Thursday 17 November 2011

8051 microcontroller

 Features of 8051 microcontroller
  • It is an 8bit microcontroller.
  • 8bit accumulator, 8bit Register and 8bit ALU.
  • On chip RAM 128 bites (data memory).
  • On chip ROM 4 Kbytes (program memory).
  • Two 16bit counter/ timer.
  • A 16 bit dptr(data pointer)
  • Two levels of interrupt priority.
  • 4 byte bi-directional input/ output port.
  • Power saving mode (on some derivatives).
  • 16bit address bus:-it can access 2^16 memory locations:-64kb (65536) each of RAM and ROM.
  • It is an inclusion of Boolean processing system, have an ability to allow logic operations to be carried out on registers and RAM.
  • 8bit data bus:-it can access 8bit of data in one operation.
  • UART (this serial communication port makes chip to use simply as a serial communication interface).
  • It has four separate Register set. (Each contains 8 Registers (R0 to R7)).
APPLICATION
  • Widely used in industrial control applications

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