I Thank you all for your educative answer.

So if I understand correctly the calculation is like that
say I am using 32,768Khz crystal
1 / 32768 = 0.0000305
0.0000305 * 4 = 0.000122sec

and if I use 4Mhz crystal
1 / 4,000,000 = 0.00000025 * 4 = 0.000001sec

am I right?


Regards

Tal Bejerano
AMC - ISRAEL


-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Jinx
Sent: Saturday, July 20, 2002 1:09 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: NOP Delay


> A friend (really new to pics) ask me about the NOP delay
> He look at some samples at piclist archive and found that
> in one sample nop gives 0.122msec
> he's question is: what cause the delay time?

Using a 32.768kHz crystal, which has an instruction time of

1000000 / (32768 / 4) = 122us

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