Operation; C Bus Data Format; Figure 16.3 I C Bus Data Format (I C Bus Format); Figure 16.4 I C Bus Data Format (Serial Format) - Renesas H8S Series Hardware Manual

16.4

Operation

2
The I C bus interface has an I
2
16.4.1 I

C Bus Data Format

2
The I C bus format is an addressing format with an acknowledge bit. This is shown in figure 16.3.
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
16.4.
Figure 16.5 shows the I
The symbols used in figures 16.3 to 16.5 are explained in table 16.6.
(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 7 1
1
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 n1 1
m1
2
Figure 16.3 I C Bus Data Format (I
DATA DATA
8 n
1
2
Figure 16.4 I C Bus Data Format (Serial Format)
A/A P
Transfer bit count
(n = 1 to 8)
1 1
Transfer frame count
(m = from 1)
S SLA R/W A
1 7 1 1
1
Upper row: Transfer bit count (n1, n2 = 1 to 8)
Lower row: Transfer frame count (m1, m2 = from 1)
2
C Bus Format)
P
1
Transfer bit count
(n = 1 to 8)
m
Transfer frame count
(m = from 1)
Rev. 3.00 Jul. 14, 2005 Page 535 of 986
2
Section 16 I C Bus Interface (IIC)
A/A P
DATA
1 1
n2
m2
REJ09B0098-0300