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The maximum freq. signal that can by applied to 89C52 pins

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sivamit

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Interrupt frequency

Hi friends,
What is the maximum frequency signal we can apply at the interrupt pins of 89c52 microcontrollers. Im using a crytal of frq 11.0592 MHz.
 

Interrupt frequency

It depend on interrupt routine code size.
if number of code executed in interupt service routine is small, you can use higher frequency.
it is because of compeletion interrupt routine before next interrup comming.
 

Re: Interrupt frequency

Hi, If you do some good coding in ASM and I assume your interrupt routine only takes some 100us than its: 1/((12 / 11.0592 * 10E6) * 100) = 9216 interrupts/sec

regards,

Paul.
 

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