
128 SEG / 129 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 1.2 KS0741
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RESET CIRCUIT
Setting RESETB to “L” or Reset instruction can initialize internal function.
When RESETB becomes “L”, following procedure is occurred.
Page address: 0
Column address: 0
Read-modify-write: OFF
Display ON / OFF: OFF
Initial display line: 0 (first)
Initial COM0 register: 0 (COM0)
Partial display duty ratio: 1/128
Reverse display ON / OFF: OFF (normal)
N-line inversion register: 0 (disable)
Entire Display ON/OFF: OFF
ICON Control register ON/OFF: OFF (ICON disable)
Power control register (VC, VR, VF) = (0, 0, 0)
DC-DC converter circuit = (0, 0)
Regulator resistor select register: (R2, R1, R0) = (0, 0, 0)
Contrast Level: 32
LCD bias ratio: 1/12
COM Scan Direction: 0
ADC Select: 0
Oscillator: OFF
Power Save Mode: Release
Display Data Length register: 0 (for SPI mode)
White mode set: OFF
White palette register (WG3, WG2, WG1, WG0) = (0, 0, 0, 0)
Light gray mode set: OFF
Light gray palette register (LG3, LG2, LG1, LG0) = (0, 0, 0, 0)
Dark gray mode set: OFF
Dark gray palette register (DG3, DG2, DG1, DG0) = (1, 1, 1, 1)
Black mode set: OFF
Black palette register (BG3, BG2, BG1, BG0) = (1, 1, 1, 1)
FRC, PWM mode: 4FRC, 9PWM
When RESET instruction is issued, following procedure is occurred.
Page address: 0
Column address: 0
Read-modify-write: OFF
Initial display line: 0 (First)
Regulator resistor select register: (R2, R1, R0) = (0, 0, 0)
Contrast Level: 32
Display Data Length register: 0 (for SPI mode)
White mode set: OFF
White palette register (WG3, WG2, WG1, WG0) = (0, 0, 0, 0)
Light gray mode set: OFF
Light gray palette register (LG3, LG2, LG1, LG0) = (0, 0, 0, 0)
Dark gray mode set: OFF
Dark gray palette register (DG3, DG2, DG1, DG0) = (1, 1, 1, 1)
Black mode set: OFF
Black palette register (BG3, BG2, BG1, BG0) = (1, 1, 1, 1)
FRC, PWM mode: 4FRC, 9PWM
While RESETB is “L” or reset instruction is executed, no instruction except read status can be accepted. Reset
status appears at DB4. After DB4 becomes ”L”, any instruction can be accepted. RESETB must be connected to the
reset pin of the MPU, and initialize the MPU and this LSI at the same time. The initialization by RESETB is essential
before used.