HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 428

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 9 I/O Ports
Port Function Control Register 1 (PFCR1)
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 (A
in modes 4 to 6.
Bit 3
A23E
0
1
Bit 2—Address 22 Enable (A22E): Enables or disables address output 22 (A
in modes 4 to 6.
Bit 2
A22E
0
1
Bit 1—Address 21 Enable (A21E): Enables or disables address output 21 (A
in modes 4 to 6.
Bit 1
A21E
0
1
Rev.6.00 Sep. 27, 2007 Page 398 of 1268
REJ09B0220-0600
Bit
Initial value :
R/W
:
:
Description
DR is output when PA7DDR = 1
A
Description
DR is output when PA6DDR = 1
A
Description
DR is output when PA5DDR = 1
A
23
22
21
is output when PA7DDR = 1
is output when PA6DDR = 1
is output when PA5DDR = 1
R/W
—
7
0
R/W
—
6
0
R/W
—
5
0
R/W
—
4
0
A23E
R/W
3
1
A22E
R/W
2
1
23
22
21
). This bit is valid
). This bit is valid
). This bit is valid
A21E
R/W
1
1
(Initial value)
(Initial value)
(Initial value)
A20E
R/W
0
1