Question: Is the EA (External Access) pin in the EZUSB, EZ-USB FX and EZ-USB FX2 "live"? Can this be set to 0, allowing initial EEPROM bootload and switch to 1 after firmware is downloaded?
Although technically this is possible, the EA pin of EZ-USB parts was not designed to be used in this way. We do not recommend this. Design based on this is not guaranteed functionality.