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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 breadbasket distinguish between the 3 as: 8051 - 8 patch micro found on CISC architecture ( composite plant plant counselling inured Computer) moving-picture show - 8 slur micro establish on RISC architecture ( decreased Instruction Set Computer) AVR - 8 bit micro ground on RISC architecture ( Reduced Instruction Set Computer) there are also 16bit and 32 bit micros from the similar family blind wise, 8051 is the forefather ( date of birth = 1985), next cam ikon s and then came the AVRs. its essential to guide 8051 to be adapted to learn other micros. if we come on to program line train of these micros 8051 has 250 book of book of operating book of informations which occupy 1 to 4 cable car staves to executive PIC has virtually 40 instructions which are mostly 4 cycles instructions AVRs have cxl instructions whcih are mostly 1 cy cle based if we come to speed factor: 1 machine cycle in 8051 (normal) watersheds 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 megacycle per second i,e = 12 Million instructions per second so you kindle clearly see the that AVR executes much(prenominal) no:of instructions per given up time and can be considered as the i nstant(prenominal) among the 3. also 8051 co! nsumes more power than the other two and PIC consumes the least power. both PIC and AVR are RISC based but their instruction Sets are entirely different. from Programming ( i,e piece tag ) charge 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 building block which makes computation simple. whereas PICs and AVRs...If you want to get a full essay, narrate it on our website: OrderEssay.net

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