HD6432621 Hitachi, HD6432621 Datasheet - Page 287

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

Port B MOS Pull-Up Control Register (PBPCR)
PBPCR is an 8-bit readable/writable register that controls the MOS input pull-up function
incorporated into port B 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 the TPU’s
TIOR, and in DDR, setting the corresponding PBPCR 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 TPU’s TIOR and in
DDR, setting the corresponding PBPCR bit to 1 turns on the MOS input pull-up for that pin.
PBPCR is initialized to H'00 by a reset, and in hardware standby mode. It retains its prior state in
software standby mode.
Port B Open Drain Control Register (PBODR)
PBODR is an 8-bit readable/writable register that controls the PMOS on/off state for each port B
pin (PB7 to PB0).
When pins are not address outputs in accordance with the setting of bits AE3 to AE0 in PFCR,
setting a PBODR bit makes the corresponding port B pin an NMOS open-drain output, while
clearing the bit to 0 makes the pin a CMOS output.
PBODR is initialized to H'00 by a reset, and in hardware standby mode. It retains its prior state in
software standby mode.
9.6.3
Port B pins also function as TPU input/output pins (TIOCA3, TIOCB3, TIOCC3, TIOCD3,
TIOCA4, TIOCB4, TIOCA5, TIOCB5) and address bus output pins (A15 to A8). Port B pin
functions are shown in table 9-10.
Bit
Initial value :
R/W
Bit
Initial value :
R/W
Pin Functions
:
:
:
:
PB7ODR PB6ODR PB5ODR PB4ODR PB3ODR PB2ODR PB1ODR PB0ODR
PB7PCR PB6PCR PB5PCR PB4PCR PB3PCR PB2PCR PB1PCR PB0PCR
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
243