參數(shù)資料
型號: UPD161401
廠商: NEC Corp.
英文描述: 256-COLOR, 1/80-DUTY LCD CONTROLLER/DRIVER WITH ON-CHIP RAM
中文描述: 256色,1/80-DUTY LCD控制器/驅(qū)動器,片內(nèi)RAM
文件頁數(shù): 107/124頁
文件大?。?/td> 647K
代理商: UPD161401
Data Sheet S15726EJ2V0DS
107
μ
PD161401
8.4 Power OFF Sequence (with External Driving Power Supply)
This is an example of inputting a reference voltage to the V
RS
pin and a driving voltage to the V
OUT
pin from an
external power supply.
Operation status
Control register 1
DISP = 0, HALT = 0
Power system control register 5
(HPM1, HPM0 = 1, 0)
R0
Display OFF.
Internal operation starts.
R56
Change the operation mode of the operational
amplifier to “power OFF mode”.
Wait for at least 300 ms until power is OFF
Note
.
Turn OFF driving voltage V
OUT
after the levels of V
LCD
and V
LC1
to V
LC4
have completely dropped.
Driving power supply OFF
Power OFF
Power to V
DD1
and V
DD2
OFF
Note
The time of 300 ms varies depending on the characteristics of the LCD panel and the capacitance of the
smoothing capacitor. It is recommended to determine this value after thorough evaluation with the actual
system (refer to
8.5 Flow of V
OUT
and V
LCD
Voltages from Power ON to Power OFF
).
#
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