hd66740 Renesas Electronics Corporation., hd66740 Datasheet - Page 90

• Manufacturer Part Number: hd66740
• Description: 112 X 80-dot Graphics Lcd Controller/driver - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HD66740
Power-on/off Sequence
To prevent pulse lighting of LCD screens at power-on/off, the power-on/off sequence is activated as
shown below. However, since the sequence depends on LCD materials to be used, confirm the
conditions by using your own system.
Power-on Sequence
Issue use-state instruction
Turn on power voltages Vcc and Vci, RESET = "Low"
Wait for 10 ms or longer (oscillation stabilization time)
Wait for 1 ms or longer (power-on time)
Issue LCD power instruction
Turned on display: D = 1
Figure 52
Wait for 10-150 ms or longer
(op-amplifier output
stabilization time)
Power-on Sequence
90
Note: Depends on the
external capacitance of
V1OUT to V5OUT.