> How do I drive all the I/O ports of the PIC16F877 Micro to > hi-impedance? You start by reading the manual, paying particular attention to the TRIS registers. ***************************************************************** 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