hd66789 Renesas Electronics Corporation., hd66789 Datasheet - Page 78

• Manufacturer Part Number: hd66789
• Description: 528-channel, One-chip Driver For Amorphous Tft Panels With 262,144-color Display Ram, Power Supply Circuit, And Gate Circuit
• Manufacturer: Renesas Electronics Corporation.

HD66789
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.
Rev.0.12, May 09 2003, page 78 of 156
H8/2245
8-bit microcomputer and HD66789
HWR*
D15 - 0
(RD*)
CSn*
A1
8
GND
10
DB9-0
CS *
RS
WR*
(RD*)
DB17-10
HD6 6 6789
Preliminary