RX610 Group
14. I/O Ports
R01UH0032EJ0120 Rev.1.20
Page 429 of 1006
Feb 20, 2013
(4) PC3/A19
The pin function is switched as shown below according to the combination of the EXBE bit in SYSCR0, the rgister
setting for the bus controller, the port function control register m (PFCRm) setting, and the B3 bit in PC.DDR.
Module Name
Pin Function
Setting
Bus Controller
I/O Port
A19_OE
PC.DDR.B3
Bus controller
A19 output
*
1
I/O port
PC3 output
0
1
PC3 input (initial value)
0
0
Note:
*
Enabled in expansion mode with on-chip ROM disabled or disabled (SYSCR0.EXBE = 1).
(5) PC4/A20
The pin function is switched as shown below according to the combination of the EXBE bit in SYSCR0, the rgister
setting for the bus controller, the port function control register m (PFCRm) setting, and the B4 bit in PC.DDR.
Module Name
Pin Function
Setting
Bus Controller
I/O Port
A20_OE
PC.DDR.B4
Bus controller
A20 output
*
1
I/O port
PC4 output
0
1
PC4 input (initial value)
0
0
Note:
*
Enabled in expansion mode with on-chip ROM disabled or disabled (SYSCR0.EXBE = 1).
(6) PC5/A21/SCK5/CS5#-D
The pin function is switched as shown below according to the combination of the EXBE bit in SYSCR0, the rgister
setting for the bus controller, the port function control register m (PFCRm) setting, and the B5 bit in PC.DDR.
Module Name
Pin Function
Setting
Bus Controller
SCI
I/O Port
A21_OE
CS5#-D_OE
SCK5_OE
PC.DDR.B5
Bus controller
A21 output
*
1
CS5#-D output
*
0
1
SCI
SCK5 output
0
0
1
I/O port
PC5 output
0
0
0
1
PC5 input (initial value)
0
0
0
0
Note:
*
Enabled in expansion mode with on-chip ROM disabled or disabled (SYSCR0.EXBE = 1).