NJU6538FG1 NJR, NJU6538FG1 Datasheet
NJU6538FG1
Specifications of NJU6538FG1
Related parts for NJU6538FG1
NJU6538FG1 Summary of contents
Page 1
... Port / Key scan output select Bleeder Resistance On-chip Software Contrast Control (16 steps) Operating Voltage Logic Operating Voltage 2.7 to 5.5V LCD Driving Voltage 5.0 Package Outline QFP100-G1 QFP100-C2 C-MOS Technology (Substrate: P) Ver.2003-05-09 1/8, 1/9, 1/10 Duty 10.0V to NJU6538 PRELIMINARY PACKAGE OUTLINE NJU6538FG1 NJU6538FC2 - 1 - ...
Page 2
... DD VLCD 1 VLCD OSC RESb CE SCL SIO S / VLCD 1 VLCD OSC RESb NJU6538FG1 NJU6538FC2 SEG 50 SEG 49 SEG 48 SEG 47 SEG 46 SEG 45 SEG 44 SEG 43 SEG 42 SEG 41 SEG 40 SEG 39 SEG 38 SEG 37 SEG 36 SEG 35 SEG 34 SEG 33 SEG 32 SEG 31 SEG 30 SEG 29 SEG 28 SEG 27 SEG 26 SEG 48 SEG 47 SEG 46 SEG ...
Page 3
BLOCK DIAGRAM VLCD1 E.V.R. VLCD2 VSS Timing Oscillator OSC Generator RESb Power ON Reset Ver.2003-05-09 Common Driver Instruction Decoder Instruction Data Buffer RESET Serial I/F NJU6538 Segment Driver Display Data RAM Input Column Address Decoder Buffer Key ...
Page 4
NJU6538 TERMINAL DESCRIPTION No. Symbol FG1 FC2 SEG to SEG COM to COM COM to COM ...
Page 5
FUNCTIONAL DESCRIPTION (1) Description for each blocks (1-1) Serial I/F The serial I/F controls serial data from external data. (1-2) Instruction data buffer The instruction data buffer stores instruction code from external. (1-3) Instruction decoder The instruction decoder decodes instruction ...
Page 6
NJU6538 (2) Instruction 3-wired Serial I/F is clock synchronized of the SCL clock. and D A0 signal. The data input as MSB(D7) first serially. Instruction Display ON/OFF (a) Page address set (b) Culumn address set Higher order 3-bits (c) Culumn ...
Page 7
Instruction discription (a) Display ON / OFF This instruction selects display turn-on or turn-off regardless of the contents of the DDRAM Display OFF 1: Display ON (b) Page address ...
Page 8
NJU6538 (d) Display data write This instruction writes display data into the selected column address on the DDRAM. The column address automatically increments (+1) whenever the display data is written by this instruction, so that this instruction can be continuously ...
Page 9
Reset This instruction reset the LSI to the following status, however it doesn’t change the contents of the DDRAM. Please be careful that it can’t be substituted for the reset operation by using of the RESb terminal. Reset status ...
Page 10
NJU6538 (j) Duty select Duty select instruction is which sets LCD driving duty ratio 1/8 or 1/9 or 1/10 duty (k) Power ...
Page 11
General output port set. This instruction sets the PWM value outputted from Po0 ~ Po3 terminals. The “General output port select” instruction selects the general output port to output with PWM. The “General output port PWM set” instruction sets ...
Page 12
NJU6538 ...
Page 13
Example ) Set output PWM waveform of Po0 to Po3 terminal, shown below: PWM phase set D PWMEN=1, (PWM PWM PWM 6, 5, Po0 1 Po1 Po2 Po3 32-steps (n) General output port / Key scan output select This instruction ...
Page 14
NJU6538 (3) Input Data Format and Timing Data format is shown below. When the CE terminal goes to “L”, I/F is data output. When the CE terminal goes to “H” (rising edge) at SCL terminal “H”, I/F is data input. ...
Page 15
Data output timing The data output format shows bellow. The data output mode is set by “L” status of SCL terminal at the rising signal of CE terminal. CE SCL SIO * KD1 KD2 SIO state Output (5-3) Power ...
Page 16
NJU6538 (5-5) Normal mode Key scan operates with follows in normal mode. 1, Key scan signal output terminals S0 – S4 output “H” signals when key scan does not operate, and output key scan signals after start of key scan ...
Page 17
Power save mode Key scan operates with follows in Power save mode. 1, Key scan signal output terminals S0 – S4 output “H”, “L” signals by the Power save mode set when key scan does not operate (refer the ...
Page 18
NJU6538 (5-7) Key More Input Key scan signal output terminal output “H” level in state of Key More Input. Although Key state is detected without diodes to prevent unexpected key scan signal flow, non-pressed key data may ...
Page 19
Key data reading out operation by external MPU (a) Display data writing Display data and an instruction change operate at the rising edge of 9-bit on SCL signal. (b) Key data reading out operation The minimum period from Key ...
Page 20
NJU6538 Timing chart of key data reading out operation Key input SO CE SCL Interrupt Decision (6) Reset circuit initializes Reset circuit initializes the NJU6538 at Power ON and OFF. It generates reset signal to initialize the system at low ...
Page 21
Reset status using the RESb terminal (default) 1. Serial interface register clear 2. Display off 3. ADC select 4. Normal Display (Non-inverse display) 5. Whole display off 6. Power save mode 7. Page address 8. Column address 9. EVR ...
Page 22
NJU6538 (7) LCD panel drive (7-1) LCD driving voltage generation circuit LCD driving voltage generation circuit generates LCD driving bias voltages V adjusts the voltage by 8 steps electrical volume from V by resistor-voltage-dividing as shown in below. VLCD1, VLCD2, ...
Page 23
ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL VDD max Supply voltage VLCD max V Input terminal voltage V V OUT1 Output terminal voltage V OUT2 Power dissipation Pdmax Storage temperature Tstg Operating temperature Topr Note 1) All voltage values are specified as ...
Page 24
NJU6538 DC Electrical Characteristics SYMBO PARAMETER L Power supply (1) VDD Power supply (2) VLCD1 Output voltage VLCD2 V0 Input voltage V1 V2 ”H” level input voltage (1) VIH(1) ”H” level input voltage (2) VIH(2) ”L” level input voltage (1) ...
Page 25
AC Characteristics PARAMETER SYMBOL “L” level t WCLL clock pulse width “H” level t WCLH clock pulse width Data setup time t DS Data hold time wait time setup time hold ...
Page 26
NJU6538 Relation between oscillation frequency and LCD frame frequency (1)1/8 duty 1 V LCD2 V 0 COM1 LCD2 V 0 SEGn Ex.)fosc=50kHz Frame frequency =1/(40T x ...
Page 27
APPLICATION CIRCUIT MPU *2 V LCD * The rising time of Power source voltage at Power on and the falling time at Power off must keep over than ...