hd66740 Renesas Electronics Corporation., hd66740 Datasheet - Page 40

• Manufacturer Part Number: hd66740
• Description: 112 X 80-dot Graphics Lcd Controller/driver - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HD66740
a) Basic data-receive timing through the I2C bus interface
b) Consecutive data-receive timing through the I2C bus interface
a) Basic data-send timing through the I2C bus interface
b) Consecutive data-send timing through the I2C bus interface
SCL
(input)
SDA
(input/
output)
SCL
SDA
SCL
(input)
SDA
(input/
output)
SCL
SDA
Transfer start
Transfer start
note:
- Start byte should be transfered just after start (S).
Transfer start
Transfer start
S
S
note:
- Start byte should be transfered just after start (S).
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
Start byte
Start byte
"0" "1" "1" "1" "0"
"0" "1" "1" "1" "0"
1
1
Device ID code
Device ID code
2
Figure 16-a
2
Figure 16-b
3
3
Start byte
Start byte
4
4
5
5
Instruction or
RAM write
Dummy read
(1 byte)
ID RS
ID
6
6
RS RW
RS RW
"1"
7
7
Acknowledge
Acknowledge
"0"
"1"
8
I2C bus interface data-receive sequence
8
I2C bus interface data-send sequence
Ack D7 D6 D5 D4 D3 D2 D1 D0 Ack
Ack D7 D6 D5 D4 D3 D2 D1 D0 Ack
9
9
Instruction / RAM
write execution.
10 11 12 13 14 15 16 17 18
10 11 12 13 14 15 16 17 18
RAM data read
Instruction / RAM data
Instruction or
RAM write
RAM read
40
Instruction / RAM
write execution.
28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45
Acknowledge
Acknowledge
RAM data read
Instruction or
RAM write
Transfer end
Transfer end
Instruction / RAM
write execution.
Instruction or
RAM write
RAM data read
Instruction / RAM
write execution.
Transfer end
Transfer end
P
P