HD66740 Datasheet, PDF (91/95 Pages) Hitachi Semiconductor – 112 x 80-dot Graphics LCD Controller/Driver

Vcc
Power voltage: Vcc
GND
RESET
Vcc
GND
Power-on reset time: 1 ms
Oscillation state
Vcc
Signal-input
instruction issued
GND
Oscillation stabilization time: 10 ms
Note: CR oscillation starts by power-on and input reset.
The standby mode is cleared by input reset.
Figure 53 Power-on Timing
HD66740
91