Olin Lathrop wrote: > > > Ok if totem pole outputs make it so no pullup resistor is required to talk > > to another pic, is there a pic chip with 12 pins with totem pole outputs? > > Many. Most outputs on most PICs are totem pole. RA4 is often open drain. > Check the data sheets for specifics. Might I suggest a 470 ohm series resistor anywhere you are connecting a PIC pin to another PIC pin? It may save your chips, even in cases where software is finished and reliable you can always get "cosmic glitches" that might make the two PICs try to fight each other... Hey, it does happen! :o) -Roman -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.