hd66789 Renesas Electronics Corporation., hd66789 Datasheet - Page 76

• 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 9-bit interface
The 80-system 9-bit parallel data transmission becomes operable by setting IM3/2/1/0 pins to
IOVcc/GND/IOVcc/IOVcc 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 unused pins
DB8-0 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 76 of 156
Instruction
Write data to
Instructions
RAM data write
Input
GRAM
Input
15
DB
IB
17
DB
R5
17
DB
14
IB
16
DB
R4
16
1
DB
13
IB
15
st
1
DB
R3 R2
15
Transfer (Upper)
st
H8/2254
Transmission (Upper)
DB
12
IB
14
9-bit microcomputer and HD66789
DB
14
Data format for 9-bit interface
DB
11
IB
13
R1
DB
13
D15-0
HWR*
(RD*)
CSn*
DB
IB
10
12
DB
A1
R0
12
DB
IB
11
9
DB
G5
11
DB
Instruction code
10
IB
8
DB
G4
10
One pixel
9
DB
9
GND
DB
G3
9
DB
17
IB
7
DB
G2
17
9
DB
DB8-0
16
CS*
RS
WR*
(RD*)
DB17-9
IB
6
G1
DB
16
262,144 colors are available in the 9 - bit system interface.
2
DB
15
nd
IB
5
DB
G0
15
Transfer (Lower)
2
nd
DB
HD66789
14
Transmission (Lower)
IB
4
DB
B5
14
DB
13
IB
3
DB
B4
13
DB
12
IB
2
DB
B3
12
DB
11
IB
1
DB
B2
11
DB
10
IB
0
DB
B1
10
DB
9
Preliminary
DB
B0
9