D12320VF25IV Datasheet, PDF (430/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 9 I/O Ports
Port Function Control Register 1 (PFCR1)
Bit
:
7
6
5
4
—
—
—
—
Initial value :
0
0
0
0
R/W
: R/W
R/W
R/W
R/W
3
A23E
1
R/W
2
A22E
1
R/W
1
A21E
1
R/W
0
A20E
1
R/W
PFCR1 is an 8-bit readable/writable register that performs I/O port control. PFCR1 is initialized to
H'0F by a reset, and in hardware standby mode.
Bits 7 to 4—Reserved: Only 0 should be written to these bits.
Bit 3—Address 23 Enable (A23E): Enables or disables address output 23 (A₂₃). This bit is valid
in modes 4 to 6.
Bit 3
A23E
0
1
Description
DR is output when PA7DDR = 1
A23 is output when PA7DDR = 1
(Initial value)
Bit 2—Address 22 Enable (A22E): Enables or disables address output 22 (A₂₂). This bit is valid
in modes 4 to 6.
Bit 2
A22E
0
1
Description
DR is output when PA6DDR = 1
A22 is output when PA6DDR = 1
(Initial value)
Bit 1—Address 21 Enable (A21E): Enables or disables address output 21 (A₂₁). This bit is valid
in modes 4 to 6.
Bit 1
A21E
0
1
Description
DR is output when PA5DDR = 1
A21 is output when PA5DDR = 1
(Initial value)
Rev.6.00 Sep. 27, 2007 Page 398 of 1268
REJ09B0220-0600