> I need a small microcontroller to do some simple manipulation of data on
> two serial ports.  The bit rates (57,600bps and 19,200bps) rule out bit
> banging,

Nonsense!  You could use the hardware UART for 57.6Kbuad and software for
19.2Kbaud.  There should be no problem with that.

> As far as I can see, the obvious contenders are the top-end 18F series
> PICs (e.g. 18F6620)

Another possible solution is to use two small PICs that communicate
between themselves.  Two 16F628 come to mind.


*****************************************************************
Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.