INTRODUCTION TO THE WORLD OF MICROCONTROLLERS | 8051 FAMILY

In my earlier posts I've given introduction to tha embedded systems,then moved on to the what are  microcontrollers and  diffrence between microcontrollers and microprocessors 
In this post i'll be introducing you to the world of microcontrollers and the most common 8051 family.
There are various 8 bit and even more (16 or 32 bit)  microcontrollers available,the most common is 8-bit microcontrollers and the firms manufacturing them are :
Motorola's 6811  , Intel 8051 , Microchip's pic.

Before CHOOSING a microcontroller for an embedded system,the need must be noticed and accordingly microcontrollers  configuration is choosed :

NOW coming on 8051 microcontrollers. They are the most common among microcontrollers family. A large number of firms manufactures it.
some among them are :
Intel,Atmel,Philips,amd,Matra,dallas semicontuductors,Siemens


Intel introduced its 8051 microcontrollers known by name MCS 51 in 1981

It is a8 bit microcontroller that means 8 bits of data can be processed at a time.

CONFIGURATION/FEATURES OF 8051:
1) 128 BYTES OF RAM
2) 4 KB ROM
3) TWO TIMERS
4) 4 I/O PORTS
5) 6 INTEREPPT SOURCE
6) ONE SERIAL PORT

                                       BLOCK DIAGRAM OF 8051 MICROCONTROLLERS

                                                                       8051  family

continue reading other family members

EMBEDDED SYSTEM MICROCONTROLLERS BASICS | 8051 microcontollers

In my previous post, I've given you   an introduction about embedded system and its applications
In this post I'll be introducing you to the world of microcontrollers and the most common 8051 family microcontrollers. As I have told you that embedded system is a combination of software and hardwares. Softwares deals with the task and flexibilites a system does and hardware part deals with the microcontrollers.

MICROCONTROLLERS IS OFTEN ASSOCIATED  AS MICROPROCCSESORS BUT THERE ARE SOME DIFFERENCES BETWEEN THEM.

In general purpose microprocessors there is no RAM, ROM, I/O PORTS, TIMERS and other peripherals
While  microcontrollers has
*A CPU (Microproceesor)
*RAM
*ROM
*I/O PORTS
*TIMER
*ADC (A TO D CONV.)   etc.

CLICK N IMAGE TO SEE THE ENLARGED VIEW
The image describes the microcontllrers and microprocessors. In general purpose microprocessors external ram,rom,i/o prts,timers and other peripherls need to be added to make them functional.

READ ABOUT 8051 FAMILY MICROCONTROLLERS