HD66740 Datasheet, PDF (92/95 Pages) Hitachi Semiconductor – 112 x 80-dot Graphics LCD Controller/Driver

HD66740
Power-off Sequence
Turn off display: D = 0
Issue LCD power instruction
Turn off power voltages Vcc and Vci
To the power-on sequence
Figure 54 Power-off Sequence
Vcc
Power voltage: Vcc
GND
Power is turned off.
Vcc
RESET
GND
V1OUT
Driver SEG/
COM output
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 55 Power-off Timing
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