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25.3
Operation
2
25.3.1
I
C Bus Data Format
2
The I
C bus interface has serial and I
2
The I
C bus formats are addressing formats with an acknowledge bit. These are shown in figure
25.3. The first frame following a start condition always consists of 8 bits.
The serial format is a non-addressing format with no acknowledge bit. This is shown in figure
25.4.
Figure 25.5 shows the I
The symbols used in figures 25.3 to 25.5 are explained in table 25.4.
(a) FS = 0 or FSX = 0
S
SLA
R/W
1
7
1
1
(b) Start condition transmission, FS = 0 or FSX = 0
S
SLA
R/W
1
7
1
1
Figure 25.3 I
FS = 1 and FSX = 1
S
1
Rev. 2.0, 11/00, page 546 of 1037
2
C bus formats.
2
C bus timing.
A
DATA
A
1
n
1
A
DATA
A/A
1
n1
m1
2
C Bus Data Formats (I
DATA
DATA
8
n
1
2
Figure 25.4 I
C Bus Data Format (Serial Format)
A/A
1
m
S
SLA
R/W
1
1
7
1
Upper: Transfer bit count (n1 and N2 = 1 to 8)
Lower: Transfer frame count (m1 and m2 = 1 or above)
2
C Bus Formats)
P
1
m
P
1
Transfer bit count
(n = 1 to 8)
Transfer frame count
(m = 1 or above)
A
DATA
1
1
n2
m2
Transfer bit count
(n = 1 to 8)
Transfer frame count
(m = 1 or above)
A/A
P
1
1
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