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Joined:	17 May 2009
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17 May 2009 07:09:12 IST

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microcontroller 8051

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for(i=0;i<1275;i++){} here the time delay caused is 1ms when it is programmed in 8051 C microcontroller.How is it?

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Chirag Sangani

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Joined: 12 Dec 2007

Posts: 611

26 May 2009 13:12:35 IST

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A microcontroller runs at a fixed speed, usually a few MHz. Insructions like the one you mentioned above take a long time to get executed since they involve many steps. Each step itself involves many clock cylces and each clock cycle has a fixed time duration. Hence, it is possilbe that such steps may cause a time delay of arnd 1 ms. This technique is commonly used where you want a time delay but dont want to / cannot use libraries like delay.h

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