UPD16640C Просмотр технического описания (PDF) - NEC => Renesas Technology
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UPD16640C Datasheet PDF : 16 Pages
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µ PD16640C
4. RELATION BETWEEN INPUT DATA AND OUTPUT VOLTAGE VALUE
The 11 major points on the γ-characteristic curve of the LCD panel are arbitrarily set by external power supplies V0
through V10. If the display data is 00H or 3FH, gray scale voltage V0 or V10 is output. If the display data is in the
range 01H to 3EH, the high-order 3 bits select an external powers pair Vn+1, Vn. The low-order 3 bits evenly divide
the range of Vn+1, Vn into eight segments by means of D/A conversion (however, the ranges from V9 to V8 and from V2
to V1 are divided into seven segments) to output a 64-grayscale voltage.
DX5 (MSB)
DX4
DX3
DX2
DX1
DX0 (LSB)
High-order 3 bits : γ-corrected power selected
(Vn+1-Vn)
Low-order 3 bits : 3-bit D/A
(range Vn-Vn+1 is divided into 7 or 8 segments)
DX5
DX4
DX3
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Vn+1-Vn
V1-V2
V2-V3
V3-V4
V4-V5
V5-V6
V6-V7
V7-V8
V8-V9
Vn
1
2
3
4
5
6
7
8
Vn+1
000 001 010 011 100 101 110 111
DX2-DX0
0.1 V
VDD2
V0
V1
V2
V3
V4
V5
V6
V7
V8
V9
Figure 4-1. Relation between Input Data and γ -corrected Voltage
gray scale supply specified
by 00H
7 segments
8 segments
8 segments
8 segments
8 segments
8 segments
8 segments
7 segments
V10
gray scale supply specified
0.1 V
VSS2
0
7
F
17
1F
27
2F
37
3F
by 3FH
Input data (HEX)
Data Sheet S11269EJ1V1DS00
5
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