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MC68HC812A4 Datasheet

  • MC68HC812A4

  • Microcontrollers

  • 3859.31KB

  • Motorola   Motorola

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Bus Control and Input/Output (I/O)
6.4.1 Port A Data Register
Address:
$0000
Bit 7
Read:
PA7
Write:
Reset:
0
0
ADDR14
0
ADDR13
0
ADDR12
0
ADDR11
0
ADDR10
0
ADDR9
0
ADDR8
PA6
PA5
PA4
PA3
PA2
PA1
PA0
6
5
4
3
2
1
Bit 0
Expanded and peripheral: ADDR15
Figure 6-1. Port A Data Register (PORTA)
Read: Anytime, if register is in the map
Write: Anytime, if register is in the map
Bits PA7鈥揚(yáng)A0 are associated with addresses ADDR15鈥揂DDR8
respectively. When this port is not used for external addresses 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 expanded and peripheral modes.
6.4.2 Port A Data Direction Register
Address: $0002
Bit 7
Read:
DDRA7
Write:
Reset:
0
0
0
0
0
0
0
0
DDRA6
DDRA5
DDRA4
DDRA3
DDRA2
DDRA1
DDRA0
6
5
4
3
2
1
Bit 0
Figure 6-2. Port A Data Direction Register (DDRA)
Read: Anytime, if register is in the map
Write: Anytime, if register is in the map
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.
1 = Associated pin is an output.
0 = Associated pin is a high-impedance input.
MC68HC812A4
鈥?/div>
Rev. 3.0
96
Bus Control and Input/Output (I/O)
Advance Information
MOTOROLA

MC68HC812A4相關(guān)型號(hào)PDF文件下載

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  • 英文版
    INTEGRATED CIRCUITS
    ETC
  • 英文版
    INTEGRATED CIRCUITS
    ETC [ETC]
  • 英文版
    INTEGRATED CIRCUITS
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    INTEGRATED CIRCUITS
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  • 英文版
    INTEGRATED CIRCUITS
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    INTEGRATED CIRCUITS
    ETC [ETC]
  • 英文版
    INTEGRATED CIRCUITS
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  • 英文版
    INTEGRATED CIRCUITS
    ETC [ETC]
  • 英文版
    INTEGRATED CIRCUITS
    ETC
  • 英文版
    INTEGRATED CIRCUITS
    ETC [ETC]
  • 英文版
    INTEGRATED CIRCUITS
    ETC
  • 英文版
    INTEGRATED CIRCUITS
    ETC [ETC]
  • 英文版
    INTEGRATED CIRCUITS
    ETC
  • 英文版
    INTEGRATED CIRCUITS
    ETC [ETC]
  • 英文版
    INTEGRATED CIRCUITS
    ETC
  • 英文版
    INTEGRATED CIRCUITS
    ETC [ETC]
  • 英文版
    ETC [INTEGRATED CIRCUITS]
    ETC
  • 英文版
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