Rev. 2.0, 11/00, page 546 of 1037
25.3
Operation
25.3.1
I
2
C Bus Data Format
The I
2
C bus interface has serial and I
2
C bus formats.
The I
2
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
2
C bus timing.
The symbols used in figures 25.3 to 25.5 are explained in table 25.4.
S
A
SLA
7
n
R/W
DATA
A
1
1
m
1
1
1
A/A
1
P
1
Transfer bit count
(n = 1 to 8)
Transfer frame count
(m = 1 or above)
S
SLA
7
n1
7
R/W
A
DATA
1
1
1
m1
1
A/A
1
S
1
SLA
R/W
1
1
m2
A
1
DATA
n2
A/A
1
P
1
Upper: Transfer bit count (n1 and N2 = 1 to 8)
Lower: Transfer frame count (m1 and m2 = 1 or above)
(a) FS = 0 or FSX = 0
(b) Start condition transmission, FS = 0 or FSX = 0
Figure 25.3 I
2
C Bus Data Formats (I
2
C Bus Formats)
S
DATA
8
n
DATA
1
1
m
P
1
Transfer bit count
(n = 1 to 8)
Transfer frame count
(m = 1 or above)
FS = 1 and FSX = 1
Figure 25.4 I
2
C Bus Data Format (Serial Format)
Содержание Hitachi H8S/2191
Страница 123: ...Rev 2 0 11 00 page 96 of 1037...
Страница 149: ...Rev 2 0 11 00 page 122 of 1037...
Страница 197: ...Rev 2 0 11 00 page 170 of 1037...
Страница 247: ...Rev 2 0 11 00 page 220 of 1037...
Страница 249: ...Rev 2 0 11 00 page 222 of 1037...
Страница 347: ...Rev 2 0 11 00 page 320 of 1037...
Страница 357: ...Rev 2 0 11 00 page 330 of 1037...
Страница 417: ...Rev 2 0 11 00 page 390 of 1037...
Страница 431: ...Rev 2 0 11 00 page 404 of 1037...
Страница 439: ...Rev 2 0 11 00 page 412 of 1037...
Страница 457: ...Rev 2 0 11 00 page 430 of 1037...
Страница 525: ...Rev 2 0 11 00 page 498 of 1037...
Страница 543: ...Rev 2 0 11 00 page 516 of 1037...
Страница 639: ...Rev 2 0 11 00 page 612 of 1037 28 1 2 Block Diagram Figure 28 1 shows a block diagram of the servo circuits...
Страница 845: ...Rev 2 0 11 00 page 818 of 1037...