HD66781 Datasheet, PDF (38/196 Pages) Renesas Technology Corp – 720-channel Source Driver for a-Si TFT/Low Temperature Poly-Si TFT Panels with 262,144-color display RAM

HD66781
Preliminary
Table 7 BGR = 0
OSD ODF D17 D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0 * R5 R4 R3 R2 R1 R0 G5 G4 G3 G2 G1 G0 B5 B4 B3 B2 B1 B0
1 0 R5 R4 R3 R2 R1 α2 G5 G4 G3 G2 G1 α1 B5 B4 B3 B2 B1 α0
1 1 α2 α1 α0 R4 R3 R2 R1 R0 G4 G3 G2 G1 G0 B4 B3 B2 B1 B0
Table 8 BGR =1
OSD ODF D17 D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0 * B5 B4 B3 B2 B1 B0 G5 G4 G3 G2 G1 G0 R5 R4 R3 R2 R1 R0
1 0 B5 B4 B3 B2 B1 α0 G5 G4 G3 G2 G1 α1 R5 R4 R3 R2 R1 α2
1 1 α0 α1 α2 B4 B3 B2 B1 B0 G4 G3 G2 G1 G0 R4 R3 R2 R1 R0
Table 9
α2
α1
α0
Transmission rate
Display screen
0
0
0
0%
Base picture display
0
0
1
-
Setting disabled
0
1
0
25%
Base picture (75%) + OSD image (25%) display
0
1
1
75%
Base picture (25%) + OSD image (75%) display
1
0
0
50%
Base picture (50%) + OSD image (50%) display
1
0
1
-
Setting disabled
1
1
0
100%
OSD image display
1
1
1
-
Setting disabled
OSD: Set RAM write data as OSD data. Set OSD =1, when writing OSD data. By setting OSD to 1, OSD
data are written to the internal RAM according to the format set by ODF.
OSD =0: Write normal picture data (18-bit RGB) to RAM
OSD =1: Write OSD image data (18-bit (α+RGB)) to RAM
AM: Set the automatic updating method of address counter after data are written to GRAM.
AM =0, the address counter is updated in horizontal direction.
AM =1, the address counter is updated in vertical direction.
When a window-address range is specified, data are written in the window-address range specified within
the GRAM in accordance with I/D1-0 and AM setting.
I/D[1:0]: I/D sets automatic increment (+1) and automatic decrement (-1) of address counter (AC) after
data are written to GRAM. When I/D=0, the address counter is incremented or decremented in horizontal
direction (lower address: AD7-0). When I/D =1, the address counter is incremented or decremented in
vertical direction (upper address: AD16-8). The AM bit specifies the address transition direction when data
are being written to GRAM.
Rev.0.5, July.31.2003, page 38 of 196