HD6432646 Hitachi, HD6432646 Datasheet - Page 292
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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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.
In modes 4 to 6, if a pin is in the input state in accordance with the settings in PFCR, in LPCR,
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 LPCR and 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'00, 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 (PA7 to PA0).
When pins are not address and LCD 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'00 by a reset, and in hardware standby mode. It retains its prior state in
software standby mode.
9.8.3
Port A pins also function as address bus outputs and LCD driver output pins (SEG21 to SEG24
and COM1 to COM4). The pin functions differ between modes 4 to 6, and mode 7. Port A pin
functions are shown in tables 9-13 and 9-14.
258
Bit
Initial value :
R/W
Bit
Initial value :
R/W
Pin Functions
:
:
:
:
PA7ODR PA6ODR PA5ODR PA4ODR PA3ODR PA2ODR PA1ODR PA0ODR
PA7PCR PA6PCR PA5PCR PA4PCR PA3PCR PA2PCR PA1PCR PA0PCR
R/W
R/W
7
0
7
0
R/W
R/W
6
0
6
0
R/W
R/W
5
0
5
0
R/W
R/W
4
0
4
0
R/W
R/W
3
0
3
0
R/W
R/W
2
0
2
0
R/W
R/W
1
0
1
0
R/W
R/W
0
0
0
0
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