HD66781 Datasheet, PDF (146/196 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
18-bit RGB interface
The 18-bit RGB interface is selected by setting RIM1-0 bits to 10. The display operation is synchronized
with VSYNC, HSYNC, and DOTCLK signals. Display data are transmitted to RAM in synchronization
with the display operation through 18-bit RGB data bus (PD17-0) according to the data enable signal
(ENABLE).
The instructions are set only through the system interface.
LCDC/MPU
VSYNC
HSYNC
DOTCLK
HD66781
ENABLE
PD17-0
18
input
PD PD PD PD PD PD PD PD PD PD PD PD PD PD PD PD PD PD
17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
GRAM write
data
OSD data
ODF=0
OSD data
ODF=1
R5 R4 R3 R2 R1 R0 G5 G4 G3 G2 G1 G0 B5 B4 B3 B2 B1 B0
R5 R4 R3 R2 R1 ^α2 G5 G4 G3 G2 G1 α1 B5 B4 B3 B2 B1 ^α 0
α 2 α1 α0 R5 R4 R3 R2 R1 G5 G4 G3 G2 G1 B5 B4 B3 B2 B1
1pixel
262,144 colors with 18-bit RGB interface
Example of 18-Bit RGB Interface and data format
Rev.0.5, July.31.2003, page 146 of 196