the USBD-/DATA pin (Default=1) Data for driving the USBD+/CLK pin (Default=1) USC (1CH) Register
1
RMWK
W
2
URST
R/W
3
RESUME
R
4 5 6 7
PS2DAI PS2CKI PS2DAO PS2CKO
R R W W
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USB Endpoint Interrupt Status Register The register is used to indicate which endpoint is accessed or has external interrupt PA4/EXT is activated and to select the serial bus (PS2 or USB). The endpoint request flags (EP0IF, EP1IF, EP2IF, EP3IF and EXTIF) are used to indicate which endpoints are accessed. If an endpoint is accessed, the related endpoint request flag will be set to 1 and the USB interrupt will occur (if the USB interrupt is enabled and the stack is not full). When the active endpoint request flag is served, the endpoint request flag has to be cleared to 0. Where USB_flag bit is only a bit for firmware to store the USB-mode data. This bit only clear to zero after power-on reset. Bit No. 0 Label EP0IF R/W R/W Function When this bit is set to 1 (set by the SIE), it indicates the endpoint 0 is accessed and a USB interrupt will occur. When the interrupt has been served, this bit should be cleared by firmware. When this bit is set to 1 (set by the SIE), it indicates the endpoint 1 is accessed and a USB interrupt will occur. When the interrupt has been served, this bit should be cleared by firmware. When this bit is set to 1 (set by the SIE), it indicates the endpoint 2 is accessed and a USB interrupt will occur. When the interrupt has been served, this bit should be cleared by firmware. When set to 1, indicated endpoint 3 interrupt event . Must wait MCU to process interrupt event, then clear this bit by firmware. This bit must be 0, then next interrupt event will be process. Default value is 0. The PS2 function is selected when this bit is set to 1. (Default=0) The USB function is selected when this bit is set to 1. (Default=0) When set to 1, indicated external PA4 interrupt event . Must wait MCU to process interrupt event, then clear this bit by firmware. This bit must be 0, then next interrupt event will be process. Default value is 0. This flag is used to show the MCU is in USB mode. (Bit=1) This bit is R/W by FW and will be cleared to 0 after power-on reset. (Default=0) USR (1DH) Register System Clock Control Register This register is designed to control the system clock and make the device to meet USB 500mA suspend current spec. as well as a LVD indicator. Since the device can operate at 6MHz or 12MHz in USB mode, so in order to make SIE work properly, there should has a SYSCLK bit to indicate what system frequency is working. The USBCKEN bit is used to turn-off or turn-on the SIE system clock to meet the USB 500mA suspend current. For normal operation, this bit must be 1. Otherwise, the SIE cannot detect the USB signal. User can control EXT_INTENbit to enable or disable the external interrupt PA4/EXT. PS2_flag bit is only a bit for firmware to stone the PS2 mode data. This bit only clear to zero by hardware after power-on reset.
1
EP1IF
R/W
2
EP2IF
R/W
3 4 5 6
EP3IF SPS2 SUSB EXTIF
R/W R/W R/W R/W
7
USB_flag
R/W
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HT82K94E/HT82K94A
Bit No. 0 1 Label 3/4 OSC_ctrl R/W 3/4 R/W Undefined, should be cleared to 0 To control to check the LVD voltage 1=Read LVD 0=Off (default) 1: enable the external interrupt 0: disable the external interrupt (default) USB clock control bit. When this bit is set to 1, it indicates that the USB clock is enabled. Otherwise, the USB clock is turned-off. (Default=0) This bit is used for decreasing power consumption in suspend mode. In normal mode clean this bit=0 (Default=0) In HALT mode set this bit=1 for decreasing power consumption. This flag is used to show the MCU is under PS2 mode. (Bit=1) This bit is R/W by FW and will be cleared to 0 after power-on reset. (Default=0) This bit is used to specify the system oscillator frequency used by the MCU. If a 6MHz crystal oscillator or resonator is used, this bit should be set to 1. If a 12MHz crystal oscillator or resonator is used, this bit should be cleared to 0 (default). 1: battery voltage low 0: battery voltage high SCC (1EH) Register Table High Byte Pointer for Current Table Read TBHP (Address 0X1F) Register (0X1F) Options The following table shows all kinds of option in the microcontroller. All of the options must be defined to ensure proper system functioning. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Chip lock bit (by bit) PA0~PA7 pull-high resistor enabled or disabled (by bit) PB0~PB7 pull-high resistor enabled or disabled (by nibble) PC0~PC7 pull-high resistor enabled or disabled (by nibble) PD0~PD7 pull-high resistor enabled or disabled (by nibble) PE0~PE7 pull-high resistor enabled or disabled (by nibble) LVR enable or disable WDT enable or disable WDT clock source: fSYS/4 or WDTOSC CLRWDT instruction(s): 1 or 2 PA0~PA7 output structures: CMOS/NMOS open-drain/PMOS open-drain (by bit) PA0~PA7 wake-up enabled or disabled (by bit) PB0~PB7 wake-up enabled or disabled (by nibble) PC0~PC7 wake-up enabled or disabled (by nibble) PD0~PD7 wake-up enabled or disabled (by nibble) TBHP enable or disable (default disable) LVR/LVD kind: 2-battery or 3-battery Option Bits 4~0 Labels PGC4~PGC0 Read/Write R/W Option 3/4 Functions Store current table read bit12~bit8 data Function
2 3
EXT_INTEN R/W USBCKEN R/W
4
SUSP2
R/W
5
PS2_flag
R/W
6
SYSCLK
R/W
7
LVD
R/W
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HT82K94E/HT82K94A
Application Circuits
Crystal or Ceramic Resonator for Multiple I/O Applications
PA0~PA7
VDD USBUSB+ VSS 0 .1 m F
5W
*
10mF
33W
*
0 .1 m F 22pF
*
VDD
PB0~PB7 PC0~PC7 PD0~PD7 PE0~PE7
100kW
5W
*
10kW 0 .1 m F
** 22pF ** 0 .1 m F
X1
OSC1
V33O
1 .5 k W
0 .1 m F
47pF*
OSC2
*
RES
U S B D -/D A T A 47pF*
33W
* *
*
VSS U S B D + /C L K
*
47pF 33W
H T 8 2 K 9 4 E /H T 8 2 K 9 4 A
Note:
*
47pF
The resistance and capacitance for reset circuit should be designed in such a way as to ensure that the VDD is stable and remains within a valid operating voltage range before bringing RES to high. X1 can use 6MHz or 12MHz, X1 as close OSC1 & OSC2 as possible. Components with * are used for EMC issue. Components with ** are used for resonator only.
Rev. 1.00
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November 22, 2005
HT82K94E/HT82K94A
Instruction Set Summary
Mnemonic Arithmetic ADD A,[m] ADDM A,[m] ADD A,x ADC A,[m] ADCM A,[m] SUB A,x SUB A,[m] SUBM A,[m] SBC A,[m] SBCM A,[m] DAA [m] Add data memory to ACC Add ACC to data memory Add immediate data to ACC Add data memory to ACC with carry Add ACC to data memory with carry Subtract immediate data from ACC Subtract data memory from ACC Subtract data memory from ACC with result in data memory Subtract data memory from ACC with carry Subtract data memory from ACC with carry and result in data memory Decimal adjust ACC for addition with result in data memory 1 1(1) 1 1 1(1) 1 1 1(1) 1 1(1) 1(1) Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV C Description Instruction Cycle Flag Affected
Logic Operation AND A,[m] OR A,[m] XOR A,[m] ANDM A,[m] ORM A,[m] XORM A,[m] AND A,x OR A,x XOR A,x CPL [m] CPLA [m] AND data memory to ACC OR data memory to ACC Exclusive-OR data memory to ACC AND ACC to data memory OR ACC to data memory Exclusive-OR ACC to data memory AND immediate data to ACC OR immediate data to ACC Exclusive-OR immediate data to ACC Complement data memory Complement data memory with result in ACC 1 1 1 1(1) 1(1) 1(1) 1 1 1 1(1) 1 Z Z Z Z Z Z Z Z Z Z Z
Increment & Decrement INCA [m] INC [m] DECA [m] DEC [m] Rotate RRA [m] RR [m] RRCA [m] RRC [m] RLA [m] RL [m] RLCA [m] RLC [m] Data Move MOV A,[m] MOV [m],A MOV A,x Bit Operation CLR [m].i SET [m].i Clear bit of data memory Set bit of data memory 1(1) 1(1) None None Move data memory to ACC Move ACC to data memory Move immediate data to ACC 1 1(1) 1 None None None Rotate data memory right with result in ACC Rotate data memory right Rotate data memory right through carry with result in ACC Rotate data memory right through carry Rotate data memory left with result in ACC Rotate data memory left Rotate data memory left through carry with result in ACC Rotate data memory left through carry 1 1(1) 1 1(1) 1 1(1) 1 1(1) None None C C None None C C Increment data memory with result in ACC Increment data memory Decrement data memory with result in ACC Decrement data memory 1 1(1) 1 1(1) Z Z Z Z
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November 22, 2005
HT82K94E/HT82K94A
Mnemonic Branch JMP addr SZ [m] SZA [m] SZ [m].i SNZ [m].i SIZ [m] SDZ [m] SIZA [m] SDZA [m] CALL addr RET RET A,x RETI Table Read TABRDC [m](5) Read ROM code (locate by TBLP and TBHP) to data memory and TBLH TABRDC [m](6) Read ROM code (current page) to data memory and TBLH Read ROM code (last page) to data memory and TBLH TABRDL [m] Miscellaneous NOP CLR [m] SET [m] CLR WDT CLR WDT1 CLR WDT2 SWAP [m] SWAPA [m] HALT Note: No operation Clear data memory Set data memory Clear Watchdog Timer Pre-clear Watchdog Timer Pre-clear Watchdog Timer Swap nibbles of data memory Swap nibbles of data memory with result in ACC Enter power down mode 1 1(1) 1(1) 1 1 1 1(1) 1 1 None None None TO,PDF TO(4),PDF(4) TO(4),PDF(4) None None TO,PDF 2(1) 2(1) 2(1) None None None Jump unconditionally Skip if data memory is zero Skip if data memory is zero with data movement to ACC Skip if bit i of data memory is zero Skip if bit i of data memory is not zero Skip if increment data memory is zero Skip if decrement data memory is zero Skip if increment data memory is zero with result in ACC Skip if decrement data memory is zero with result in ACC Subroutine call Return from subroutine Return from subroutine and load immediate data to ACC Return from interrupt 2 1(2) 1(2) 1(2) 1(2) 1(3) 1(3) 1(2) 1(2) 2 2 2 2 None None None None None None None None None None None None None Description Instruction Cycle Flag Affected
x: Immediate data m: Data memory address A: Accumulator i: 0~7 number of bits addr: Program memory address O: Flag is affected -: Flag is not affected
(1)
: If a loading to the PCL register occurs, the execution cycle of instructions will be delayed for one more cycle (four system clocks). : If a skipping to the next instruction occurs, the execution cycle of instructions will be delayed for one more cycle (four system clocks). Otherwise the original instruction cycle is unchanged. : and (2)
(2)
(3) (1) (4)
: The flags may be affected by the execution status. If the Watchdog Timer is cleared by executing the CLR WDT1 or CLR WDT2 instruction, the TO and PDF are cleared. Otherwise the TO and PDF flags remain unchanged. : ROM code TBHP option is enabled : ROM code TBHP option is disabled
(5) (6)
Rev. 1.00
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November 22, 2005
HT82K94E/HT82K94A
Instruction Definition
ADC A,[m] Description Operation Affected flag(s) TO 3/4 ADCM A,[m] Description Operation Affected flag(s) TO 3/4 ADD A,[m] Description Operation Affected flag(s) TO 3/4 ADD A,x Description Operation Affected flag(s) TO 3/4 ADDM A,[m] Description Operation Affected flag(s) TO 3/4 PDF 3/4 OV O Z O AC O C O PDF 3/4 OV O Z O AC O C O PDF 3/4 OV O Z O AC O C O PDF 3/4 OV O Z O AC O C O PDF 3/4 OV O Z O AC O C O Add data memory and carry to the accumulator The contents of the specified data memory, accumulator and the carry flag are added simultaneously, leaving the result in the accumulator. ACC ACC+[m]+C
Add the accumulator and carry to data memory The contents of the specified data memory, accumulator and the carry flag are added simultaneously, leaving the result in the specified data memory. [m] ACC+[m]+C
Add data memory to the accumulator The contents of the specified data memory and the accumulator are added. The result is stored in the accumulator. ACC ACC+[m]
Add immediate data to the accumulator The contents of the accumulator and the specified data are added, leaving the result in the accumulator. ACC ACC+x
Add the accumulator to the data memory The contents of the specified data memory and the accumulator are added. The result is stored in the data memory. [m] ACC+[m]
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November 22, 2005
HT82K94E/HT82K94A
AND A,[m] Description Operation Affected flag(s) TO 3/4 AND A,x Description Operation Affected flag(s) TO 3/4 ANDM A,[m] Description Operation Affected flag(s) TO 3/4 CALL addr Description PDF 3/4 OV 3/4 Z O AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z O AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z O AC 3/4 C 3/4 Logical AND accumulator with data memory Data in the accumulator and the specified data memory perform a bitwise logical_AND operation. The result is stored in the accumulator. ACC ACC AND [m]
Logical AND immediate data to the accumulator Data in the accumulator and the specified data perform a bitwise logical_AND operation. The result is stored in the accumulator. ACC ACC AND x
Logical AND data memory with the accumulator Data in the specified data memory and the accumulator perform a bitwise logical_AND operation. The result is stored in the data memory. [m] ACC AND [m]
Subroutine call The instruction unconditionally calls a subroutine located at the indicated address. The program counter increments once to obtain the address of the next instruction, and pushes this onto the stack. The indicated address is then loaded. Program execution continues with the instruction at this address. Stack Program Counter+1 Program Counter addr
Operation Affected flag(s)
TO 3/4 CLR [m] Description Operation Affected flag(s) TO 3/4
PDF 3/4
OV 3/4
Z 3/4
AC 3/4
C 3/4
Clear data memory The contents of the specified data memory are cleared to 0. [m] 00H
PDF 3/4
OV 3/4
Z 3/4
AC 3/4
C 3/4
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HT82K94E/HT82K94A
CLR [m].i Description Operation Affected flag(s) TO 3/4 CLR WDT Description Operation Affected flag(s) TO 0 CLR WDT1 Description PDF 0 OV 3/4 Z 3/4 AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 Clear bit of data memory The bit i of the specified data memory is cleared to 0. [m].i 0
Clear Watchdog Timer The WDT is cleared (clears the WDT). The power down bit (PDF) and time-out bit (TO) are cleared. WDT 00H PDF and TO 0
Preclear Watchdog Timer Together with CLR WDT2, clears the WDT. PDF and TO are also cleared. Only execution of this instruction without the other preclear instruction just sets the indicated flag which implies this instruction has been executed and the TO and PDF flags remain unchanged. WDT 00H* PDF and TO 0*
Operation Affected flag(s)
TO 0* CLR WDT2 Description
PDF 0*
OV 3/4
Z 3/4
AC 3/4
C 3/4
Preclear Watchdog Timer Together with CLR WDT1, clears the WDT. PDF and TO are also cleared. Only execution of this instruction without the other preclear instruction, sets the indicated flag which implies this instruction has been executed and the TO and PDF flags remain unchanged. WDT 00H* PDF and TO 0*
Operation Affected flag(s)
TO 0* CPL [m] Description Operation Affected flag(s) TO 3/4
PDF 0*
OV 3/4
Z 3/4
AC 3/4
C 3/4
Complement data memory Each bit of the specified data memory is logically complemented (1s complement). Bits which previously contained a 1 are changed to 0 and vice-versa. [m] [m]
PDF 3/4
OV 3/4
Z O
AC 3/4
C 3/4
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November 22, 2005
HT82K94E/HT82K94A
CPLA [m] Description Complement data memory and place result in the accumulator Each bit of the specified data memory is logically complemented (1s complement). Bits which previously contained a 1 are changed to 0 and vice-versa. The complemented result is stored in the accumulator and the contents of the data memory remain unchanged. ACC [m]
Operation Affected flag(s)
TO 3/4 DAA [m] Description
PDF 3/4
OV 3/4
Z O
AC 3/4
C 3/4
Decimal-Adjust accumulator for addition The accumulator value is adjusted to the BCD (Binary Coded Decimal) code. The accumulator is divided into two nibbles. Each nibble is adjusted to the BCD code and an internal carry (AC1) will be done if the low nibble of the accumulator is greater than 9. The BCD adjustment is done by adding 6 to the original value if the original value is greater than 9 or a carry (AC or C) is set; otherwise the original value remains unchanged. The result is stored in the data memory and only the carry flag (C) may be affected. If ACC.3~ACC.0 >9 or AC=1 then [m].3~[m].0 (ACC.3~ACC.0)+6, AC1=AC else [m].3~[m].0 (ACC.3~ACC.0), AC1=0 and If ACC.7~ACC.4+AC1 >9 or C=1 then [m].7~[m].4 ACC.7~ACC.4+6+AC1,C=1 else [m].7~[m].4 ACC.7~ACC.4+AC1,C=C
Operation
Affected flag(s) TO 3/4 DEC [m] Description Operation Affected flag(s) TO 3/4 DECA [m] Description Operation Affected flag(s) TO 3/4 PDF 3/4 OV 3/4 Z O AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z O AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C O
Decrement data memory Data in the specified data memory is decremented by 1. [m] [m]-1
Decrement data memory and place result in the accumulator Data in the specified data memory is decremented by 1, leaving the result in the accumulator. The contents of the data memory remain unchanged. ACC [m]-1
Rev. 1.00
30
November 22, 2005
HT82K94E/HT82K94A
HALT Description Enter power down mode This instruction stops program execution and turns off the system clock. The contents of the RAM and registers are retained. The WDT and prescaler are cleared. The power down bit (PDF) is set and the WDT time-out bit (TO) is cleared. Program Counter Program Counter+1 PDF 1 TO 0
Operation
Affected flag(s) TO 0 INC [m] Description Operation Affected flag(s) TO 3/4 INCA [m] Description Operation Affected flag(s) TO 3/4 JMP addr Description Operation Affected flag(s) TO 3/4 MOV A,[m] Description Operation Affected flag(s) TO 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 Directly jump The program counter are replaced with the directly-specified address unconditionally, and control is passed to this destination. Program Counter addr PDF 3/4 OV 3/4 Z O AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z O AC 3/4 C 3/4 PDF 1 OV 3/4 Z 3/4 AC 3/4 C 3/4
Increment data memory Data in the specified data memory is incremented by 1 [m] [m]+1
Increment data memory and place result in the accumulator Data in the specified data memory is incremented by 1, leaving the result in the accumulator. The contents of the data memory remain unchanged. ACC [m]+1
Move data memory to the accumulator The contents of the specified data memory are copied to the accumulator. ACC [m]
Rev. 1.00
31
November 22, 2005
HT82K94E/HT82K94A
MOV A,x Description Operation Affected flag(s) TO 3/4 MOV [m],A Description Operation Affected flag(s) TO 3/4 NOP Description Operation Affected flag(s) TO 3/4 OR A,[m] Description Operation Affected flag(s) TO 3/4 OR A,x Description Operation Affected flag(s) TO 3/4 ORM A,[m] Description Operation Affected flag(s) TO 3/4 PDF 3/4 OV 3/4 Z O AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z O AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z O AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 No operation No operation is performed. Execution continues with the next instruction. Program Counter Program Counter+1 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 Move immediate data to the accumulator The 8-bit data specified by the code is loaded into the accumulator. ACC x
Move the accumulator to data memory The contents of the accumulator are copied to the specified data memory (one of the data memories). [m] ACC
Logical OR accumulator with data memory Data in the accumulator and the specified data memory (one of the data memories) perform a bitwise logical_OR operation. The result is stored in the accumulator. ACC ACC OR [m]
Logical OR immediate data to the accumulator Data in the accumulator and the specified data perform a bitwise logical_OR operation. The result is stored in the accumulator. ACC ACC OR x
Logical OR data memory with the accumulator Data in the data memory (one of the data memories) and the accumulator perform a bitwise logical_OR operation. The result is stored in the data memory. [m] ACC OR [m]
Rev. 1.00
32
November 22, 2005
HT82K94E/HT82K94A
RET Description Operation Affected flag(s) TO 3/4 RET A,x Description Operation Affected flag(s) TO 3/4 RETI Description Operation Affected flag(s) TO 3/4 RL [m] Description Operation Affected flag(s) TO 3/4 RLA [m] Description Operation Affected flag(s) TO 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 Return from subroutine The program counter is restored from the stack. This is a 2-cycle instruction. Program Counter Stack
Return and place immediate data in the accumulator The program counter is restored from the stack and the accumulator loaded with the specified 8-bit immediate data. Program Counter Stack ACC x
Return from interrupt The program counter is restored from the stack, and interrupts are enabled by setting the EMI bit. EMI is the enable master (global) interrupt bit. Program Counter Stack EMI 1
Rotate data memory left The contents of the specified data memory are rotated 1 bit left with bit 7 rotated into bit 0. [m].(i+1) [m].i; [m].i:bit i of the data memory (i=0~6) [m].0 [m].7
Rotate data memory left and place result in the accumulator Data in the specified data memory is rotated 1 bit left with bit 7 rotated into bit 0, leaving the rotated result in the accumulator. The contents of the data memory remain unchanged. ACC.(i+1) [m].i; [m].i:bit i of the data memory (i=0~6) ACC.0 [m].7
Rev. 1.00
33
November 22, 2005
HT82K94E/HT82K94A
RLC [m] Description Operation Rotate data memory left through carry The contents of the specified data memory and the carry flag are rotated 1 bit left. Bit 7 replaces the carry bit; the original carry flag is rotated into the bit 0 position. [m].(i+1) [m].i; [m].i:bit i of the data memory (i=0~6) [m].0 C C [m].7
Affected flag(s) TO 3/4 RLCA [m] Description PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C O
Rotate left through carry and place result in the accumulator Data in the specified data memory and the carry flag are rotated 1 bit left. Bit 7 replaces the carry bit and the original carry flag is rotated into bit 0 position. The rotated result is stored in the accumulator but the contents of the data memory remain unchanged. ACC.(i+1) [m].i; [m].i:bit i of the data memory (i=0~6) ACC.0 C C [m].7
Operation
Affected flag(s) TO 3/4 RR [m] Description Operation Affected flag(s) TO 3/4 RRA [m] Description Operation Affected flag(s) TO 3/4 RRC [m] Description Operation PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C O
Rotate data memory right The contents of the specified data memory are rotated 1 bit right with bit 0 rotated to bit 7. [m].i [m].(i+1); [m].i:bit i of the data memory (i=0~6) [m].7 [m].0
Rotate right and place result in the accumulator Data in the specified data memory is rotated 1 bit right with bit 0 rotated into bit 7, leaving the rotated result in the accumulator. The contents of the data memory remain unchanged. ACC.(i) [m].(i+1); [m].i:bit i of the data memory (i=0~6) ACC.7 [m].0
Rotate data memory right through carry The contents of the specified data memory and the carry flag are together rotated 1 bit right. Bit 0 replaces the carry bit; the original carry flag is rotated into the bit 7 position. [m].i [m].(i+1); [m].i:bit i of the data memory (i=0~6) [m].7 C C [m].0
Affected flag(s) TO 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C O
Rev. 1.00
34
November 22, 2005
HT82K94E/HT82K94A
RRCA [m] Description Rotate right through carry and place result in the accumulator Data of the specified data memory and the carry flag are rotated 1 bit right. Bit 0 replaces the carry bit and the original carry flag is rotated into the bit 7 position. The rotated result is stored in the accumulator. The contents of the data memory remain unchanged. ACC.i [m].(i+1); [m].i:bit i of the data memory (i=0~6) ACC.7 C C [m].0
Operation
Affected flag(s) TO 3/4 SBC A,[m] Description Operation Affected flag(s) TO 3/4 SBCM A,[m] Description Operation Affected flag(s) TO 3/4 SDZ [m] Description PDF 3/4 OV O Z O AC O C O PDF 3/4 OV O Z O AC O C O PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C O
Subtract data memory and carry from the accumulator The contents of the specified data memory and the complement of the carry flag are subtracted from the accumulator, leaving the result in the accumulator. ACC ACC+[m]+C
Subtract data memory and carry from the accumulator The contents of the specified data memory and the complement of the carry flag are subtracted from the accumulator, leaving the result in the data memory. [m] ACC+[m]+C
Skip if decrement data memory is 0 The contents of the specified data memory are decremented by 1. If the result is 0, the next instruction is skipped. If the result is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Skip if ([m]-1)=0, [m] ([m]-1)
Operation Affected flag(s)
TO 3/4 SDZA [m] Description
PDF 3/4
OV 3/4
Z 3/4
AC 3/4
C 3/4
Decrement data memory and place result in ACC, skip if 0 The contents of the specified data memory are decremented by 1. If the result is 0, the next instruction is skipped. The result is stored in the accumulator but the data memory remains unchanged. If the result is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Skip if ([m]-1)=0, ACC ([m]-1)
Operation Affected flag(s)
TO 3/4
PDF 3/4
OV 3/4
Z 3/4
AC 3/4
C 3/4
Rev. 1.00
35
November 22, 2005
HT82K94E/HT82K94A
SET [m] Description Operation Affected flag(s) TO 3/4 SET [m]. i Description Operation Affected flag(s) TO 3/4 SIZ [m] Description PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 Set data memory Each bit of the specified data memory is set to 1. [m] FFH
Set bit of data memory Bit i of the specified data memory is set to 1. [m].i 1
Skip if increment data memory is 0 The contents of the specified data memory are incremented by 1. If the result is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Skip if ([m]+1)=0, [m] ([m]+1)
Operation Affected flag(s)
TO 3/4 SIZA [m] Description
PDF 3/4
OV 3/4
Z 3/4
AC 3/4
C 3/4
Increment data memory and place result in ACC, skip if 0 The contents of the specified data memory are incremented by 1. If the result is 0, the next instruction is skipped and the result is stored in the accumulator. The data memory remains unchanged. If the result is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Skip if ([m]+1)=0, ACC ([m]+1)
Operation Affected flag(s)
TO 3/4 SNZ [m].i Description
PDF 3/4
OV 3/4
Z 3/4
AC 3/4
C 3/4
Skip if bit i of the data memory is not 0 If bit i of the specified data memory is not 0, the next instruction is skipped. If bit i of the data memory is not 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Skip if [m].i0
Operation Affected flag(s)
TO 3/4
PDF 3/4
OV 3/4
Z 3/4
AC 3/4
C 3/4
Rev. 1.00
36
November 22, 2005
HT82K94E/HT82K94A
SUB A,[m] Description Operation Affected flag(s) TO 3/4 SUBM A,[m] Description Operation Affected flag(s) TO 3/4 SUB A,x Description Operation Affected flag(s) TO 3/4 SWAP [m] Description Operation Affected flag(s) TO 3/4 SWAPA [m] Description Operation Affected flag(s) TO 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 PDF 3/4 OV O Z O AC O C O PDF 3/4 OV O Z O AC O C O PDF 3/4 OV O Z O AC O C O Subtract data memory from the accumulator The specified data memory is subtracted from the contents of the accumulator, leaving the result in the accumulator. ACC ACC+[m]+1
Subtract data memory from the accumulator The specified data memory is subtracted from the contents of the accumulator, leaving the result in the data memory. [m] ACC+[m]+1
Subtract immediate data from the accumulator The immediate data specified by the code is subtracted from the contents of the accumulator, leaving the result in the accumulator. ACC ACC+x+1
Swap nibbles within the data memory The low-order and high-order nibbles of the specified data memory (1 of the data memories) are interchanged. [m].3~[m].0 [m].7~[m].4
Swap data memory and place result in the accumulator The low-order and high-order nibbles of the specified data memory are interchanged, writing the result to the accumulator. The contents of the data memory remain unchanged. ACC.3~ACC.0 [m].7~[m].4 ACC.7~ACC.4 [m].3~[m].0
Rev. 1.00
37
November 22, 2005
HT82K94E/HT82K94A
SZ [m] Description Skip if data memory is 0 If the contents of the specified data memory are 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Skip if [m]=0
Operation Affected flag(s)
TO 3/4 SZA [m] Description
PDF 3/4
OV 3/4
Z 3/4
AC 3/4
C 3/4
Move data memory to ACC, skip if 0 The contents of the specified data memory are copied to the accumulator. If the contents is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Skip if [m]=0
Operation Affected flag(s)
TO 3/4 SZ [m].i Description
PDF 3/4
OV 3/4
Z 3/4
AC 3/4
C 3/4
Skip if bit i of the data memory is 0 If bit i of the specified data memory is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Skip if [m].i=0
Operation Affected flag(s)
TO 3/4 TABRDC [m] Description Operation Affected flag(s) TO 3/4 TABRDC [m] Description Operation Affected flag(s) TO 3/4
PDF 3/4
OV 3/4
Z 3/4
AC 3/4
C 3/4
Move the ROM code (locate by TBLP and TBHP) to TBLH and data memory (ROM code TBHP is enabled) The low byte of ROM code addressed by the table pointer (TBLP and TBHP) is moved to the specified data memory and the high byte transferred to TBLH directly. [m] ROM code (low byte) TBLH ROM code (high byte)
PDF 3/4
OV 3/4
Z 3/4
AC 3/4
C 3/4
Move the ROM code (current page) to TBLH and data memory (ROM code TBHP is disabled) The low byte of ROM code (current page) addressed by the table pointer (TBLP) is moved to the specified data memory and the high byte transferred to TBLH directly. [m] ROM code (low byte) TBLH ROM code (high byte)
PDF 3/4
OV 3/4
Z 3/4
AC 3/4
C 3/4
Rev. 1.00
38
November 22, 2005
HT82K94E/HT82K94A
TABRDL [m] Description Operation Affected flag(s) TO 3/4 XOR A,[m] Description Operation Affected flag(s) TO 3/4 XORM A,[m] Description Operation Affected flag(s) TO 3/4 XOR A,x Description Operation Affected flag(s) TO 3/4 PDF 3/4 OV 3/4 Z O AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z O AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z O AC 3/4 C 3/4 PDF 3/4 OV 3/4 Z 3/4 AC 3/4 C 3/4 Move the ROM code (last page) to TBLH and data memory The low byte of ROM code (last page) addressed by the table pointer (TBLP) is moved to the data memory and the high byte transferred to TBLH directly. [m] ROM code (low byte) TBLH ROM code (high byte)
Logical XOR accumulator with data memory Data in the accumulator and the indicated data memory perform a bitwise logical Exclusive_OR operation and the result is stored in the accumulator. ACC ACC XOR [m]
Logical XOR data memory with the accumulator Data in the indicated data memory and the accumulator perform a bitwise logical Exclusive_OR operation. The result is stored in the data memory. The 0 flag is affected. [m] ACC XOR [m]
Logical XOR immediate data to the accumulator Data in the accumulator and the specified data perform a bitwise logical Exclusive_OR operation. The result is stored in the accumulator. The 0 flag is affected. ACC ACC XOR x
Rev. 1.00
39
November 22, 2005
HT82K94E/HT82K94A
Package Information
40-pin DIP (600mil) Outline Dimensions
A 40 B 1 20 21
H C D E F G a I
Symbol A B C D E F G H I a
Dimensions in mil Min. 2045 535 145 125 16 50 3/4 595 635 0 Nom. 3/4 3/4 3/4 3/4 3/4 3/4 100 3/4 3/4 3/4 Max. 2065 555 155 145 20 70 3/4 615 670 15
Rev. 1.00
40
November 22, 2005
HT82K94E/HT82K94A
48-pin SSOP (300mil) Outline Dimensions
48 A
25 B
1 C C'
24
G H a F
D E
Symbol A B C C D E F G H a
Dimensions in mil Min. 395 291 8 613 85 3/4 4 25 4 0 Nom. 3/4 3/4 3/4 3/4 3/4 25 3/4 3/4 3/4 3/4 Max. 420 299 12 637 99 3/4 10 35 12 8
Rev. 1.00
41
November 22, 2005
HT82K94E/HT82K94A
Product Tape and Reel Specifications
Reel Dimensions
T2 D
A
B
C
T1
SSOP 48W Symbol A B C D T1 T2 Description Reel Outer Diameter Reel Inner Diameter Spindle Hole Diameter Key Slit Width Space Between Flange Reel Thickness Dimensions in mm 3301 1000.1 13+0.5 -0.2 20.5 32.2+0.3 -0.2 38.20.2
Rev. 1.00
42
November 22, 2005
HT82K94E/HT82K94A
Carrier Tape Dimensions
D
E F W C
P0
P1
t
B0
D1
P
K0 A0
SSOP 48W Symbol W P E F D D1 P0 P1 A0 B0 K1 K2 t C Description Carrier Tape Width Cavity Pitch Perforation Position Cavity to Perforation (Width Direction) Perforation Diameter Cavity Hole Diameter Perforation Pitch Cavity to Perforation (Length Direction) Cavity Length Cavity Width Cavity Depth Cavity Depth Carrier Tape Thickness Cover Tape Width Dimensions in mm 320.3 160.1 1.750.1 14.20.1 2 Min. 1.5+0.25 40.1 20.1 120.1 16.20.1 2.40.1 3.20.1 0.350.05 25.5
Rev. 1.00
43
November 22, 2005
HT82K94E/HT82K94A
Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Taipei Sales Office) 4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan Tel: 886-2-2655-7070 Fax: 886-2-2655-7373 Fax: 886-2-2655-7383 (International sales hotline) Holtek Semiconductor Inc. (Shanghai Sales Office) 7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China 200233 Tel: 021-6485-5560 Fax: 021-6485-0313 http://www.holtek.com.cn Holtek Semiconductor Inc. (Shenzhen Sales Office) 43F, SEG Plaza, Shen Nan Zhong Road, Shenzhen, China 518031 Tel: 0755-8346-5589 Fax: 0755-8346-5590 ISDN: 0755-8346-5591 Holtek Semiconductor Inc. (Beijing Sales Office) Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031 Tel: 010-6641-0030, 6641-7751, 6641-7752 Fax: 010-6641-0125 Holmate Semiconductor, Inc. (North America Sales Office) 46712 Fremont Blvd., Fremont, CA 94538 Tel: 510-252-9880 Fax: 510-252-9885 http://www.holmate.com Copyright O 2005 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holteks products are not authorized for use as critical components in life support devices or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw.
Rev. 1.00
44
November 22, 2005

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