HD66740 Datasheet, PDF (90/95 Pages) Hitachi Semiconductor – 112 x 80-dot Graphics LCD Controller/Driver

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
Turn on power voltages Vcc and Vci, RESET = "Low"
Wait for 1 ms or longer (power-on time)
Wait for 10 ms or longer (oscillation stabilization time)
Issue LCD power instruction
Issue use-state instruction
Wait for 10-150 ms or longer
(op-amplifier output
stabilization time)
Note: Depends on the
external capacitance of
V1OUT to V5OUT.
Turned on display: D = 1
Figure 52 Power-on Sequence
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