Datasheet

Section 16 I
2
C Bus Interface (IIC) (Option)
Rev. 6.00 Mar. 18, 2010 Page 654 of 982
REJ09B0054-0600
S SLA R/W A DATA A A/A P
1111
n7
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
111
n17
1 m1
S SLA R/W A DATA A/A P
111
n27
1 m2
111
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 16.3 I
2
C Bus Data Formats (I
2
C Bus Formats)
S DATA DATA P
11
n8
1 m
FS = 1 and FSX = 1
n: transfer bit count
(n = 1 to 8)
m: transfer frame count
(m ≥ 1)
Figure 16.4 I
2
C Bus Data Format (Serial Format)
SDA
SCL
S
1 to 7
SLA
8
R/W
9
A
1 to 7
DATA
8 9 1 to 7 8 9
A DATA PA/A
Figure 16.5 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