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Why is __delay_ms (2500) not exactly 2.5s on 16F877A ?

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bianchi77

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Guys,

Why is __delay_ms (2500) not exactly 2.5s on 16F877A ?
and after few loops , why is it freezing ?
Something wrong with my clock and configuration ?

thanks
 

Hi Friend,

Inbuilt delay might vary based on your clock and oscillator settings. Have you tried with any other time delay value?
 

Hi there,

This is a sample inbuilt configuration setting example. I am recommending you to please refer PIC16F877A main datasheet(Clock and configuration setting section).

#define _XTAL_FREQ 4000000

__CONFIG(INTCLK & WDTDIS & PWRTDIS & MCLRDIS & UNPROTECT & DUNPROTECT & BORDIS & IESODIS & FCMDIS & LVPDIS);
__CONFIG(BORV40);


Please go through it.

https://www.edaboard.com/threads/210298/
 

Hi friend
I invite you to use timer for make exact delay
 
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