Can I read EEprom in circuit when connected to a SH7055 MCU?
Keep the entire board powered. You will need to pull the HSTBY and the RES pins low. This will put the external processor bus in a high impedance condition. You should then be able to exercise the EEPROM provided there are no other driver ICs on the EEPROM lines and that the EEPROM is not tied to either of the above pins.