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Microcontroller

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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.
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C Program to Create Employee Record and Update it

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    /*      * C Program to Create Employee Record and Update it      */     #include <stdio.h>     #include <stdlib.h>     #include <string.h>     #define size 200      struct emp     {         int id;         char *name;     }*emp1, *emp3;          void display();     void create();     void update();          FILE *fp, *fp1;     int count = 0;          void main(int argc, char **argv)     {         int i, n, ch;             printf("1] Create a Record\n");      ...
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