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IZ1229 10-DIGITS CALCULATOR
The IZ1229 is a single chip CMOS LSI with 10-digit arithmetic operation , single memory, extraction-of-square-root, percentage calculation, auto power off and punctuation and touch tone function, designed for FEM LCD operation with a 1.5V power supply.
FUNCTIONS * Four standard functions (+, -, x, / ) * Square and reciprocal calculations * Extraction of square root * Auto constant calculations (constant: multiplicand, divisor, addend and subtrahend) * Mark-up and mark-down calculations * Percentage calculations * Chain multiplication and division * Power calculations * Rough estimate calculations * Punctuation comma and touch tone mark display * Clear key: ON/C, CE * Touch tone function
FEATURES * Single chip CMOS construction * Floating decimal point * LCD direct drive * Overflow indication: "E" * On chip oscillator components * Auto Power off * Accumulating memory: M+, M-, MR, MC, MRC * Bare chip is available Direct type
LCD CONNECTION
H2 H3 a11 c10 b10 a10 c9 b9 a9 c8 b8 a8 c7 b7 a7 c6 b6 a6 c5 b5 a5 c4 b4 a4 c3 b3 a3 c2 b2 a2 c1 b1 a1 H1
ABSOLUTE MAXIMUM RATINGS ( Ta = 25oC ) Characteristic Terminal Voltage Operating Temperature Storage Temperature Symbol VCC VIN Ta Tstg Value - 0.3 ~ + 2.1 - 0.3 ~ VCC + 0.3 0 ~ + 50 - 55 ~ + 125 Unit V V o C o C
1
IZ1229
ELECTRICAL CHARACTERISTICS (Ta = 25oC, VCC = 1.5V, unless otherwise specified)
Characteristic Operating Voltage Input Voltage (pins FDISB, EXT) Input Current 1 (pins FDISB, EXT) Input Current 2 (pins K4 / K6) Output Voltage (pins a1/a11, b1/b10, c1/c10, H1/H3) Display Frequency Touch Tone Output Drive Current Supply Current
Symbol VOP VIH VIL IIH1 IIL1 IIH2 IIL2 VOA VOB VOC Fd IOH IOL IOFF IDIS
Test Condition
Min 1.1 VCC - 0.4
Typ 1.5
Max 1.8
Unit V V
0.4 VIN = VCC VIN = 0V VIN = VCC; APODISB = 0V VIN = 0V; FDISB = 0V Without load Without load Without load VCC = 1.3V, Display is on VOH =1.0V, APODISB = 0V, FDISB = 0V VOL =0.5V, APODISB = 0V, FDISB = 1.5V Display is off VCC = 1.3V, Ddisplay is on 1 3 1 3 2.80 1.30 5.5 2.95 1.50 0 75 2 2 1 10 A 7.5 1.70 0.20 Hz mA V A A
1.5
2.5
55 1.3 1.3
6
2
IZ1229
FUNCTIONAL DESCRIPTION Decimal point system Complete floating decimal point system. Integral number 10 digits leading zero suppression. Zero shift. Symbols - : negative number display E : error display , : punctuation comma : touch tone indicator Error detections * System errors occur when: 1) The division by zero. 2) The extraction of square root of a negative number. 3) The integral part of any memory calculation result exceeds 10 digits. * Rough estimate calculation error occur when The integral part of any calculation - any standard functions, percentage, square root, reciprocal or power calculations result exceeds 10 digits. Error indication * System error "0" is indicated in the 1-digit position and "E" in the sign-digit position. * Rough estimate calculation error The high-order 10-digit calculation result is indicated together with "E". -10 The decimal point is indicated if the position corresponding to a calculation result of time 10 , and no zero shift is performed Error release * System error A system error can be release by the ON/C key. * Rough estimate calculation error ON/C key can release a rough estimate-calculation error and clear calculation result at once. CE key can release only a rough estimate calculation error ("E" flag). Number entry Numericals can be entered up to 10 digits. Numerical entries equal to 11 digits or more are ignored. Memory protection In any error detection, the memory contents present before the error detection are protected. Memory indication If the memory content is not zero, "M" is indicated in the sign-digit position.
3
IZ1229
Key bounce protection Front edge Minimum 3 words Trailing edge Minimum 16 words 1 word is 3.3ms when display frequency is Fd = 100Hz. Auto power OFF Power automatically turns off after 7 - 8 minutes pass from the last key pressure. By connecting the APODISB pin to GND or VCC, the auto power off function is disabled or enabled, respectively.
,
H1 H2 H3
a11
,
,
,
,
,
,
H2 H3
c10 b10a10 c9 b9a9 c8 b8a8 c7 b7a7 c6 b6a6 c5 b5a5 c4 b4a4 c3 b3a3 c2 b2a2 c1 b1a1
Direct LCD with IZ1229
TOUCH TONE (
) KEY
* When power is ON, the touch tone function is enable and the beep sound with f=2KHz is generated output during 125ms and sign is displayed on LCD. * Selection of touch tone function is toggled by touch tone key. CLEAR KEY DESCRIPTION ON/C key * Power-on function. * All operations are cleared by the ON/C key (except memory contents). CE key * CE key can edit the last operand or operator. MARK-UP AND MARK-DOWN CALCULATION
ENTRY A +/B % A x B % + OR = A A B A AM/100 DISPLAY A A B AM/100 AM/100 A + AM/100 OR A - AM/100
Note: AM: AMOUNT
4
8a
8b
8c
9a
9b
9c
01 a
01 b
01c
1
2
3
0
. .
RM
=
EC
4K
4
5
6
.
x
-M
CR M
-
5K
7
8
9
%
+
+M
CM
-/ +
FF O
6K
1b
1c
2a 2b 2c 3a 3b 3c 4a 4b 4c 5a 5b
AV CV DNG
2H
)PIHC( 9221ZI
3H
11 a 01c 01 b 01 a 9c
5c
6a
6b
6c
7a
7b
7c
8a
8b
8c
9a
9b
7c ~1 c ,7 b~ 1b , 7a ~1 a
01c ~8c , 01b ~8 b ,1 1a ~8 a
1H
12
9
APPLICATION CIRCUIT (direct LCD)
IZ1229
F
33
V5.1 +
C/NO
ccV
1a
1H
C/NO 3K 4 K
5K
6K OPA
DF
TXE
pR OP 1D RE ZZU B O ZEI P
BV
F 1.0 F 1.0 2D
ccV
3H ,2H 2
NOTE1:
D1, D2: Protection Diode Rp : Protection Resistor (0.5 ~1.5K)
APODISB APO STATE
5
VCC ENABLE AUTO POWER OFF CONDITION GND DISABLE
IZ1229
PAD DIAGRAM
52 62 11 72 82 92 8 03 13 )0,0 ( 6 23 5 33 4 43 53 3 63 2 73 83
PAD LOCATION
Pad No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Pad Name PO EXT FDIS APOD K6 K5 K4 ON/C VCC H1 a1 b1 c1 a2 b2 c2 a3 b3 c3 a4 b4 c4 a5 b5 Description Piezo Output External Clock FOSC Disable APO Disable Key input Key input Key input Key Input Power Supply COM1 Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output X -1124 -939 -759 -541 -329 -149 31 211 411 591 841 1061 1161 1161 1161 1161 1161 1161 1161 1161 1161 1161 1161 1161 Y -1181 -1236 -1236 -1236 -1236 -1236 -1236 -1236 -1236 -1236 -1236 -1236 -1076 -916 -746 -461 -276 -66 134 294 484 654 844 1034 Pad No 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 Pad Name c5 a6 b6 c6 a7 b7 c7 a8 b8 c8 a9 b9 c9 a10 b10 c10 a11 H3 H2 GND VC VA VB Description Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output COM3 COM2 Ground Capacitor terminal Capacitor terminal Capacitor terminal X 981 816 646 361 196 36 -134 -294 -474 -639 -819 -984 -1149 -1169 -1169 -1169 -1169 -1169 -1169 -1169 -1169 -1169 -1169 Y 1244 1244 1244 1244 1244 1244 1244 1244 1244 1244 1244 1244 1224 1074 919 759 594 434 209 -36 -306 -611 -866
APO: Output Power OFF
42 12 32 22 02 91 81 71 61 51 41 31 21 01 9
m: tinU 001 x 001 : ezis daP 0472 x 0952 :ezis pihC MARGAID DAP 9221ZI
7
1
34
93 14 44 54 64 74 04 24
6

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