Abov MC97F6108A - MC97 F6108 A Inter Integrated Circuit (I2 C)

16. Inter Integrated Circuit (I2C) MC97F6108A User’s manual
168
16 Inter Integrated Circuit (I2C)
Inter Integrated Circuit (I2C) is one of the industrial standard serial communication protocols, and which
uses 2 bus lines Serial Data Line (SDA) and Serial Clock Line (SCL) to exchange data. Because both
SDA and SCL lines are open-drain output, each line needs pull-up resistor.
The I2C has the features listed below:
 Compatible with I2C bus standard
 Multi-master operation
 Up to 400kHz data transfer speed
 7 bit address
 Support 2 slave addresses
 Both master and slave operation
 Bus busy detection
16.1 Block diagram
Figure 75. I2C Block Diagram
SDA
F/F
8-bit Shift Register
(SHFTR)
Slave Addr. Register1
(I2CSAR1)
Noise
Canceller
(de-bounce)
Data Out Register
(I2CDR)
(I2CSCLHR)
(I2CSCLLR)
(I2CDAHR)
SDA
Out Controller
SCL
Out Controller
SCL
Noise
Canceller
(de-bounce)
I
n
t
e
r
n
a
l
B
u
s
L
i
n
e
SDAIN
SDAOUT
SCLIN
SCLOUT
1
0
1
0
De-bounce
enable
De-bounce
enable
Slave Addr. Register
(I2CSAR)