> 12Fxxx: > - 4MHz internal osc, rated to 20 MHz with external clock/xtal IIRC the internal osc has far better accuracy than on other PICs, so it should be suitable for asynchronous communication. Wouter -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body