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8051 Microcontroller (Internals, Instructions, Programming and Interfacing)
book

8051 Microcontroller (Internals, Instructions, Programming and Interfacing)

by Subrata Ghosal
May 2024
Intermediate to advanced content levelIntermediate to advanced
503 pages
17h 2m
English
Pearson India
Content preview from 8051 Microcontroller (Internals, Instructions, Programming and Interfacing)
32
I/O PORTS AND SPECIAL FUNCTION REGISTERS
3.8.1 | Comparing 8255 PPI with MCS-51 Ports
If the reader has already studied 8085 or 8086 microprocessor, then 8255 I/O port would not be unfamiliar.
However, there are some major diff erences between 8255 PPI and MCS-51 ports apart from the diff erences in
their numbers and nomenclature.
In 8255, there are three ports named A, B and C whereas in MCS-51 there are four ports designated as P0,
P1, P2 and P3. In 8255, ports were byte programmable (all 8 bits would be either input or output) whereas in
MCS-51 they are bit programmable. 8255 ports may work in any one of the three modes, namely Mode 0, Mode ...
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Publisher Resources

ISBN: 9781282655034Publisher Website