tag3 is wired to the eeprom by default. you can follow the procedure to recover a corrupted tag by pressing sw5 (boot rom) while doing a power reset. this will not boot from eeprom apparently. if you want to have a permanent fix, cut the power supply off to the eeprom by removing a resistor rdx. refer to tag3 user manual on which resistor to de-solder.
any reason why you want to do so?
I have already tried to remove the resistor for powering the eeprom. But then the tag3 could not be programmed. I don't know why the eeprom is exactly needed. Can you explain me?
No, unfortunately, this is not supported. You must use serial flash or EEPROM.