HD66781 Datasheet, PDF (143/196 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
6-bit RGB interface
The 6-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 6-bit RGB data bus (PD17-12) according to the data enable signal
(ENABLE). Unused pins (PD11 to 0) must be fixed to either IOVcc or GND level.
The instructions are set only through the system interface.
LC DC/M PU
VSYNC
HSYNC
DOTCLK _{HD 66781}
ENABLE
6
PD17-12
PD11-0
12
input
First transmission
Second transmission
Third transmission
PD PD PD PD PD PD PD PD PD PD PD PD PD PD PD PD PD PD
17 16 15 14 13 12 17 16 15 14 13 12 17 16 15 14 13 12
GRAM Write
data
R5
R4
R3
R2
R1
R0
G5
G4
G3
G2
G1
G0
B5
B4
B3
B2
B1
B0
OSD data
ODF=0
R5 R4 R3 R2 R1 ^α2 G5 G4 G3 G2 G1 ^α1 B5 B4 B3 B2 B1 α0
OSD data
ODF=1
α2 α1 α0 R5 R4 R3 R2 R1 G5 G4 G3 G2 G1 B5 B4 B3 B2 B1
1 pixel
262,144 colors with 6-bit interfacs
Example of 6-Bit RGB Interface and data format
Rev.0.5, July.31.2003, page 143 of 196