>> Let's say I set an interrupt enable bit to 0. While the interrupt is disabled, an event occurs which raises the interrupt flag. Once the enable bit is set to 1 (and the flag has not be reset), is the interrupt called? << Yes. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body