217
P3ODR is a 6-bit readable/writable register that controls the PMOS on/off status for each port 3
pin (P35 to P30).
Bits 7 and 6 are reserved; they are always read as 0 and cannot be modified.
Setting a P3ODR bit to 1 makes the corresponding port 3 pin an NMOS open-drain output pin,
while clearing the bit to 0 makes the pin a CMOS output pin.
P3ODR is initialized to H'00 (bits 5 to 0) by a reset and in hardware standby mode. It retains its
prior state in software standby mode.
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
PH3 is designated as
OE
output pin
(Initial value)
5.4.3
Pin Functions
Port 3 pins also function as SCI input/output pins (TxD0/IrTxD, RxD0/IrRxD, SCK0, TxD1,
RxD1, and SCK1), and a bus control signal output pin (
OE
). Port 3 pin functions are shown in
table 5.7.
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