h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 315

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Port A MOS Pull-Up Control Register (PAPCR)
PAPCR is an 8-bit readable/writable register that controls the MOS input pull-up function
incorporated into port A on an individual bit basis.
Bits 7 to 4 are reserved; they return an undetermined value if read, and cannot be modified. In
modes 4 to 6, if a pin is in the input state in accordance with the settings in PFCR, in the SCI’s
SCMR, SMR, and SCR, and in DDR, setting the corresponding PAPCR bit to 1 turns on the MOS
input pull-up for that pin.
In mode 7, if a pin is in the input state in accordance with the settings in the SCI’s SCMR, SMR,
and SCR, and in DDR, setting the corresponding PAPCR bit to 1 turns on the MOS input pull-up
for that pin.
PAPCR is initialized by a reset or to H'0 (bits 3 to 0), and in hardware standby mode. It retains its
prior state in software standby mode.
Port A Open Drain Control Register (PAODR)
PAODR is an 8-bit readable/writable register that controls whether PMOS is on or off for each
port A pin (PA3 to PA0).
Bits 7 to 4 are reserved; they return an undetermined value if read, and cannot be modified.
When pins are not address outputs in accordance with the setting of bits AE3 to AE0 in PFCR,
setting a PAODR bit makes the corresponding port A pin an NMOS open-drain output, while
clearing the bit to 0 makes the pin a CMOS output.
PAODR is initialized to H'0 (bits 3 to 0) by a reset, and in hardware standby mode. It retains its
prior state in software standby mode.
Bit
Initial value :
R/W
Bit
Initial value :
R/W
:
:
:
:
Undefined Undefined Undefined Undefined
Undefined Undefined Undefined Undefined
—
—
—
—
7
7
—
—
—
—
6
6
—
—
—
—
5
5
—
—
—
—
4
4
Rev. 6.00 Feb 22, 2005 page 255 of 1484
PA3ODR PA2ODR PA1ODR PA0ODR
PA3PCR PA2PCR PA1PCR PA0PCR
R/W
R/W
3
0
3
0
R/W
R/W
2
0
2
0
Section 9 I/O Ports
REJ09B0103-0600
R/W
R/W
1
0
1
0
R/W
R/W
0
0
0
0