Section 18 I
2
C Bus Interface (IIC)
Rev. 1.00 Apr. 28, 2008 Page 560 of 994
REJ09B0452-0100
18.4 Operation
The I
2
C bus interface has an I
2
C bus format and a serial format.
18.4.1 I
2
C Bus Data Format
The I
2
C bus format is an addressing format with an acknowledge bit. This is shown in figure 18.3.
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
18.4.
Figure 18.5 shows the I
2
C bus timing.
The symbols used in figures 18.3 to 18.5 are explained in table 18.7.
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 = from 1)
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
(a) FS = 0 or FSX = 0
(b) Start condition retransmission FS = 0 or FSX = 0
Upper row: Transfer bit count (n1, n2 = 1 to 8)
Lower row: Transfer frame count (m1, m2 = from 1)
Figure 18.3 I
2
C Bus Data Format (I
2
C Bus Format)
S
DATA
8
n
DATA
1
1
m
P
1
FS=1 and FSX=1
Transfer bit count
(n = 1 to 8)
Transfer frame count
(m = from 1)
Figure 18.4 I
2
C Bus Data Format (Serial Format)
Содержание H8S/2100 Series
Страница 2: ...Rev 1 00 Apr 28 2008 Page ii of xxvi...
Страница 54: ...Section 1 Overview Rev 1 00 Apr 28 2008 Page 28 of 994 REJ09B0452 0100...
Страница 92: ...Section 2 CPU Rev 1 00 Apr 28 2008 Page 66 of 994 REJ09B0452 0100...
Страница 158: ...Section 5 Interrupt Controller Rev 1 00 Apr 28 2008 Page 132 of 994 REJ09B0452 0100...
Страница 244: ...Section 8 8 Bit PWM Timer PWMU Rev 1 00 Apr 28 2008 Page 218 of 994 REJ09B0452 0100...
Страница 330: ...Section 10 16 Bit Timer Pulse Unit TPU Rev 1 00 Apr 28 2008 Page 304 of 994 REJ09B0452 0100...
Страница 354: ...Section 11 16 Bit Cycle Measurement Timer TCM Rev 1 00 Apr 28 2008 Page 328 of 994 REJ09B0452 0100...
Страница 380: ...Section 12 16 Bit Duty Period Measurement Timer TDP Rev 1 00 Apr 28 2008 Page 354 of 994 REJ09B0452 0100...
Страница 416: ...Section 13 8 Bit Timer TMR Rev 1 00 Apr 28 2008 Page 390 of 994 REJ09B0452 0100...
Страница 494: ...Section 15 Serial Communication Interface SCI Rev 1 00 Apr 28 2008 Page 468 of 994 REJ09B0452 0100...
Страница 612: ...Section 18 I 2 C Bus Interface IIC Rev 1 00 Apr 28 2008 Page 586 of 994 REJ09B0452 0100...
Страница 706: ...Section 20 LPC Interface LPC Rev 1 00 Apr 28 2008 Page 680 of 994 REJ09B0452 0100...
Страница 752: ...Section 21 FSI Interface Rev 1 00 Apr 28 2008 Page 726 of 994 REJ09B0452 0100...
Страница 774: ...Section 23 RAM Rev 1 00 Apr 28 2008 Page 748 of 994 REJ09B0452 0100...
Страница 1008: ...Section 28 Electrical Characteristics Rev 1 00 Apr 28 2008 Page 982 of 994 REJ09B0452 0100...
Страница 1020: ...Rev 1 00 Apr 28 2008 Page 994 of 994 REJ09B0452 0100...
Страница 1023: ......
Страница 1024: ...H8S 2117R Group Hardware Manual...