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Questions and Answers
Which port of 8255 PPI is further divided into two 4-bit ports?
Which port of 8255 PPI is further divided into two 4-bit ports?
- Port A
- Control group A
- Port B
- Port C (correct)
In how many modes can Port A work in the input-output mode of 8255 PPI?
In how many modes can Port A work in the input-output mode of 8255 PPI?
- 1
- 4
- 3 (correct)
- 2
Which is the general purpose programmable I/O device designed to interface the CPU with its outside world?
Which is the general purpose programmable I/O device designed to interface the CPU with its outside world?
- Port C
- Port B
- Control group A
- PPI 8255 (correct)
How many control groups does 8255 PPI have?
How many control groups does 8255 PPI have?
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Which I/O ports of 8255 PPI are bidirectional?
Which I/O ports of 8255 PPI are bidirectional?
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Study Notes
8255 PPI Characteristics
- Port C of the 8255 PPI is further divided into two 4-bit ports.
- Port A can work in two modes in the input-output mode of the 8255 PPI.
- The 8255 PPI is a general purpose programmable I/O device designed to interface the CPU with its outside world.
- The 8255 PPI has two control groups.
- Ports A and B of the 8255 PPI are bidirectional.
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