UPD16641N 데이터 시트보기 (PDF) - NEC => Renesas Technology
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UPD16641N Datasheet PDF : 20 Pages
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µPD16641
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 to 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 gray scale voltage.
DX5 (MSB)
DX4
DX3
DX2
DX1
DX0 (LSB)
High-order 3 bits: γ-corrected power selected
Low-order 3 bits: 3bit D/A
(Vn+1, Vn)
(range Vn to 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 to Vn
V1 to V2
V2 to V3
V3 to V4
V4 to V5
V5 to V6
V6 to V7
V7 to V8
V8 to V9
VDD2 V0
V1
V2
V3
V4
V5
V6
V7
V8
V9
Vn
1
2
3
4
5
6
7
8
Vn+1
000 001 010 011 100 101 110 111
DX2 to DX0
gray scale supply specified
by 00H
7 segments
8 segments
8 segments
8 segments
8 segments
8 segments
8 segments
7 segments
VSS2 V10
gray scale supply specified
0
7
F
17
1F
27
2F
37
3F
by 3FH
Input data (HEX)
5
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