Datasheet

Section 7 I/O Ports
Rev. 3.00 Sep. 28, 2009 Page 194 of 910
REJ09B0350-0300
7.3.2 Port Control Register 1 (PTCNT1)
PTCNT1 selects ports that also function as IIC input/output pins.
Bit Bit Name Initial Value R/W Description
7
6
IIC1BS
IIC1AS
0
0
R/W
R/W
These bits select input/output pins for IIC_1
IIC1BS IIC1AS
0 0: Selects P86/SCL1 and P42/SDA1
0 1: Selects PG5/ExSCLA and
PG4/ExSDAA
1 0: Selects PG7/ExSCLB and
PG6/ExSDAB
1 1: Setting prohibited
4
5
⎯
⎯
0
0
R/W Reserved
The initial value should not be changed.
3
2
IIC0BS
IIC0AS
0
0
R/W
R/W
These bits select input/output pins for IIC_0
IIC0BS IIC0AS
0 0: Selects P52/SCL0 and P97/SDA0
0 1: Selects PG5/ExSCLA and
PG4/ExSDAA
1 0: Selects PG7/ExSCLB and
PG6/ExSDAB
1 1: Setting prohibited
1
0
⎯
⎯
0
0
R/W
R/W
Reserved
The initial value should not be changed.
Note: Do not set input/output of IIC_0 and IIC_1 for one pin at the same time.