4.8 POWER ON/OFF SEQUENCE
To prevent a latch-up or DC operation of LCD module, the power on/off sequence should be as the
Note (1) The supply voltage of the external system for the module input should be the same as the
definition of Vcc.
Note (2) When the backlight turns on before the LCD operation of the LCD turns off, the display may
momentarily become abnormal screen.
Note (3) In case of VCC = off level, please keep the level of input signals on the low or keep a high
Note (4) T4 should be measured after the module has been fully discharged between power off and on
Note (5) Interface signal shall not be kept at high impedance when the power is on.
Note (6) CMO won’t take any responsibility for the products which are damaged by the customers not
following the Power Sequence.
Note (7) There might be slight electronic noise when LCD is turned off (even backlight unit is also off). To
avoid this symptom, we suggest "Vcc falling timing" to follow "t6 spec".
30 Aug 2011
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