HD66781 Datasheet, PDF (121/196 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 8-bit interface (Big endian)
The 80-system 8-bit parallel data transmission is selected by setting IM3/2/1/0 pins to
GND/GND/Vcc1/Vcc1 levels respectively. When transmitting a 16-bit instruction, it is divided into upper
and lower 8 bits and the upper 8 bits are transmitted first. The RAM data is also divided into the upper and
lower 8 bits, and the upper bits are transmitted first. The data to write to RAM are expanded into 18 bits
internally. The DB9-0 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*
(RD*)
HD66781
DB17-10
8
DB9-0
10
Example of Interface with the 8-bit Microcomputer
Rev.0.5, July.31.2003, page 121 of 196