MC68HC912B32MFU8 MOTOROLA [Motorola, Inc], MC68HC912B32MFU8 Datasheet - Page 33

• Manufacturer Part Number: MC68HC912B32MFU8
• Description: 16-Bit Microcontroller
• Manufacturer: MOTOROLA [Motorola, Inc]

PORTB — Port B Register
PORTA — Port A Register
DDRA — Port A Data Direction Register
DDRB — Port B Data Direction Register
MC68HC912B32
MC68HC912B32TS/D
Single Chip
Expanded
Expanded
Exp Wide
Exp Wide
& Periph:
& Periph:
RESET:
RESET:
RESET:
RESET:
Narrow
Narrow
Single
Chip
Bits PA[7:0] are associated with addresses ADDR[15:8] and DATA[15:8]. When this port is not used for
external addresses and data, such as in single-chip mode, these pins can be used as general-purpose
I/O. DDRA determines the primary direction of each pin. This register is not in the on-chip map in ex-
panded and peripheral modes. Read and write anytime.
This register determines the primary direction for each port A pin when functioning as a general-purpose
I/O port. DDRA is not in the on-chip map in expanded and peripheral modes. Read and write anytime.
Bits PB[7:0] are associated with addresses ADDR[7:0] and DATA[7:0]. When this port is not used for
external addresses and data such as in single-chip mode, these pins can be used as general-purpose
I/O. DDRB determines the primary direction of each pin. This register is not in the on-chip map in ex-
panded and peripheral modes. Read and write anytime.
This register determines the primary direction for each port B pin when functioning as a general-purpose
I/O port. DDRB is not in the on-chip map in expanded and peripheral modes. Read and write anytime.
0 = Associated pin is a high-impedance input
1 = Associated pin is an output
0 = Associated pin is a high-impedance input
1 = Associated pin is an output
DATA15/7
ADDR15
ADDR15
DATA15
ADDR7
ADDR7
DATA7
DDA7
DDB7
Bit 7
Bit 7
Bit 7
PA7
Bit 7
PB7
–
0
0
–
DATA14/6
ADDR14
ADDR14
DATA14
ADDR6
ADDR6
DATA6
DDA6
DDB6
PA6
PB6
6
–
6
0
6
0
6
–
DATA13/5
ADDR13
ADDR13
DATA13
ADDR5
ADDR5
DATA5
DDA5
DDB5
PA5
PB5
5
–
5
0
5
0
5
–
DATA12/4
ADDR12
ADDR12
DATA12
ADDR4
ADDR4
DDA4
DATA4
DDB4
PA4
PB4
4
–
4
0
4
0
4
–
DATA11/3
ADDR11
ADDR11
DATA11
ADDR3
ADDR3
DATA3
DDA3
DDB3
PA3
PB3
3
–
3
0
3
0
3
–
DATA10/2
ADDR10
ADDR10
DATA10
ADDR2
ADDR2
DATA2
DDA2
DDB2
PA2
PB2
2
–
2
0
2
0
2
–
DATA9/1
ADDR9
ADDR9
DATA9
ADDR1
ADDR1
DDA1
DATA1
DDB1
PA1
PB1
1
–
1
0
1
0
1
–
DATA8/0
ADDR8
ADDR8
DATA8
ADDR0
ADDR0
DDA0
DATA0
DDB0
Bit 0
Bit 0
Bit 0
PA0
Bit 0
PB0
–
0
0
–
MOTOROLA
$0001
$0000
$0002
$0003
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