> Hi guys,
>
> I'm trying to use my PIC16F687's Tx port on the EUSART as a dual
> function pin, ie as a connect detect input and as a Tx channel.
>
> So here's the question, what's the maximum safe loading on the Tx
> port when its doing RS232, I'm imagining its in the region of 2mA,
> but I can't find any details on the datasheet, and its seems unlikely
> it would match the 20mA of the GPIOs...
>
> Thanks - you lot are the best....
>
> Ed
>
> Oh wont be running above 57.6k, incase that's at all relevant, and
> I'm at 3.3v


I don't see why they'd use different pin drivers for different
peripherals, so I think it's the same for the USART as for general I/O. Of
course at 3.3V, you can't get the 25mA you can get at 5V, but that's not
the USART's problem.

Harold


-- 
FCC Rules Updated Daily at http://www.hallikainen.com
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist