UPD161622 NEC, UPD161622 Datasheet - Page 41

• Manufacturer Part Number: UPD161622
• Description: 396 OUTPUT TFT-LCD SOURCE DRIVER
• Manufacturer: NEC

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taking the -curve in Figure 5–22 as an example.
Remark x: Switch is normally OFF with the amplifier OFF.
Relationship of drive voltage (normally white)
The relationship between the setting of the contrast value setting register and the driven waveform is explained next,
FEH
R36
R37
00H
01H
02H
03H
FFH
Negative
Positive
Polarity
Table 5–12. Switch Status when -Curve Correction Power Supply Circuit is not used (G
Relationship between Setting Value of R36 to R39 Registers and Switch Status (G
Table 5–11. -Contrast Value Setting and Electronic Volume Register
VPH
VNH
VNL
VPL
V
GPL7
GNL7
V
SS
S
0
0
0
0
1
1
R36
R37
R38
R39
Register
GNL6
GPL6
SPH1
0
0
0
0
1
1
x
x
GPL5
GNL5
0
0
0
0
1
1
00H
Other than 00H
00H
Other than 00H
00H
Other than 00H
00H
Other than 00H
SNL1
x
x
Setting value
Positive polarity
GNL4
GPL4
0
0
0
0
1
1
SNH1
Data Sheet S15649EJ2V0DS
x
x
GPL3
GNL3
0
0
0
0
1
1
SR36
SR37
SR38
SR39
SPL1
x
x
GNL2
GPL2
Switch status
0
0
0
0
1
1
Switch Status
Negative polarity
GPL1
GNL1
SPH2
OFF
ON
0
0
1
1
1
1
OFF
OFF
OFF
OFF
ON
ON
ON
ON
GNL0
GPL0
0
1
0
1
0
1
SNL2
OFF
ON
Setting 1 (VPL, VNL)
Fixed to V
Amplifier
Statement setting
OFF
OFF
OFF
OFF
ON
ON
ON
ON
SNH2
White
Black
SEL
OFF
value setting or
ON
[R1] = 1)
S
255
254
253
(amplifier OFF)
SEL
PD161622
2
1
[R1] = 0)
SPL2
OFF
ON
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