Datasheet

Section 15 I
2
C Bus Interface (IIC)
Rev. 6.00 Mar. 24, 2006 Page 250 of 412
REJ09B0142-0600
S SLA R/W A DATA A A/A P
111
1n7
1 m
(a) I
2
C bus format (FS = 0 or FSX = 0)
(b) I
2
C bus format (start condition retransmission, FS = 0 or FSX = 0)
n: transfer bit count
(n = 1 to 8)
m: transfer frame count
(m ≥ 1)
S SLA R/W A DATA
11
1 n17
1 m1
S SLA R/W A DATA A/A P
11
1 n27
1 m2
1
11
A/A
n1 and n2: transfer bit count (n1 and n2 = 1 to 8)
m1 and m2: transfer frame count (m1 and m2 ≥ 1)
11
Figure 15.3 I
2
C Bus Data Formats (I
2
C Bus Formats)
SDA
SCL
S
1-7
SLA
8
R/W
9
A
1-7
DATA
89 1-7 89
A DATA P
A/A
Figure 15.4 I
2
C Bus Timing
[Legend]
S: Start condition. The master device drives SDA from high to low while SCL is high
SLA: Slave address
R/W: Indicates the direction of data transfer: from the slave device to the master device when
R/W is 1, or from the master device to the slave device when R/W is 0
A: Acknowledge. The receiving device drives SDA
DATA: Transferred data
P: Stop condition. The master device drives SDA from low to high while SCL is high