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Section 8 I/O Ports
(3)
PF5/A21/CS5-D
The pin function is switched as shown below according to the combination of port function control
register (PFCR) and the PF5DDR bit settings.
Module Name
Pin Function
Bus controller
A21 output
CS5-D output
I/O port
PF5 output
PF5 input
(initial setting)
(4)
PF4/A20
The pin function is always address output.
Module Name
Pin Function
Bus controller
A20 output
(5)
PF3/A19
The pin function is always address output.
Module Name
Pin Function
Bus controller
A19 output
Rev.2.00 Jun. 28, 2007 Page 284 of 666
REJ09B0311-0200
A21_OE
1
0
0
0
0
Setting
I/O Port
PF4DDR
Setting
I/O Port
PF3DDR
Setting
I/O Port
CS5D_OE
PF5DDR
1
1
0
0
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