UPD16488AP NEC [NEC], UPD16488AP Datasheet - Page 69

• Manufacturer Part Number: UPD16488AP
• Description: 1/92 DUTY LCD CONTROLLER/DRIVER WITH FOUR-LEVEL GRAY SCALE, ON-CHIP RAM
• Manufacturer: NEC [NEC]

6.28 Electronic Volume Register (R35)
mode. Any value among 256 steps can be selected.
Default settings (initial values set by reset command)
6.29 Partial Electronic Volume Register (R36)
display mode. Any value among 256 steps can be selected.
Default settings (initial values set by reset command)
6.30 Boost Adjustment Register (R37)
Default settings (initial values set by reset command)
The electronic volume register specifies the electronic volume value for adjusting the contrast when using normal display
The partial electronic volume register specifies the electronic volume value for adjusting the contrast when using partial
The voltage (range: 1/8 V
RS
RS
RS
D
D
D
1
0
1
0
1
−
7
7
7
PEV7
EV7
D
D
D
D
D
D
0
0
−
−
7
6
7
6
7
6
PEV6
EV6
D
D
D
D
D
D
0
0
−
−
6
5
6
5
6
5
DD2
PEV5
EV5
to 7/8 V
D
D
D
D
D
D
0
0
−
−
Table 6-13. Boost Adjustment Register (R37) Settings
5
4
5
4
5
4
DDC2
0
0
0
0
1
1
1
1
PEV4
DD2
EV4
D
D
D
D
D
D
0
0
−
−
4
3
4
3
4
3
) set to this register is applied to the boost level set for the booster.
DDC1
0
0
1
1
0
0
1
1
PEV3
EV3
D
D
D
D
D
D
Data Sheet S15745EJ2V0DS
0
0
−
0
3
2
3
2
3
2
DDC0
0
1
0
1
0
1
0
1
DDC2
PEV2
EV2
D
D
D
D
D
D
0
0
0
2
1
2
1
2
1
Boost Adjustment Voltage
Regulator Circuit Stopped
DDC1
PEV1
EV1
D
D
D
D
D
D
0
0
0
1
0
1
0
1
0
1/8 V
2/8 V
3/8 V
4/8 V
5/8 V
6/8 V
7/8 V
DDC0
PEV0
EV0
DD2
DD2
DD2
DD2
DD2
DD2
DD2
D
D
D
0
0
0
Setting
Setting
Setting
−
−
−
µ µ µ µ PD16488A
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