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How many pins of the 8255 can be used as the I/O ports?

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+1 vote
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in Microcontroller by (14.6k points)
How many pins of the 8255 can be used as the I/O ports?

(a) 8

(b) 16

(c) 24

(d) 32

The question was posed to me in an interview for job.

I would like to ask this question from Interfacing with 8255 topic in portion AVR Microcontroller of Microcontroller

1 Answer

0 votes
by (24.2k points)
Correct option is (c) 24

The best I can explain: They are 3 ports available in the 8255 so 24 pins are available for the I/O ports pins.

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