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(3)
LCD voltage boost control register 0 (LCDVA0)
LCDVA0 controls the voltage boost level during the voltage boost operation.
LCDVA0 is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets LCDVA0 to 00H.
Figure 13-5. Format of LCD Voltage Boost Control Register 0
Symbol
7
6
LCDVA0
0
0
GAIN
0
1.5 V (specification of the LCD panel used is 4.5 V.)
1
1.0 V (specification of the LCD panel used is 3 V.)
Note Select the settings according to the specifications of the LCD panel that is used.
Caution Before changing the LCDVA0 setting, be sure to stop voltage boosting (VAON0 = 0).
Remark
The TYP. value is indicated as the reference voltage (VLC2) value.
256
CHAPTER 13 LCD CONTROLLER/DRIVER
5
4
3
2
1
0
0
0
0
0
Reference voltage (V
User's Manual U15331EJ4V1UD
<0>
Address
After reset
GAIN
FFB3H
00H
Note
) level selection
LC2
R/W
R/W
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