Hi, I'm trying to communicate with a device throught and 8 bit multiplexed data/address bus. I found some things in the piclist from 1999, mentioning the PIC17c4x which has something in that region. However, I need to on another type, a PIC16 or PIC18. Further complication, it's not external memory, it's another microprocessor (a Beck IPC@CHIP). Any idea's on this kind of high speed communications? Is it possible to 'bit-bang' this kind of high speed communications? Regards, Claudio Tagliola -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu