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

HD66766R
Power-off sequence
Normal case
Emergency case
Power voltage
: Vcc
Vcc
GND
Rev. 1.0-1 / September 2002
Turn off the display: D1-0 = 00
Issue LCD power instruction
Turn off the power voltages : Vcc
To the power on sequence
Turn off the power voltage: Vcc
RESET = "L"
Driver SEG/COM output: GND level
To the power on sequence
Turn off the power voltage
RESET
Vcc
RESET is input as soon as possible.
GND
V1OUT
Driver SEG/COM
output
GND
Note: When hardware reset is input during the power-off period, the D1-0 bits are cleared to "00" and
SEG/COM output is forcibly lowered to the GND levels.
Figure 48 Power-off sequence
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