Datasheet

Appendix B Internal I/O Registers
Rev.6.00 Sep. 27, 2007 Page 1137 of 1268
REJ09B0220-0600
PFCR1—Port Function Control Register 1 H'FF45
7
—
0
R/W
6
—
0
R/W
5
—
0
R/W
4
—
0
R/W
3
A23E
1
R/W
0
A20E
1
R/W
2
A22E
1
R/W
1
A21E
1
R/W
Bit
Initial value
Read/Write
:
:
:
0
1
PA4DR is output when PA4DDR = 1
A
20
is output when PA4DDR = 1
Address 20 Output Enable
*
0
1
PA5DR is output when PA5DDR = 1
A
21
is output when PA5DDR = 1
Address 21 Output Enable
*
0
1
PA6DR is output when PA6DDR = 1
A
22
is output when PA6DDR = 1
Address 22 Output Enable
*
0
1
PA7DR is output when PA7DDR = 1
A
23
is output when PA7DDR = 1
Address 23 Output Enable
*
Reserved
Only 0 should be written to these bits
Note: * Valid only in modes 4 to 6.