RX610 Group
14. I/O Ports
R01UH0032EJ0120 Rev.1.20
Page 410 of 1006
Feb 20, 2013
14.3.6
Port 5 (P5)
(1) P50/WR0#/WR#
The pin function is switched as shown below according to the combination of the register setting for the bus controller
and the B0 bit in P5.DDR.
Module Name
Pin Function
Setting
Bus Controller
I/O Port
WR0#_OE/WR#_OE
P5.DDR.B0
Bus controller
WR0#/WR# output
*
1
I/O port
P50 output
0
1
P50 input (initial value)
0
0
Note:
*
Enabled in expansion mode with on-chip ROM disabled or disabled (SYSCR0.EXBE = 1).
(2) P51/WR1#/BC1#
The pin function is switched as shown below according to the combination of the port function control register (PFCRm)
setting and the B1 bit in P5.DDR.
Module Name
Pin Function
Setting
Bus Controller
I/O Port
WR1#_OE/BC1#_OE
P5.DDR.B1
Bus controller
WR1#/BC1# output
*
1
I/O port
P51 output
0
1
P51 input (initial value)
0
0
Note:
*
Enabled in expansion mode with on-chip ROM disabled or disabled (SYSCR0.EXBE = 1).
(3) P52/RD#
The pin function is switched as shown below according to the combination of the operating mode, the external bus enable
bit (EXBE) in the system control register 0 (SYSCR0), and the B2 bit in P5.DDR.
Module Name
Pin Function
Setting
Bus Controller
I/O Port
RD_OE
P5.DDR.B2
Bus controller
RD# output
*
1
I/O port
P52 output
0
1
P52 input (initial value)
0
0
Note:
*
Enabled in expansion mode with on-chip ROM disabled or disabled (SYSCR0.EXBE = 1).