I2C
1
I2C (3)
2.1 (4)
2.2 (5)
3
I2C (6)
5
(7)
6.1 (7)
6.2 (8)
7
(10)
8.1 (10)
8.2 (10)
8.3 (11)
9
7 (13)
10.1 (13)
10.1.1 (14)
10.1.2 (15)
10.1.3 CBUS (16)
11
(17)
13
I/O (26)
15.1 (26)
15.2 Hs (28)
16
(33)
17.1 I2C (33)
17.2 I2C (34)
17.3 (34)
17.4 I2C R
p R S (35)
17.5 Hs I2C R
p R S (35)
18
Philips (37)
20
4400kbit/s
0~100kbit/s I 2C
1024
1.2
2.0-1998
I 2
C
Hs
I 2
C
2V
0.6V 6mA
Hs
13.222
6
7
2
LCD
RAM
DTMF
IC
Philips
150
CMOS
I 2
C
IC
I 2
C
I 2
C
SCL
8
100kbit/s
3.4Mbit/s
1I 2
C
I 2
C
IC
IC
I 2
C
IC
IC
1 I 2
C
a b
I 2
C
P C B
I 2
C
IC SO I 2
C
IC
IC ROM
3
I/O
IC
4
NMOS SDA
SCL
LCD
1
1 I2C
I2C
A B
A B
A
B
A
A
I2
C I2
C
1
SCL
S DA
S C L
MICRO -
CONTROLLER
A
STATIC
RAM OR
EEPROM
LCD
DRIVER
GATE
ARRAY ADC
MICRO -
CONTROLLER
B
2
I
2C
I2
C
5
I2
C
100kbit/s
3.4Mbit/s
13
I
2
C
15
6.1
SDA
4
SCLKN1
OUT
SCLK IN
SCLK
DATAN1
OUT DATA IN DEVICE 1
SDA (Serial Data Line)
SCL (Serial Clock Line)
SCLKN2
OUT SCLK IN
SCLK DATAN2OUT DATA IN DEVICE 2
V DD
R p
R p
pull-up resistors
3I 2
C
data line stable;data valid
change of data allowed
SDA
SCL
4 I 2
C
6.2I 2
C S P 5
SDA
SCL
15
Sr
S
SDA SCL
P
STOP condition
SDA
SCL
S
START condition
5
公
司机
密
7
SCL
CBUS
10.1.3
SDA
SDA
7
6 I 2
C
机
密
7 I2
C
8
8
C LK
1
CLK
2
SCL
start counting
8
SCL
密
10
14
Hs
8
13
9
DATA1
SDA
DATA 1
DATA 2
SDA
SCL
9
I
2
C
8.3
SCL