I would like to know if it is possible to read the PROM of this chip to program other chips with the same firmware. I only have one programmed microcontroller.
Are you planing to program multiple FX3 with the same firmware? Are you using EEPROM/FLash to save the program image? If so, you can copy the the EEPROM content to other EEPROMs.
Please clarify your requirement with a block diagram.
Retrieving data ...