86. If all the ports of Intel 8255 are programmed as I/P ports in mode 0, the CW will be—

1. 1. 9B H

   
   
   

   2. 1 BH

   
   
   

   3. 99 H

   
   
   

   4. 8 BH

   
   
   

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1. View Hint View Answer Discuss in Forum

   9B H

   Correct Option: A

   9B H

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87. Bit D₇ of the control register in 8255 specifies—
    

1. 1. I/O bus

   
   
   

   2. BSR bus

   
   
   

   3. Both (A) and (B)

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   Both I/O and BSR functions

   Correct Option: C

   Both I/O and BSR functions

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88. The mode 1 of Intel 8255 performs—

1. 1. Simple I/P

   
   
   

   2. Bi-directional Data transfer

   
   
   

   3. Simple I/O

   
   
   

   4. I/O with handshake

   
   
   

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1. View Hint View Answer Discuss in Forum

   I/O with handshake

   Correct Option: D

   I/O with handshake

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89. Intel 8255 is a …… pin IC.

1. 1. 34

   
   
   

   2. 40

   
   
   

   3. 25

   
   
   

   4. 20

   
   
   

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1. View Hint View Answer Discuss in Forum

   40

   Correct Option: B

   40

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90. What is the IC number of the programmable peripheral interface?

1. 1. Intel 8255

   
   
   

   2. Motorola 8255

   
   
   

   3. Intel 8155

   
   
   

   4. Intel 8237

   
   
   

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1. View Hint View Answer Discuss in Forum

   Intel 8255

   Correct Option: A

   Intel 8255

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