Patent ID: 7995043

Claim:
A method, executed by an Extended Display Information Data compliant display controller, for providing power to a memory device to access Extended Display Information Data stored in the memory device, the method comprising: providing power from an external power supply via a data port to the memory device to access the Extended Display Information Data while an on-board controller power supply is turned off; detecting that the on-board controller power supply is switched from off to on; determining whether a memory device access request for Extended Display Information Data from a data port has been completed; in response to detecting that the on-board controller power supply is switched from off to on and determining that the memory device access request has not been completed, completing the memory device access request for Extended Display Information Data by continuing to provide the power from the external power supply to the memory device; and in response to determining that the memory device access request for Extended Display Information Data has been completed or that no memory device access request for Extended Display Information Data from a data port has been detected, switching from providing power to the memory device from the external power supply to providing power to the memory device from the on-board controller power supply to access the Extended Display Information Data; and arbitrating memory device access requests between data ports and client devices.