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18.4
Operation
2
18.4.1
I
C Bus Data Format
2
The I
C bus interface has an I
2
The I
C bus formats are addressing formats with an acknowledge bit. These are shown in figures
18.3 (a) and (b). The first frame following a start condition always consists of 9 bits.
The serial format is a non-addressing format with no acknowledge bit. This is shown in figure
18.4.
Figure 18.5 shows the I
The symbols used in figures 18.3 to 18.5 are explained in table 18.8.
(a) FS = 0 or FSX = 0
S
SLA
R/W
1
7
1
1
(b) Start condition retransmission FS = 0 or FSX = 0
S
SLA
R/W
1
1
7
1
Figure 18.3 I
FS=1 and FSX=1
S
1
2
C bus format and a serial format.
2
C bus timing.
A
DATA
A
1
n
1
m
A
DATA
A/A
1
1
n1
m1
2
C Bus Data Formats (I
DATA
DATA
8
n
1
2
Figure 18.4 I
C Bus Data Formats (Serial Formats)
A/A
P
Transfer bit count
(n = 1 to 8)
1
1
Transfer frame count
(m = from 1)
S
SLA
R/W
A
1
1
1
7
1
Upper row: Transfer bit count (n1, n2 = 1 to 8)
Lower row: Transfer frame count (m1, m2 = from 1)
2
C Bus Formats)
P
1
Transfer bit count
(n = 1 to 8)
m
Transfer frame count
(m = from 1)
Rev. 1.00 Mar. 12, 2008 Page 617 of 1178
2
Section 18 I
C Bus Interface (IIC)
A/A
P
DATA
1
1
n2
m2
REJ09B0403-0100
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