UPD161401 Datasheet, PDF (56/124 Pages) NEC – 256-COLOR, 1/80-DUTY LCD CONTROLLER/DRIVER WITH ON-CHIP RAM

µPD161401
5 ^{(1) Main duty display mode to sub-duty display mode}
Operation status
↓
Control register 1
DISP = 0, HALT = 0
↓
Power system control register 5
(HPM1 = 1, HPM0 = 0)
↓
Control register 2
DTY = 1
↓
Power system control register 5
(HPM1 = 0, HPM0 = 1)
↓
Power system control register 5
(HPM1 = 0, HPM0 = 0)
↓
Control register 1
(DISP = 1, HALT = 0)
↓
Setting completed
Main duty display mode
R0
Display OFF. Internal operation starts.
Change the operation mode of the operational
R56
amplifier to “power OFF mode”.
R1
Sub-duty display mode setting ^Note1
Wait time 1
Wait for at least 50 ms. ^Note2
Change the operation mode of the operational
R56
amplifier to “power ON mode”.
Wait time 2
Wait for at least 150 ms. ^Note2
The operation mode of the operational amplifier:
R56
“normal mode”.
R0
Display ON. Internal operation starts.
Notes 1. A scroll function cannot be used in sub-duty display mode. In the state where the scroll function is used by
main duty display mode when it changes to sub-duty, a scroll function is disregarded. Then, when it
changes to main duty display mode again, a scroll function returns to an effective state (state before
changing to sub-duty).
2. The wait times 1, 2 vary depending on the characteristics of the LCD panel and the capacitance of the
boosting or smoothing capacitor. It is recommended to determine these values after thorough evaluation
with the actual system.
56
Data Sheet S15726EJ2V0DS