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Discussion Groups | Piclist | Can't use 4MHz on P16C765

A discussion group for the PICMicro microcontroller. Also called the Microchip PIC, this list is dedicated to the use and abuse of this fine, simple, microcontroller. Close to topic posts are welcome, ie. general electronics.

Re: Can't use 4MHz on P16C765 - Paul James E. - Oct 9 5:11:00 2003



Yes, it's because of the USB compatiblity issue. If you don't run
at 24Mhz or at 6Mhz with a 4X multiplier, you cannot maintain USB
compatibility. So, therefore, the requirement to run at 6 or 24 Mhz.

Regards,

Jim
> I'm having a problem using the 16C765. I'm currently using a 4MHz
> xtal, but my code won't run correctly on this chip compiling with
> PicBasic Pro. The spec sheet says the chip needs either a 6MHz or
> 24MHz, but my compiler doesn't support 6MHz and I just don't happen to
> have a 24MHz xtal.
>
> So my question is is there a reason why the 16C765 will not run with a
> 4MHz xtal using PicBasic Pro? I'm also using a 16F877A with a 4MHz
> for early development, and it works perfectly. >
>
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Can't use 4MHz on P16C765 - castaways3373 - Oct 9 13:26:00 2003

I'm having a problem using the 16C765. I'm currently using a 4MHz
xtal, but my code won't run correctly on this chip compiling with
PicBasic Pro. The spec sheet says the chip needs either a 6MHz or
24MHz, but my compiler doesn't support 6MHz and I just don't happen
to have a 24MHz xtal.

So my question is is there a reason why the 16C765 will not run with
a 4MHz xtal using PicBasic Pro? I'm also using a 16F877A with a 4MHz
for early development, and it works perfectly.






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