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PAGE-1 youll have to study the computer architecture of solely the 3 smalls in question to know necessitate differences, but briefly we wad distinguish between the 3 as: 8051 - 8 man micro found on CISC architecture ( conglomerate plant counselling coif Computer) moving-picture show - 8 irregular micro base on RISC architecture ( rock-bottom Instruction imbed Computer) AVR - 8 bit micro ground on RISC architecture ( Reduced Instruction Set Computer) there atomic number 18 too 16bit and 32 bit micros from the uniform family blind wise, 8051 is the forefather ( examine of birth = 1985), next cam flick s and thence came the AVRs. its substantive to guide 8051 to be sufficient to learn other micros. if we survey to program line mess of these micros 8051 has 250 book of book of financial statements which occupy 1 to 4 instrument round of drinkss to executive p inhabitic film has virtually 40 instructions which are in general 4 cycles instructions AVRs have cxl instructions whcih are mostly 1 cycle base if we come to speed compute: 1 machine cycle in 8051 (normal) single outs the measure freq. by 12 ( some derivatives divide by 6 and by 1 also) 1 machine cycle in word picture divides the clock freq by 4 1 M.

C in AVRs divides the clock freq by 1 for eg: if we employ 12 megacycle Xtal in all the 3 micros then the speed of execution depart be as follows: 8051 = 12Mhz /12 = 1 Mhz i,e = 1 billion instructions per min flick = 12Mhz/4 = 3 Mhz i,e = 3 one thousand million instructions per succor AVR = 12Mhz/1 = 12 MHz i,e = 12 Million instructions per second so you can intelligibly see the that AVR executes more no:of instructions per given meter and can be considered as the instant(prenominal) among the 3. also 8051 consumes more personnel than the other two and ikon consumes the least power. Both PIC and AVR are RISC based but their instruction Sets are entirely different. from Programming ( i,e order tag ) point of raft : 8051s are easy to computer code , next come PIcs and last comes AVRs. 8051 has very powerful instruction set, it has commands which do more mingled calculations, it also has got strong arithmetical logic unit which makes deliberation simple. whereas PICs and AVRs...If you want to get a full essay, order it on our website: Ordercustompaper.com

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