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Tuesday, May 3, 2016

Microcontroller

A microcontroller is a complete microprocessor system ,containing of microprocessor ,limited amount of ROM RAM and parallel I/O ports ,built on a single integrated circuit .
Microcontroller is in fact a microcomputer ,but it is called so because it is used to perform control functions .
Expanded features of 8052 over 8051 microcontroller are as follows:
a) ROM :- Microcontroller 8052 has 8 KB bytes onboard ROM or EPROM whereas 8051 has 4 KB bytes of ROM .
b) RAM :- Microcontroller 8052 has 256 bytes of onboard RAM whereas 8051 has 128 bytes of RAM.
c) Time event counter :- 8052 has an extra 16 bit time event counter whereas 8051 has a dual 16 bit time event counter.