Been using the 68hc11 for a long time now, this is true. At this point in time don't have the time to switch, unless there is a quick solution. Do you think my plan is a bad idea? Is there a newer chip that would accept existing code without huge translation effort? I use all of the various features offered by the 68hc11 to date except the SPI and it has worked out real good all these years, due to a new project requirement I need a large capacity flash memory seems like SPI to serial flash would be good given the new serial flash coming out now.