RX610 Group
14. I/O Ports
R01UH0032EJ0120 Rev.1.20
Page 421 of 1006
Feb 20, 2013
14.3.11
Port A (PA)
(1) PA0/A0/BC0#/PO16/TIOCA6
The pin function is switched as shown below according to the combination of the external bus enable bit (EXBE) in the
system control register 0 (SYSCR0), the rgister settings for the PPG and TPU, and the B0 bit in PA.DDR.
Module Name
Pin Function
Setting
Bus Controller
TPU
PPG
I/O Port
A0_OE
BC0#_OE
TIOCA6_OE PO16_OE
PA.DDR.B0
Bus controller
Address output
*
1
0
1
Byte control output
*
0
1
1
TPU
TIOCA6 output
0
0
1
PPG
PO16 output
0
0
0
1
I/O port
PA0 output
*
0
0
0
0
1
PA0 input (initial value) 0
0
0
0
0
Note:
*
Address output is enabled when PA.DDR.B0 = 1 in expansion mode with on-chip ROM disabled or disabled
(SYSCR0.EXBE = 1).
(2) PA1/A1/PO17/(TIOCA6)/TIOCB6
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 B1 bit in PA.DDR.
Module Name
Pin Function
Setting
Bus Controller
TPU
PPG
I/O Port
A1_OE
TIOCB6_OE
PO17_OE
PA.DDR.B1
Bus controller
Address output
*
1
1
TPU
TIOCB6 output
0
1
PPG
PO17 output
0
0
1
I/O port
PA1 output
*
0
0
0
1
PA1 input (initial value) 0
0
0
0
Note:
*
Address output is enabled when PA.DDR.B1 = 1 in expansion mode with on-chip ROM disabled or disabled
(SYSCR0.EXBE = 1).