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2
I
C Module Operation
2
15.2 I
C Module Operation
The I
Figure 15−2 shows an example of an I
by a unique address and can operate as either a transmitter or a receiver. A
device connected to the I
when performing data transfers. A master initiates a data transfer and gener-
ates the clock signal SCL. Any device addressed by a master is considered
a slave.
2
I
pin (SCL). Both SDA and SCL are bidirectional, and must be connected to a
positive supply voltage using a pull-up resistor.
2
Figure 15−2. I
C Bus Connection Diagram
Serial Data (SDA)
Serial Clock (SCL)
Note: SDA and SCL Levels
The MSP430 SDA and SCL pins must not be pulled up above the MSP430
V
15-4
USART Peripheral Interface, I
2
C module supports any slave or master I
2
C bus can be considered as the master or the slave
C data is communicated using the serial data pin (SDA) and the serial clock
V CC
MSP430
level.
CC
2
C Mode
2
C-compatible device.
2
2
C bus. Each I
C device is recognized
Device A
Device C
Device B
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