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abhinaw_9754
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abhinaw_9754
Asked: April 8, 20222022-04-08T12:01:00+05:30 2022-04-08T12:01:00+05:30In: Microprocessor

Comment on the direction of the port for the following CWR values in 8255 80H 8A H 8B H 92H …

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Comment on the direction of the port for the following CWR values in 8255 80H 8A H 8B H 92H …

Comment on the direction of the port for the following CWR values in 8255

  1. 80H
  2. 8A H
  3. 8B H
  4. 92H
  5. 98HComment on the direction of the port for the following CWR values in 8255 80H 8A H 8B H 92H ...
comment on the direction of the port for the following cwr values in 8255 80h 8a h 8b h 92h 98 h
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    1. DEV.CSE
      2022-04-08T12:21:48+05:30Added an answer on April 8, 2022 at 12:21 pm

      For 8A H, in mode 0. The value in CWR are D7 = 1, D6 = 0, D5 = 0, D4 = 0, D3 = 1, D2 = 0, D1 = 1 and D0 = 0
      For 8B H, in mode 0. The value in CWR are D7 = 1, D6 = 0, D5 = 0, D4 = 0, D3 = 1, D2 = 0, D1 = 1 and D0 = 1
      For 92 H, in mode 0. The value in CWR are D7 = 1, D6 = 0, D5 = 0, D4 = 1, D3 = 0, D2 = 0, D1 = 1 and D0 = 0
      For 98 H, in mode 0. The value in CWR are D7 = 1, D6 = 0, D5 = 0, D4 = 1, D3 = 1, D2 = 0, D1 = 0 and D0 = 0
      For 80 H, in mode 0. The value in CWR are D7 = 1, D6 = 0, D5 = 0, D4 = 0, D3 = 0, D2 = 0, D1 = 0 and D0 = 0

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