PAUSEUS command

My last question for the day ! The PBP manual gives minimum times for different oscillator speeds (eg 24us for4MHz). Is this also the increment (24/48/72 etc us) and if not how do I determine what is the smallest increment I can specify ? Can I go 24 / 25 / 26 ?

Thanks, Andrew

Hi,

I'm not sure I understand the question, but here goes...

Are you asking what the minimum value for PAUSEUS can be for a given crystal?

If so, this is what I understand:

If you load PAUSEUS directly, you can go as low as 1us. For instance, "PAUSEUS 1" gives a 1us delay. However, if you are loading PAUSEUS with a variable, the minimum delay you can accomplish (with a 4MHz crystal) is 24us. This is because of the extra processing time required by the PIC to handle the variable.

Somebody please correct me if I'm wrong.

Regards,

Hello again,

Sorry, I haven't got my facts straight.
It looks like 24us is the minimum delay for PAUSEUS, whether you're using a variable or not. Please see the attached table for a list of crystal frequencies and their minimum PAUSEUS delay values.

Cheers!

Thanks for answering. I'll try and explain further - if say for a 4MHz oscillator the minimum PAUSEUS is 24us (presumably because of the number of clock cycles taken to execute the command), can I only increment in multiples of that minimum (24 / 48 / 72 / etc) or can I increment in smaller amounts and if so how do I determine that increment other than by trial and error ?

Thanks, Andrew

Hi,

OK, I understand now.
Sorry about that.

Yeah, as far as I know you can use PAUSEUS 24, PAUSEUS 25, PAUSEUS 26, etc... with accuracy.

It's just that you can't go any lower than 24us.

:)

Cheers!