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Chapter 12 Serial Interface 3
Operation
XII - 27
12-3-3 Single Master IIC Interface
Activation factor for Communication
Set data (at transmission) or dummy data (at reception) to the transmit/receive shift register SC3TRB.
Start condition and transfer clock are generated to start communication, regardless of transmission/
reception. This serial interface can not be used for slave communication.
IIC serial communication in single master is available at serial interface 3. Communication of this IIC
interface is based on the data transfer format of Philips, IIC-BUS.
Table 12-3-11 shows the functions of IIC serial interface.
Table 12-3-11 IIC Serial Interface Functions
Communication type IIC (single master)
Interrupt SC3IRQ
Pin SDA, SCL
Transfer bit count 1 to 8 bit
First transfer bit
ACK bit
ACK bit level
fosc/2
fosc/4
fosc/16
fosc/32
fs/2
fs/4
timer 5 output
The transfer rate is the clock source divided by 3.
Clock source