Datasheet

Section 17 I
2
C Bus Interface (IIC)
Rev. 3.00 Sep. 28, 2009 Page 507 of 910
REJ09B0350-0300
17.2 Input/Output Pins
Table 17.1 summarizes the input/output pins used by the I
2
C bus interface.
One of three pins can be specified as SCL and SDA input/output pin for IIC_0 and IIC_1. Two or
more input/output pins should not be specified for one channel.
For the method of setting pins, see section 7.3.2, Port Control Register 1 (PTCNT1).
Table 17.1 Pin Configuration
Channel Symbol* Input/Output Function
SCL0 Input/Output Serial clock input/output pin of IIC_0
0
SDA0 Input/Output Serial data input/output pin of IIC_0
SCL1 Input/Output Serial clock input/output pin of IIC_1 1
SDA1 Input/Output Serial data input/output pin of IIC_1
SCL2 Input/Output Serial clock input/output pin of IIC_2 2
SDA2 Input/Output Serial data input/output pin of IIC_2
ExSCLA Input/Output Serial clock input/output pin of IIC_0 or IIC_1
ExSDAA Input/Output Serial data input/output pin of IIC_0 or IIC_1
⎯
ExSCLB Input/Output Serial clock input/output pin of IIC_0 or IIC_1
ExSDAB Input/Output Serial data input/output pin of IIC_0 or IIC_1
Note: * In the text, the channel subscript is omitted, and only SCL and SDA are used.