There are several examples of using 2400 with the 12CXX series on the web - try Dennis Clark's page for a start http://www.verinet.com/~dlc/projects/botproj.htm#serserv. I have used it with serial LCDs at 9600 - for debug, but the strings have been very short. Dan -----Original Message----- From: Bruce Cannon To: PICLIST@MITVMA.MIT.EDU Date: Thursday, August 12, 1999 6:04 PM Subject: RS232 possible using internal oscillator? >Hello: >Reading the specs for 12Cxx, looks like calibrated osc value can vary nearly >+-500kHz. Has anyone used these parts (with internal osc) for serial comm, >and if so, how? > >Bruce Cannon >Style Management Systems >1228 Ceres ST Crockett CA 94525 >(510) 787-6870 >http://www.jps.net/bcannon > >Remember: electronics is changing your world...for good!