> I'd like to have a software routine for Microchip PICs that can be a slave > on 2 I2C addresses at the same time (composite device?). The Microchip IIC hardware can't do this, so you would have to code it manually. Unfortunately doing a IIC slave is trickier than a master because the master controls the clock. What about a second cheap PIC with IIC hardware communicating to the first PIC by some other means? ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, olin@embedinc.com, 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