Issued Date: September 18, 2003
Model No.: V270W -
L03
Approval
6.2 POWER ON/OFF SEQUENCE
To prevent a latch-up or DC operation of LCD module, the power on/off sequence should be as the
diagram below.
0
≦
T
1
≦
10ms
0
≦
T
2
≦
50ms
0
≦
T
3
≦
50ms
1s
≦
T
4
50%
0V
0V
50%
T
6
T
5
T
3
T
1
0.1V
DD
0.9 V
CC
0.1V
CC
0.9 V
CC
T
4
T
2
VALID
Power On
Power Supply
V
CC
Signals
Power Off
Backlight (Recommended)
450ms
≦
T
5
100ms
≦
T
6
Power ON/OFF Sequence
Note.
(1) The supply voltage of the external system for the module input should be the same as the definition of Vcc.
(2) Apply the lamp voltage within the LCD operation range. When the backlight turns on before the LCD operation of
the LCD turns off before the backlight turns off, the display may momentarily become abnormal screen.
(3) In case of
VCC
= off level, please keep the level of input signals on the low or keep a high impedance.
(4) T4 should be measured after the module has been fully discharged between power of and on period.
(5) Interface signal shall not be kept at high impedance when the power is on.
16 / 26
The information described in this technical specification is tentative and it is possible to be changed without prior
notice. Please contact CMO ’s representative while your product design is based on this specification.
Version 2.0