HD66717 Datasheet, PDF (44/90 Pages) Hitachi Semiconductor – (Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver)

HD66717
Table 18 First Bytes of I²C Bus Interface Data
First Byte
S
Bit 1
I²C bus system Transfer
start
A6
HD66717
Transfer
start
ID5
O
Bit 2
A5
ID4
I
Transferred Bit String
Bit 3 Bit 4 Bit 5 Bit 6
I²C slave address
A4
A3
A2
A1
Device ID code
ID3 ID2 ID1 ID0
I
I
Bit 7
A0
RS
Bit 8
R/W
0
Bit 9
ACK
ACK
Transfer start
Transfer end
SCL
(input)
SDA
(input)
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
MSB
MSB
ID5 ID4 ID3 ID2 ID1 ID0 RS "0" Ack D7 D6 D5 D4 D3 D2 D1 D0 Ack D7 D6 D5 D4 D3 D2 D1 D0 Ack
Device ID code RS
1st instruction
2nd instruction
Slave address
1st byte
Acknowledge
Acknowledge
Instructions
Acknowledge
a) Basic data transfer (receive) timing
SCL
(input)
SDA
(input)
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 28 29 30 31 32 33 34 35 36
S
1st byte
Start
A
A
A
A
C
Instruction 1
C
Instruction 2
C Instrucation 3 C P
K
K
K
K
Instruction 1 execution Instruction 2 execution
time
time
End
b) Consecutive data transfer timing
Note: Transfer the instruction 2 ACK after instruction 1 has been executed.
Figure 22 I²C Bus Interface Timing Sequence
496