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参数资料
型号： MC68HC912BL16FU8
厂商： FREESCALE SEMICONDUCTOR INC
元件分类： 微控制器/微处理器
英文描述： 16-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP64
封装： QFP-64
文件页数： 56/128页
文件大小： 3326K
代理商： MC68HC912BL16FU8
MC68HC912BL16TS/D
33
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.
0 = Associated pin is a high-impedance input
1 = Associated pin is an output
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
PORTA — Port A Register
$0000
Bit 7
6
5
4
3
2
1
Bit 0
Single
Chip
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
RESET:
–
Exp Wide
& Periph:
ADDR15
DATA15
ADDR14
DATA14
ADDR13
DATA13
ADDR12
DATA12
ADDR11
DATA11
ADDR10
DATA10
ADDR9
DATA9
ADDR8
DATA8
Expanded
Narrow
ADDR15
DATA15/7
ADDR14
DATA14/6
ADDR13
DATA13/5
ADDR12
DATA12/4
ADDR11
DATA11/3
ADDR10
DATA10/2
ADDR9
DATA9/1
ADDR8
DATA8/0
DDRA — Port A Data Direction Register
$0002
Bit 7
6
5
4
3
2
1
Bit 0
DDA7
DDA6
DDA5
DDA4
DDA3
DDA2
DDA1
DDA0
RESET:
0
PORTB — Port B Register
$0001
Bit 7
6
5
4
3
2
1
Bit 0
Single Chip
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
RESET:
–
Exp Wide
& Periph:
ADDR7
DATA7
ADDR6
DATA6
ADDR5
DATA5
ADDR4
DATA4
ADDR3
DATA3
ADDR2
DATA2
ADDR1
DATA1
ADDR0
DATA0
Expanded
Narrow
ADDR7
ADDR6
ADDR5
ADDR4
ADDR3
ADDR2
ADDR1
ADDR0
DDRB — Port B Data Direction Register
$0003
Bit 7
6
5
4
3
2
1
Bit 0
DDB7
DDB6
DDB5
DDB4
DDB3
DDB2
DDB1
DDB0
RESET:
0
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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