UPD16488AP NEC [NEC], UPD16488AP Datasheet - Page 33

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

based on settings in power control register 2 (R33) (VRR2, VRR1, VRR0: normal display mode and PVR2, PVR1, PVR0:
partial display mode). Reference voltage values (1 + Rb/Ra) are determined based on 4-bit data set to V
resistance factor register, as shown in Table 5-13.
Rb/Ra is an on-chip resistance factor used for the V
PEV7
Table 5-13. Determination of Reference Voltage Values Based on Settings of
EV7
0
0
0
0
1
1
1
Table 5-12.
PEV6
EV6
0
0
0
0
1
1
1
On-Chip Resistor for V
Values Based on Settings in Electronic Volume Register
PEV5
EV5
0
0
0
0
1
1
1
VRR2
PVR2
0
0
0
0
1
1
1
1
PEV4
EV4
0
0
0
0
1
1
1
Data Sheet S15745EJ2V0DS
Register
Register
VRR1
PVR1
LCD
0
0
1
1
0
0
1
1
PEV3
EV3
voltage regulator. This factor can be controlled at eight levels
0
0
0
0
1
1
1
:
LCD
VRR0
PVR0
Voltage Regulation
0
1
0
1
0
1
0
1
PEV2
EV2
0
0
0
0
1
1
1
1+Rb/Ra
PEV1
EV1
0
0
1
1
0
1
1
12
13
16
19
21
24
5
8
PEV0
EV0
0
1
0
1
1
0
1
384
254
253
252
2
1
0
:
LCD
's on-chip
PD16488A
33