Rev. 5.00, 12/03, page 290 of 1088
Port Function Control Register 1 (PFCR1)
Bit
:
7
6
5
4
3
2
1
0
CSS17
CSS36 PF1CS5S PF0CS4S
A23E
A22E
A21E
A20E
Initial value :
0
0
0
0
1
1
1
1
R/W
:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
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.
Bit 7—CS17 Select (CSS17): Selects whether
CS1
or
CS7
is output from the PG3 pin. Change
the CSS17 bit setting only when the corresponding DDR bit is 0. This bit is valid in modes 4 to 6.
Bit 7
CSS17
Description
0
PG3 is the PG3/
CS1
pin.
CS1
output is enabled when CS167E = 1 and PG3DDR =
1
(Initial value)
1
PG3 is the PG3/
CS7
pin.
CS7
output is enabled when CS167E = 1 and PG3DDR =
1
Bit 6—CS36 Select (CSS36): Selects whether
CS3
or
CS6
is output from the PG1 pin. Change
the CSS36 bit setting only when the corresponding DDR bit is 0. This bit is valid in modes 4 to 6.
Bit 6
CSS36
Description
0
PG1 is the PG1/
IRQ7
/
CS3
pin.
CS3
output is enabled when CS25E = 1 and
PG1DDR = 1
(Initial value)
1
PG1 is the PG1/
IRQ7
/
CS6
pin.
CS6
output is enabled when CS167E = 1 and
PG1DDR = 1
Bit 5—Port F1 Chip Select 5 Select (PF1CS5S): Enables or disables
CS5
output. For details,
see section 8.11, Port F.
Bit 4—Port F0 Chip Select 4 Select (PF0CS4S): Enables or disables
CS4
output. For details,
see section 8.11, Port F.
Bit 3—Address 23 Enable (A23E): Enables or disables address output 23 (A23). For details, see
section 8.2, Port 1.
Bit 2—Address 22 Enable (A22E): Enables or disables address output 22 (A22). For details, see
section 8.2, Port 1.
Содержание H8S/2318 series
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