Hi all, I noticed that altera uses external ic to hold the program memory is there = any advantage? =A0why use external some one can still the code. =A0how come xilinx or latt= ice program memory is internal. any idea? thanks Andre --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .