290
Bits 7 to 0—CS7 to CS0 Enable (CS7E to CS0E): These bits enable or disable the
corresponding
CSn
output.
Bit n
CSnE
Description
0
Pin is designated as I/O port and does not function as
CSn
output pin
1
Pin is designated as
CSn
output pin
(Initial value)
(n = 7 to 0)
Port Function Control Register 2 (PFCR2)
Bit
7
6
5
4
3
2
1
0
—
—
—
—
ASOE
LWROE
OES
DMACS
Initial value
0
0
0
0
1
1
1
0
Read/Write
—
—
—
—
R/W
R/W
R/W
R/W
PFCR2 is an 8-bit readable/writable register that performs I/O port control. PFCR2 is initialized to
H'0E by a reset and in hardware standby mode. It retains its prior state in software standby mode.
Bits 7 to 4—Reserved: These bits are always read as 0, and should only be written with 0.
Bit 1—OE Output Select (OES): Selects the
OE
output pin port when the OEE bit is set to 1 in
DRAMCR (enabling
OE
output).
Bit 1
OES
Description
0
P35 is designated as
OE
output pin
1
PH5 is designated as
OE
output pin
(Initial value)
5.17.3
Pin Functions
Port H pins also function as bus control signal output pins (
CS7
to
CS4
and
OE
) and interrupt
signal input pins (
IRQ7
and
IRQ6
). Port H pin functions are shown in table 5.37.
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