HD6432621 Hitachi, HD6432621 Datasheet - Page 279

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Port A MOS Pull-Up Control Register (PAPCR)
Note: * In the H8S/2626 Series bits 5 and 4 are reserved, and will return an undefined value if read.
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 and 6 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 to H'0 (bits 5 to 0) by a reset, and in hardware standby mode. It retains its
prior state in software standby mode.
Port A Open Drain Control Register (PAODR)
Note: * In the H8S/2626 Series bits 5 and 4 are reserved, and will return an undefined value if read.
PAODR is an 8-bit readable/writable register that controls whether PMOS is on or off for each
port A pin (PA5 to PA0).
Bits 7 and 6 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
—
—
—
—
7
7
—
—
—
—
6
6
PA5ODR * PA4ODR * PA3ODR
PA5PCR * PA4PCR * PA3PCR
R/W
R/W
5
0
5
0
R/W
R/W
4
0
4
0
R/W
R/W
3
0
3
0
PA2ODR PA1ODR
PA2PCR
R/W
R/W
2
0
2
0
PA1PCR
R/W
R/W
1
0
1
0
PA0ODR
PA0PCR
R/W
R/W
0
0
0
0
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