RX610 Group
14. I/O Ports
R01UH0032EJ0120 Rev.1.20
Page 423 of 1006
Feb 20, 2013
(5) PA4/A4/PO20/TIOCA7
The pin function is switched as shown below according to the combination of the EXBE bit in SYSCR0, the rgister
settings for the PPG and TPU, and the B4 bit in PA.DDR.
Module Name
Pin Function
Setting
Bus Controller
TPU
PPG
I/O Port
A4_OE
TIOCA7_OE
PO20_OE
PA.DDR.B4
Bus controller
Address output
*
1
1
TPU
TIOCA7 output
0
1
PPG
PO20 output
0
0
1
I/O port
PA4 output
*
0
0
0
1
PA4 input (initial value) 0
0
0
0
Note:
*
Address output is enabled when PA.DDR.B4 = 1 in expansion mode with on-chip ROM disabled or disabled
(SYSCR0.EXBE = 1).
(6) PA5/A5/PO21/(TIOCA7)/TIOCB7/(TCLKG)
The pin function is switched as shown below according to the combination of the EXBE bit in SYSCR0, the rgister
settings for the PPG and TPU, and the B5 bit in PA.DDR.
Module Name
Pin Function
Setting
Bus Controller
TPU
PPG
I/O Port
A5_OE
TIOCB7_OE
PO21_OE
PA.DDR.B5
Bus controller
Address output
*
1
1
TPU
TIOCB7 output
0
1
PPG
PO21 output
0
0
1
I/O port
PA5 output
*
0
0
0
1
PA5 input (initial value) 0
0
0
0
Note:
*
Address output is enabled when PA.DDR.B5 = 1 in expansion mode with on-chip ROM disabled or disabled
(SYSCR0.EXBE = 1).