HD66760 Datasheet, PDF (85/105 Pages) Hitachi Semiconductor – 104 X 80-dot Graphics LCD Controller/Driver for 256 Colors

Power-off Sequence
Normal state
Turn off display: D1-0 = 00
Issue LCD power instruction
Turn off power voltages Vcc and Vci
To the power-on sequence
Emergency case
Turn off power voltages Vcc and Vci
RESET = "Low"
Driver SEG/COM output: GND
To the power-on sequence
Figure 58 Power-off Sequence
Vcc
Power voltage: Vcc
GND
Power is turned off.
Vcc
RESET
GND
Driver SEG/
COM output
V1OUT
GND
RESET is input as soon as possible.
Note: When hardware reset is input during the power-off period, the D bit is
cleared to 0 and SEG/COM output is forcibly lowered to the GND level.
Figure 59 Power-off Timing
HD66760