HD66789 Datasheet, PDF (78/156 Pages) Renesas Technology Corp – 528-channel, One-chip Driver for Amorphous TFT Panels with 262,144-color display RAM, Power Supply Circuit, and Gate Circuit

HD66789
Preliminary
80-system 8-bit interface
The 80-system 8-bit parallel data transmission becomes operable by setting IM3/2/1/0 pins to
GND/GND/IOVcc/IOVcc 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 unused pins DB9-0 must be fixed to either IOVcc or GND level. When writing into
the index register, the upper byte (8 bits) must be written.
H8/2245
CSn*
A1
HWR*
(RD*)
D15- 0
CS *
RS
WR*
(RD*)
HD66789
DB17-10
8
DB9-0
10
GND
8-bit microcomputer and HD66789
Rev.0.12, May 09 2003, page 78 of 156