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Q.

8253/54 can be operated in _________ Modes?

A

3

B

4

C

5

D

6

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MCQ

1.

Which of the following uses N-MOS technology?

A

8253

B

8254

C

8255

D

8256

Discussion

MCQ

2.

Which of the following are Features of 8255A?

A

It consists of 3 8-bit IO ports i.e. PA, PB, and PC.

B

Address/data bus must be externally demux'd.

C

It is TTL compatible.

D

All of the above

Discussion

MCQ

3.

Which mode generates a strobe in response to an externally generated signal?

A

Mode 3

B

Mode 4

C

Mode 5

D

Mode 6

Discussion

MCQ

4.

How many ports 8255A has?

A

2

B

3

C

4

D

5

Discussion

MCQ

5.

Which of the following is responsible for controlling the internal/external transfer of data/control/status word?

A

Data Bus Buffer

B

Read/Write Control Logic

C

CS

D

WR

Discussion

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