Josh,
with 4MHz, 19200 is the greatest reliable value for usart in
asynchronous mode. ( maybe it works, but I can't obtain more )
at 10MHz you may get 115200 )
As a game, you could overclock, some chips are working up to 10 MHz
But no one from this list will encourage to do this.
Vasile

On Thu, 25 Oct 2001, Josh Koffman wrote:

> Hi all. I know there have been discussions about overclocking the
> f84-04, but has anyone overclocked the f87x? Specifically the 16f877-04?
> I want to take it up to 20Mhz, and I'm wondering if it will work. Also,
> at those speeds, will I run into problems if I try to breadboard? Now my
> final question, can I receive a 250kps data stream using the UART if my
> clock is at 4Mhz? Will the buffer overflow if I'm not exceedingly quick
> in my processing of the data? I also don't want to spend 90% of my time
> in the ISR actually receiving the data.
>
> Thanks,
>
> Josh Koffman
>
> --
> http://www.piclist.com hint: PICList Posts must start with ONE topic:
> [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads
>
>

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics