Patent ID: 6370642
Filing Date: 2002-04-09
Classification: G06F

Abstract:
A data communications device for supporting interface between communications media and an embedded system having an embedded controller, an extension ROM, and an EEPROM programmable with ROM size data representing a selected size of the extension ROM, the communications device comprising:a bus interface for providing interface with the embedded controller via a data bus, an EEPROM interface for providing interface with the EEPROM, a ROM range register coupled to the EEPROM interface for receiving the ROM size data from the EEPROM, a ROM base address register coupled to the bus interface for receiving a predetermined value from the embedded controller, and a logic circuit coupled to the ROM range register and the ROM base address register for performing a logic operation on their values, the embedded controller being responsive to an output value of the logic circuit for determining the selected size of the extended ROM.