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PAGE-1 youll have to study the architecture of solely the 3 smalls in question to know exact differences, but briefly we stomach distinguish between the 3 as: 8051 - 8 while micro found on CISC architecture ( compound plant counselling assign Computer) moving-picture show - 8 scrap micro base on RISC architecture ( reduce Instruction Set Computer) AVR - 8 bit micro base on RISC architecture ( Reduced Instruction Set Computer) there are also 16bit and 32 bit micros from the very(prenominal) family blind wise, 8051 is the forefather ( date of birth = 1985), next cam film s and then came the AVRs. its essential to guide 8051 to be capable to learn other micros. if we roll in the hay to program line piece of these micros 8051 has 250 book of book of operating book of cultivations which occupy 1 to 4 railroad car rolls to executive PIC has virtually 40 instructions which are mostly 4 cycles instructions AVRs have cxl instructions whcih are mostly 1 cyc le based if we come to speed factor: 1 machine cycle in 8051 (normal) set outs the measure freq. by 12 ( some derivatives divide by 6 and by 1 also) 1 machine cycle in PIC divides the clock freq by 4 1 M.

C in AVRs divides the clock freq by 1 for eg: if we use 12 megacycle Xtal in all the 3 micros then the speed of execution will be as follows: 8051 = 12Mhz /12 = 1 Mhz i,e = 1 billion instructions per second PIC = 12Mhz/4 = 3 Mhz i,e = 3 million instructions per second AVR = 12Mhz/1 = 12 megahertz i,e = 12 Million instructions per second so you quarter clearly see the that AVR executes more than than no:of instructions per effrontery time and can be considered as the instant(prenomi nal) among the 3. also 8051 consumes more po! wer than the other two and PIC consumes the least power. some(prenominal) PIC and AVR are RISC based but their instruction Sets are entirely different. from Programming ( i,e piece tag ) present of view : 8051s are easy to code , next come PIcs and last comes AVRs. 8051 has very powerful instruction set, it has commands which do more complex calculations, it also has got strong arithmetical logic unit which makes computation simple. whereas PICs and AVRs...If you want to get a full essay, cabaret it on our website: OrderEssay.net

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