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amitdandyan
Joined: 08 May 2009
Posts: 14
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 23 Sep 2009 10:48 Minimum Delay using a PIC? |
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| Can anyone please tell me, what is the minimum delay I can get using a PIC ? I want a delay of 500ns.....Please also specify the series of the PIC...
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btbass
Joined: 20 Jul 2001
Posts: 1187
Helped: 113
Location: Oberon
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23 Sep 2009 17:13 Re: Minimum Delay using a PIC? |
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The minimum delay would be one 'nop()' instruction.
Which with a 4 Meg oscillator would give you 1uS delay.
An 8 Meg oscillator would give you your 500nS delay.
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23 Sep 2009 17:13 Ads |
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amitdandyan
Joined: 08 May 2009
Posts: 14
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06 Oct 2009 10:07 Re: Minimum Delay using a PIC? |
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void main()
{
TRISB = 0;
PORTB = 0;
for(;;)
{
PortB.F0 = 0;
asm
NOP;
PortB.F1 = 1;
}
}
I have developed this program to get the minimum delay from PIC16F876-A.....I hv used a crystal of freq. 20MHz.....but i hv not been able to solve the purpose...as no output is visible on Oscilloscope....!!!!!!!!!!!!!!!!!!!
Please help...
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madhan7710
Joined: 19 Jun 2007
Posts: 13
Helped: 1
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06 Oct 2009 10:57 Re: Minimum Delay using a PIC? |
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Hi,
Try giving equal delay for both on cycle and off cycle.
like this...
loop:
portb.0 =0
nop
portb.0 =1
nop
goto loop
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