Saturday, 21 December 2013

AVR--Alf (Egil Bogen) and Vegard (Wollan)'s RISC processor

* AVR is a modified Harvard architecture RISC  single chip micro controller
*It is a 28 pin narrow DIP IC
*Developed by Atmel in 1996
*AVR introduce the flash program memory for programming
*Atmega16 is equipped with an internal oscillator for driving its clock.

AVR microcontrollers are available in three categories:
1.      TinyAVR – Less memory, small size, suitable only for simpler applications
2.      MegaAVR – These are the most popular ones having good amount of memory (upto 256 KB), higher number of inbuilt peripherals and suitable for moderate to complex applications.
3.      XmegaAVR – Used commercially for complex applications, which require large program memory and high speed.

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