Port 5 - Renesas H8S/2100 Series Hardware Manual

(8) P40/TMI0/TxD2/TCMCYI0
The pin function is switched as shown below according to the combination of the TMR and the
SCI and the P40DDR bit.
Module
Name Pin Function
SCI TxD2 output
I/O port P40 output
P40 input
(initial setting)
7.2.5

Port 5

(1) P52/SCL0
The pin function is switched as shown below according to the combination of the IIC0AS and
IIC0BS bits in PTCNT1, ICE bit in ICCR of IIC_0, and the P52DDR bit.
Module
Name Pin Function
IIC SCL0 output
I/O port P52 output
P52 input
(initial setting)
Note: To use this pin as SCL0, clear the IIC0AS and IIC0BS bits in PTCNT1 to 0. The output
format for SCL0 is NMOS output only and direct bus drive is possible. When this pin is used
as the P52 output pin, the output format is NMOS push-pull.
SCI
TxD2_OE
1
0
0
IIC_0
SCL0_OE
1
0
0
Section 7 I/O Ports
Setting
I/O Port
P40DDR

1
0
Setting
I/O Port
P52DDR

1
0
Rev. 1.00 Apr. 28, 2008 Page 159 of 994
REJ09B0452-0100