Michael Park wrote: > For output, I wait for TXSTA before writing to TXREG. You should wait for PIR1,TXIF instead. That tells you when TXREG can accept another byte. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu