HD66766R Datasheet, PDF (64/97 Pages) Hitachi Semiconductor – 132 x 176-dot Graphics LCD Controller/Driver for 65K Colors

HD66766R
Rev. 1.0-1 / September 2002
Setting flow for power supply and display instruction
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 the Vcc
1ms
Power on the Reset
more than 10ms (oscillation
circuit stabilization time)
more than 50ms (set-up circuit
1, 2 stabilization time)
Issue use-state
instruction (1)
Issue use-state
instruction (2)
Power on Initialized bits
Set BS3-0 bit
Set VR2-0 bit
Set CT6-0 bit
Set VC2-0 bit
Set BT2-0 bit
Set DC2-0 bit
Set AP1-0 bit
Normal display
Display off
sequence
Display off
Bits for display off
D1-0="00"
voltage polarity inverting circuit
operation starting bit
Set : BT3-1 = "1"
use-state instruction
Power off setting bit
Power supply circuit off
control set by AP1-0
more than 200ms (set-up circuit
2 / voltage inverting circuit
stabilization time)
Issue other mode setting
instruction (3)
Power off the Vcc
Display on
Sequence Note)
Display on
Bits for display on
D1-0="11"
Power On sequence
Figure 46 Power-on Sequence
Power Off sequence
Figure 47 Power-off Sequence
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