Can the FX be run at 48 MHZ without an external EEPROM?

Question: Can the FX be run at 48 MHZ without an external EEPROM?

 

Answer:

The 8051 clock rate is fixed at 24 or 48 MHz at boot time according to the EEPROM contents, and cannot subsequently be changed by the 8051. If no EEPROM is present the default value is  zero, selecting 24-MHz operation.