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NJU6061
Full Color LED Controller Driver with PWM Control
GENERAL DESCRIPTION
The NJU6061 is a full color LED controller driver. It can control and drive a 3 in 1 packaged (Red, Green and Blue) LED. The NJU6061 contains PWM luminance (Pulse Width Modulation) control circuit , LED driving circuit, MPU interface and so on. The PWM signal control the duty cycle of each RGB LED delicately, therefore can realize a lot of colors. The Sweep Operation function can simplify the LED brightness control. The Brightness Correction function can fake a linear change of the LED brightness in human eyes. Enable terminal (ON/OFF) is possible to synchronize with a sound source etc. It requires only four external components such as three resistors for LED current adjustment and one for oscillation, which enables the NJU6061 to save PCB space. The NJU6061 can be cascaded and controlled at the same time. NJU6061 is suitable for cellular phone, car audio and so on.
PACKAGE OUTLINE
NJU6061PB1
NJU6061V
FEATURES
Controlling a 3-in-1 packaged RGB LED Built-in PWM luminance control Built-in 8bit serial interface circuit Cascade connect Sweep operation function Brightness correction Built-in oscillation circuit Operating voltage Package CMOS Technology ILED=30mA x 3 16 steps x 3 (Internal 128 steps x 3)
1.7V to 5.5V FFP12(2.0*2.0*0.85mm), SSOP14
Ver.2004-12-22
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NJU6061
PIN CONNECTIONS (TOP VIEW)
LED1
LED3
LED2
NC VDD VDD VSS LED3 EN RSTb OSC LED2 LED1 VSS OSC CS CLK DATA
EN RSTb CS CLK DATA NC DATAOUT
DATAOUT
PIN DESCRIPTIONS
PIN No. FFP12 SSOP14 1 2 3 4 5 6 7 8 9 10 11 12 12 11 10 8 7 6 5 4 3 2 14 13 1,9 PIN NAME TYPE DESCRIPTIONS Chip Select terminal When CS terminal is "L", the DATA terminal is in output state. At the rising edge of CS signal, if CLK="H", the DATA terminal is in input state. The serial data is latched on at the falling edge of CS clock. Shift Clock terminal Serial Data terminal Serial Data Output terminal (for cascade connection) Oscillating terminal Connecting a External resistor Ground terminal LED Connect terminals (Open drain output) Output level can be divided into 16 steps by PWM signal. Connecting with the cathode of LED. VDD Power Supply terminal Enable terminal "H" : LED ON "L" : LED OFF Reset terminal - Active "L". Non Connect These terminals are electrically open.
CS CLK DATA DATAOUT OSC VSS LED1 LED2 LED3 VDD EN RSTb NC
Input Input Input / Output Output Input Power Output Output Output Power Input Input
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NJU6061
BLOCK DIAGRAM
1.7 to 5.5V OSC Program Register 128 step PWM Driver 30mA EN
3.6 to 6.0V
OSC VDD
LED1
Program Register M P U RSTb CS CLK DATA VSS DATAOUT I / F Instruction Decoder Program Register
128 step PWM
Driver 30mA
LED2
128 step PWM
Driver 30mA
LED3
FUNCTIONAL DESCRIPTIONS
(1) Description for Each Blocks (1-1) PWM Luminance Control The NJU6061 incorporates three 128 steps PWM Luminance Control circuits. The relationship between PWM duty cycle and the register value is shown as below:
REGISTER 0,0,0,0 0,0,0,1 0,0,1,0 0,0,1,1 0,1,0,0 0,1,0,1 0,1,1,0 0,1,1,1 DUTY 0/128 1/128 2/128 3/128 5/128 8/128 13/128 19/128 REGISTER 1,0,0,0 1,0,0,1 1,0,1,0 1,0,1,1 1,1,0,0 1,1,0,1 1,1,1,0 1,1,1,1 DUTY 27/128 36/128 46/128 59/128 73/128 90/128 108/128 128/128
(1-2) Oscillator The oscillation circuit with the external register generates the clock signal for PWM. The PWM frequency (fPWM) can be finely adjusted by the external resistor. In addition, the oscillation circuit can be turned on/off by the instruction to minimize the current consumption. If not zero PWM signal is still output after the oscillation circuit OFF, write 0/128 (0,0,0,0) into the register or let EN ="L".
(1-3) Enable function The enable terminal (EN terminal) is used to turn on/off the device from the external. The register value does not change by this signal. When EN terminal is not used, connect this terminal to VDD.
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NJU6061
(1-4) Brightness Correction Even if the change of the brightness of LED is linear, human eyes receive a curve change. The built-in brightness correction function can rectify the difference between actual LED luminance and its appearance. According to the following compensation curve, 16 steps are selected from 128 steps PWM. And the nonlinear luminance characteristic of LED is rectified so that it becomes linear by appearance.
Brightness Correction (16step)
128 112 96 Internal PWM Value 80 64 48 32 16 0 0 3 6 Set Value 9 12 15
The sequency of PWM set: (Not use Sweep Function)
Frame Frequency Set Sweep Function Select
(0,0,0,0, 0,0,0,1) (0,0,1,0, 0,0,0,0)
Set the Oscillation circuit. Set "Not use Sweep Function".
PWM Data Set
(0,1,1,0, *,*,*,*) (0,1,1,1, *,*,*,*) (1,0,0,0, *,*,*,*)
Execute
Set the 16-step PWM data. PWM waveform changes as soon as the PWM data is set. (*:PWM data value)
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NJU6061
Bt staggering the output waveforms' phases, allowable dissipation of LED package can be reduced. The LED brightness can be selected from 16 levels (0 to 15) by Brightness Correction function.
LED1 terminal LED2 terminal LED3 terminal
1-frame
LED1 terminal
LED2 terminal
LED3 terminal 1/128step 5uS(200kHz)
0.64mS(1.56kHz) 1-frame 1.92mS(520Hz) fosc=400kHz, Frame Frequency Set D1=0
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NJU6061
(1-5) Sweep Function The Sweep Function allows a smooth color-changing of RGB LEDs. By setting up the initial value, counter number, sweep direction and stepping time, adjusted PWM data can realize a smoothly color-changing. At the end of the program, the NJU6061 will send request signal to CPU and the DATA pin is pulled low, PWM value at the last count will be maintained and outputted.
REQ signal REQ signal REQ signal
PWM value
Stop UP Start Point Variable Value * Stepping Time Stepping Time
HALT DOWN
t
Frame Frequency Set Sweep Function Sweep Direction / Stepping Time
(0,0,0,0, 0,0,0,1)
Set the Oscillation circuit. Set "Use Sweep Function". Set Sweep Direction / Stepping Time
(0,0,1,0, 0,1,1,1)
(0,0,1,1, *,*,*,*) (0,1,0,0, *,*,*,*) (0,1,0,1, *,*,*,*) (0,1,1,0, *,*,*,*) (0,1,1,1, *,*,*,*) (1,0,0,0, *,*,*,*)
PWM Data Set
Set Start Point (initial value)
Counter Number
(1,0,0,1, *,*,*,*) (1,0,1,0, *,*,*,*) (1,0,1,1, *,*,*,*) (1,1,0,0, 0,1,1,1)
Set Counter Number
Sweep Execute Detect REQ signal Read Flag
Outputs PWM waveform corresponding to the setup value At the end of the program, CPU will detect the request signal from the device and identify which port
sending the request signal
To Next Sweep
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(2) Instructions The data transfer between CPU and NJU6061 is via a 3-wire serial interface. Synchronized with CLK, the input data is latched on at the falling edge of CS signal, The MSB (D) is first. Table.1 shows the instruction codes of the NJU6061. Table 1. Instruction Code Code D5 D4 D3 D2 D1 0 0 * * * 0 1 * * 0/1
Instruction a b NOP Frame Frequency Set
D7 0 0
D6 0 0
D0 * 0/1
Description
Non Operation code OSC ON/OFF D0=1:ON, D0=0:OFF Frame Frequency select D1=1:fosc/(256*3), D1=0: fosc/(512*3) Sweep Function LED1:D0=1: Enable, D0=0:Disable LED2:D1=1: Enable, D1=0:Disable LED3:D2=1: Enable, D2=0:Disable
c
Sweep Function Select LED1 Sweep Direction / Stepping Time LED2 Sweep Direction / Stepping Time LED3 Sweep Direction / Stepping Time LED1 PWM Data Set LED2 PWM Data Set LED3 PWM Data Set LED1 Counter Number Set LED2 Counter Number Set LED3 Counter Number Set Sweep Execute
Reset
0 0 0 0 0 0 1 1 1 1 1 1 1 1
0 0 1 1 1 1 0 0 0 0 1 1 1 1
1 1 0 0 1 1 0 0 1 1 0 0 1 1
0 1 0 1 0 1 0 1 0 1 0 1 0 1
*
0/1
0/1
0/1
Direction Direction Direction
Time Time Time
Set up sweep direction and stepping time
d
PWM Data / Start Point PWM Data / Start Point PWM Data / Start Point Variable Value Variable Value Variable Value * * 0/1 0/1 0/1 *
Execute the Sweep Function LED1:D0=1: Execute, D0=0:Stop LED2:D1=1: Execute, D1=0:Stop LED3:D2=1: Execute, D2=0:Stop Initialize the internal circuits Inhibited command Set Counter Number when Sweep Function enabled 4-bit PWM data is set. /Set Start Point when Sweep Function enabled
e
f
g h i
Test
* * Test Data Test Data
* : Don't Care
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NJU6061
(2-1) Explanation of Instruction Code (a) NOP This instruction is Non Operating code. D7 0 D6 0 D5 0 D4 0 D3 * D2 * D1 * D0 *
(b) Frame Frequency Set
This instruction set the PWM frame frequency and oscillator ON/OFF. D7 0 D6 0 D5 0 D4 1 D3 * D2 * D1 fPWM D0 OSC
OSC ON/OFF D0 0 : Oscillator OFF(Default) 1 : Oscillator ON PWM Frequency set D1 0 : fosc / (256*3) frequency(Default) 1 : fosc / (512*3) frequency
(c) Sweep Function Select
This instruction is used to select Sweep Function for each LED. D7 0 D6 0 D5 1 D4 0 D3 * D2
LED3
D1
LED2
D0
LED1
D0 0 : LED1 Sweep Function Disable 1 : LED1 Sweep Function Enable D1 0 : LED2 Sweep Function Disable 1 : LED2 Sweep Function Enable D2 0 : LED3 Sweep Function Disable 1 : LED3 Sweep Function Enable
(d) LED1 to 3 Sweep Direction/ Stepping Time This instruction set the Sweep Direction/ Stepping Time to each LED when Sweep Function active. LED1 Sweep Direction/ Stepping Time Set D7 D6 D5 D4 D3 D2 Direction 0 0 1 1 LED2 Sweep Direction/ Stepping Time Set D7 D6 D5 D4 D3 D2 Direction 0 1 0 0 LED3 Sweep Direction/ Stepping Time Set D7 D6 D5 D4 D3 D2 Direction 0 1 0 1 D3 0 0 1 1 D2 0 1 0 1 Direction HALT UP DOWN Prohibit
D1 D0 Time D1 D0 Time D1 D0 Time D1 0 0 1 1 D0 0 1 0 1 Time 8-frame (15.36ms) 16-frame (30.72ms) 24-frame (46.08ms) 32-frame (61.44ms)
fosc=400kHz, Frame Frequency Set D1=0
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NJU6061
(e) LED1 to 3 PWM Data Set This instruction set the PWM duty cycle. When the data is set up, the output will change from the next frame. If using Sweep function, initialization will be executed. LED1 PWM Data Set D7 D6 D5 0 1 1 LED2 PWM Data Set D7 D6 D5 0 1 1 LED3 PWM Data Set D7 D6 D5 1 0 0
D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1
D4 0 D4 1 D4 0
D3 D2 D1 D0 PWM Data / Start Point D3 D2 D1 D0 PWM Data / Start Point D3 D2 D1 D0 PWM Data / Start Point
D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 PWM DUTY 0/128 1/128 2/128 3/128 5/128 8/128 13/128 19/128 27/128 36/128 46/128 59/128 73/128 90/128 108/128 128/128
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NJU6061
(f) LED1 to 3 Counter Number This instruction set the counter number when using the Sweep Function. LED1 PWM Data Set D6 D5 D7 1 0 0 LED2 PWM Data Set D7 D6 D5 1 0 1 LED3 PWM Data Set D7 D6 D5 1 0 1
D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1
D4 1 D4 0 D4 1
D3
D2 D1 D0 Counter Number D2 D1 D0 Counter Number D2 D1 D0 Counter Number
Counter Number 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
D3
D3
D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
If the counter number plus the PWM value(=PWM3-0) of the start point is larger than 15, after counting up to the maximum/minimum PWM value, PWM value will return to the minimum or maximum value, and count up again until the counting is over. Ex.) Start point PWM value Counter Number 12 Sweep Direction 8 (27/128 duty) UP
PWM Value
15(Max)
9 8
Start Point
Variable Value 12 Stop Point
4
0
t
8(Start) 9 (Count up) 15 (Max) 0 (Min) 4 (Stop)
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NJU6061
(g) Sweep Execute At the end of the program, as a request signal to CPU, the DATA pin becomes low, PWM value will be maintained as in the last count. D7 1 D6 1 D5 0 D4 0 D3 * D2
LED3
D1
LED2
D0
LED1
(*:Don't Care)
LED1:D0 LED2:D1 LED3:D2
0 : Stop 1 : Execute 0 : Stop 1 : Execute 0 : Stop 1 : Execute
(h) Reset Different from hardware reset, using reset instruction can initialize the device too. When power ON, hardware reset should be executed D7 1 D6 1 D5 0 D4 1 D3 1 D2 1 D1 1 D0 1
Reset status using the Reset instruction 1, fPWM 0: fosc/(256*3) 2, OSC 0: Oscillation OFF 3, Sweep Function Disable 4, Sweep Direction 0,0: HALT 5, Stepping Time 0,0: 8-frame 6, PWM data 0,0,0,0: 0/128 7, Counter Number 0,0,0,0 8, Sweep Execute Stop
(i)
Testing This instruction is used only for device testing by the manufacturer. If use this instruction by mistake, reset data again for an ordinary operation, To use reset instruction or input "L" into RSTb pin can make the testing mode ineffective D7 1 D7 1
D3 0
D6 1 D6 1
D2 0
D5 1 D5 1
D1 0
D4 0 D4 1
D3
D2 D1 Test Data D2 D1 Test Data
Test Data Normal mode
D0
D3
D0
D0 0
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NJU6061
(3) Using Sweep Function PWM program is enabled by setting D2-D0 of Sweep Function Select instruction to 1. The Sweep Function start to work by setting D2-D0 of Sweep Execute instruction to 1. When program is executed, the value of D2-D0 will become 0 After the execution of the program, DATA pin output "L" as a request signal at the last frame of PWM signal. CPU will detect from which LED port this request signal is sent out, and start to set next PWM program for this LED. And the request signal can be outputted until the next Sweep Execution instruction is set up or the sweep function is halted. Setting 0 to D2-D0 of the Sweep Function Select, the sweep function will be halted, and request signal is canceled. During the program execution, sweep direction, stepping time, PWM data, and counter number can not be changed. Example) LED output pin PWM program for LED1
PWM program execution PWM output The next PWM Program.
Initial PWM data output
The last PWM data output
LED1
1 frame
Sweep Function Select Instruction (LED1)
The D1 become 0 when the program is executed.
128/Fosc
CS
SCK
Data input Read out the port flag Data input
DATA
The end of the program Even if the data readout is executed, set D0 of Sweep Function to 1, and D0 of Sweep Execute to 0, the request signal will be sent out in the next frame.
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NJU6061
(4) Data Input Timing Data format is shown below. When CS="L", I/F is in output state. If the CS = "H" and CLK="H", I/F is in input state CS CLK DATA
DATA terminal status
*
Out
D7
D6
D5
D4
In
D3
D2
D1
D0
*
Out
Note1) Data is read into the internal shift register at the rising edge of CLK. Note2) The contents of the shift register are read into the internal instruction decoder circuit at the falling edge of CS.
note3) An instruction or PWM data shall be 8 bits. In case of entering over than 8 bits data, valid data is last 8 bits data.
The rest data is outputted from DATAOUT pin.
(4-1) Cascade Connect DATAOUT pin can be cascaded. As shown in the flowing application circuit, several NJU6061s are connected and the data from CPU are latched up at the falling edge CS signal. DATAOUT pin only output signal. The request signal from the second NJU6061 can not be read out. Example) Connect three NJU6061s NJU6061-(1)
DATA DATA OUT
CPU DATA CS CLK
NJU6061-(2)
DATA DATA OUT
NJU6061-(3)
DATA DATA OUT
CS CLK DATA * D7
***
D0
D7
***
D0
D7
***
D0
*
NJU6061-(3)
DATA terminal status DATAOUT terminal status
NJU6061-(2)
NJU6061-(1)
Out Z
In Out
Out Z
Z : Hi-Impedance
Note 1) In cascade connection, be sure to input a 8 x NJU6061 quantity bits data length, if less than this, the previous data will be input
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NJU6061
(5) Data Output Timing The data output format shows bellow. At the rising edge of CS, if CLK="L", data is outputted. CS CLK
DATA
*
LED1 LED2
LED3
Port Flag
DATA Out terminal status
Out
Out
If more than 5 clocks is input, LED3 port flag will be hold. After the port flag is read out, the request signal becomes "H". When D2-D0 of Sweep Function instruction are "1", and D2-D0 of Sweep Execute are "0", the request signal synchronize with frame signal and become "L". When request signal ="H", all outputs are "H". If the continuous readout occurred within the frame, from the second readout, "H" are output.
(5-1) Port Flag (LED1~LED3) When Sweep function is over, these flags are set to "1".
(6) Reset Circuit The device is initialized by inputting a more than 400ns long signal into the RES terminal. Instruction can be input after 100 ns away from the rising edge of the reset signal, Reset status using the RES terminal 1, fPWM 0: fosc/(256*3) 2, OSC 0: Oscillation OFF 3, Sweep Function Disable 4, Sweep Direction 0,0: HALT 5, Stepping Time 0,0: 8-frame 6, PWM data 0,0,0,0: 0/128 7, Variable Value 0,0,0,0 8, Sweep Execute Stop
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NJU6061
ABSOLUTE MAXIMUMN RATINGS
Ta=25C
PARAMETERS VDD Power Supply Driver Off Break Down Voltage Driver On Break Down Voltage Input Voltage Power Dissipation Operating Temperature Storage Temperature SYMBOL CONDITIONS VDD terminal LED1, LED2, LED3 terminals LED1, LED2, LED3 terminals CSb, DATA, CLK, RSTb, OSC, EN Terminals Ta=25C FFP12 SSOP14 RATINGS -0.3 to +7.0 7.0 5.5 -0.3 to VDD+0.3 TBD 250 -40 to +85 -55 to +125 UNIT V V V V mW C C
VDD Voffmax Vonmax VIN1 Pdmax Topr Tstg
Note1) Note2)
VSS = 0V to all conditions If the LSI was used out of the absolute maximum ratings, LSI is damaged completely and the riliability become poor. The LSI is used on the electrical characteristics is recommended strongly for normal operation.
DC ELECTRICAL CHARACTERISTICS
VDD=1.7 to 5.5V, Ta=-40 to 85C
PARAMETERS VDD Power Supply Input "H" Level Voltage Input "L" Level Voltage Input "H" Level Current Input "L" Level Current Output Off Leak Current 3-state Leak Current Output "H" Level Voltage(1) Output "L" Level Voltage(1) Output "L" Level Voltage(2) Output "L" Level Voltage(3) Pull-up Resistance Current Oscillation Frequency Operating Current SYMBOL CONDITIONS RSTb, CSb, CLK, DATA, EN RSTb, CSb, CLK, DATA, EN RSTb, CSb, CLK, DATA, EN VIN= VDD RSTb, CSb, CLK, DATA, EN VIN=0V LED1, LED2, LED3: VO=5.5V, EN=0V DATA, DATAOUT DATA, DATAOUT, Io=-0.1mA DATA, DATAOUT Io=0.1mA LED1, LED2. LED3, IO=10mA, VDD=1.7V LED1, LED2. LED3, IO=30mA, VDD=3.0V DATA VDD=3V VDD=3V, ROSC=82k, Ta=25C VDD =3V, PWM DUTY: 27/128, Output terminal open, ROSC=82k, Ta=25C MIN. TYP. MAX. Unit
VDD VIH VIL IIH IIL IOFFH ITSL VOH(1) VOL(1) VOL(2) VOL(3) -Ip fOSC IDD
1.7 0.8VDD 0
5.5 VDD 0.2VDD 5.0
V V V A A
-5.0 6.0 -4.0 0.8VDD 2.0 0.2VDD 0.5 0.5 10 280 25 400 100 50 520 200
A A V V V V A kHz A
Note1):
Input Terminal Structure
VDD VDD VDD In ENABLE ENABLE Out Tri-State Tri-State
RSTb, CS, CLK
EN
DATA
DATAOUT
LED1 to 3
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NJU6061
AC ELECTRICAL CHARACTERISTICS
VDD=2.4 to 5.5V, Ta=-40 to 85C
PARAMETERS "L" Level CLK Clock Width "H" Level CLK Clock Width Data Set-Up Time Data Hold Time CS Wait Time CSb Set-Up Time CSb Hold Time CSb "L" Level Width Output Delay Time DATA Rise Time DATAOUT Enable Time DATAOUT Disable Time LED Enable Time LED Disable Time RESET "L" Level Width RESET Time Rising Time Falling Time SYMBOL Terminal CLK CLK CLK, DATA CLK, DATA CS, CLK CS, CLK CS, CLK CS DATA, DATAOUT CL=10pF DATA CL=10pF DATAOUT CL=10pF, RL=10k DATAOUT CL=10pF, RL=10k LED1, LED2, LED3, EN CL=10pF, RL=10k LED1, LED2, LED3, EN CL=10pF, RL=10k RSTb RSTb CS, CLK, DATA, RSTb CS, CLK, DATA, RSTb MIN. TYP. MAX. UNIT
tWCLL tWCLH tDS tDH tcp tCS tCH tWCL tDC tDR tDOZL tDOZH tDOLZ tDOHZ tLZL tLLZ tRW tR tr tf
40 40 40 40 40 40 40 100 80 100 60 200 40 200 400 100 15 15
ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns
VDD=1.7 to 2.4V, Ta=-40 to 85C
PARAMETERS "L" Level CLK Clock Width "H" Level CLK Clock Width Data Set-Up Time Data Hold Time CS Wait Time CSb Set-Up Time CSb Hold Time CSb "L" Level Width Output Delay Time DATA Rise Time DATAOUT Enable Time DATAOUT Disable Time LED Enable Time LED Disable Time RESET "L" Level Width RESET Time Rising Time Falling Time SYMBOL
tWCLL tWCLH tDS tDH tcp tCS tCH tWCL tDC tDR tDOZL tDOZH tDOLZ tDOHZ tLZL tLLZ tRW tR tr tf
Terminal CLK CLK CLK, DATA CLK, DATA CS, CLK CS, CLK CS, CLK CS DATA, DATAOUT CL=10pF DATA CL=10pF DATAOUT CL=10pF, RL=10k DATAOUT CL=10pF, RL=10k LED1, LED2, LED3, EN CL=10pF, RL=10k LED1, LED2, LED3, EN CL=10pF, RL=10k RSTb RSTb CS, CLK, DATA, RSTb CS, CLK, DATA, RSTb
MIN.
TYP.
MAX.
UNIT
80 80 80 80 80 80 80 200 412 200 100 400 80 400 800 200 15 15
ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns
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NJU6061
(1)Data Input Timing
CS
tWCLL tWCLH tCH tWCL
CLK
tCP tCS tf tr
DATA
tDS tDH
DATAOUT
tDOZL tDOZH tDC tDOLZ tDOHZ
(2)Data Output Timing
CS
tCP tCS tWCLH tWCLL tCH
CLK
tr tDC LED1 tf tDR
DATA
INVALID
(3)Reset Timing
tRW tR
RSTb CS
(4)LED Enable Timing
EN LED1 to 3
tLZL
tLLZ
Note) All timing based on VDD, VSS voltage level.
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NJU6061
APPLICATION CIRCUIT
Example 1 VLED VDD VDD EN LED3 LED2 LED1 RLED RLED RLED +
+
NJU6061
RSTb CS CPU CLK DATA OSC ROSC VSS
Resistor Selection RLED = VLED - VF - VOL ILED LED Current Control Resistor LED Voltage LED Forward Voltage (@ILED) Output "L" Level Voltage (@ILED) LED Forward Current
RLED: VLED: VF: VOL: ILED:
Example) ILED = 30mA, VLED = 5.0V, VF = 2.0V(@ILED = 30mA), VOL=0.5V 5.0V - 2.0V - 0.5V 30mA
RLED =
= 83.3
Note) VF and VOL are depended on the situation. And decide the optimum values by the actual test when RLED is selected.
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NJU6061
Example 2 (Cascade connect) VLED + VDD VDD EN LED3 LED2 LED1 RLED RLED RLED +
NJU6061
RSTb CS CPU CLK DATA DATAOUT VSS OSC ROSC
VLED VDD VDD EN LED3 LED2 LED1 RLED RLED RLED
+
NJU6061
RSTb CS CLK DATA DATAOUT VSS OSC ROSC
VLED VDD VDD EN LED3 LED2 LED1 RLED RLED RLED
+
NJU6061
RSTb CS CLK DATA DATAOUT VSS OSC ROSC
[CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
Ver.2004-12-22
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