Renesas H8SX/1520 Series Hardware Manual page 258

Section 8 I/O Ports
(3)
P21/TIOCA3/IRQ9-A/SCS2
The pin function is switched as shown below according to the combination of the port function
control register 9 (PFCR9), SSU_2, TPU_3, and P21DDR bit settings.
Module Name
SSU_2
TPU_3*
I/O port
Note: Supported only by the H8SX/1527.
*
(4)
P20/TIOCA3/TIOCB3/IRQ8-A
The pin function is switched as shown below according to the combination of the port function
control register 9 (PFCR9), TPU_3, and P20DDR bit settings.
Module Name
TPU_3*
I/O port
Note: Supported only by the H8SX/1527.
*
Rev. 3.00 Mar. 14, 2006 Page 220 of 804
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SSU_2
SCS2_OE
Pin Function
SCS2 output
1
TIOCA3 output 0
P21 output 0
P21 input 0
(initial setting)
Pin Function
TIOCB3 output
P20 output
P20 input (initial setting)
Setting
TPU_3*
TIOCA3_OE

1
0
0
TPU_3*
TIOCB3_OE
1
0
0
I/O Port
P21DDR


1
0
Setting
I/O Port
P20DDR

1
0