HD66781 Datasheet, PDF (119/196 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
80-system 9-bit interface
The 80-system 9-bit parallel data transmission through DB17-9 pins is selected by setting IM3/2/1/0 pins to
Vcc1/GND/Vcc1/Vcc1 levels respectively. When transmitting a 16-bit instruction, it is divided into upper
and lower 8 bits (the LSB is not used) and the upper 8 bits are transmitted first. The RAM data is also
divided into the upper and lower 9 bits, and the upper bits are transmitted first. The DB8-0 pins, that are
not used, must be fixed to either IOVcc level. When writing the index register, the upper byte (8 bits) must
be written.
H8/2245
CSn*
A1
HWR
(RD*)
D15-0
CS*
RS
WR* ^HD66781
(RD*)
DB17-9
9
DB8-0
9
Example of Interface with the 9-bit Microcomputer
Instruction
First transmission (Upper)
Second transmission (Lower)
input
DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB
17 ^{16 15} 14 13 12 11 10 9 17 16 15 14 13 12 11 10 9
instruction
IB IB IB IB IB IB IB IB
15 ^{14 13} 12 11 10 9 8
IB IB IB IB IB IB IB IB
7 ^6543210
instruction code
RAM data write
First transmission (Upper)
Second transmission (Lower)
Input
DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB
17 16 15 14 13 12 11 10 9 17 16 15 14 13 12 11 10 9
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 ^α0
α2 α1 α0 R5 R4 R3 R2 R1 G5 G4 G3 G2 G1 B5 B4 B3 B2 B1
1pi xel
with 9-bit system interface
Normal display : 262,144 colors
OSD : 32,768 colors
9-bit interface data format
Rev.0.5, July.31.2003, page 119 of 196