Abstract: A memory device and an associated operating method are provided to implement a customized function of the memory device by using a specially designed command packet. In one embodiment, a manufacture reserved command defined by a standard protocol is used and a corresponding customized command argument is configured, so as to generate a customized command packet compatible with the standard protocol. In another embodiment, an access command defined by the standard protocol is used and an access address, which is either an illegal address or an address lying outside an addressing range of the user area of the memory device, is configured in a corresponding command argument, so as to generate an access command packet. The memory device can perform the customized function according to the customized command packet or the access command packet mention above.

Abstract: This invention is related to a multi-interface auto-switch circuit which can be implanted in a memory device. This memory device can use either the first interface or the second interface to communicate with an external device. The multi-interface auto-switch circuit comprises a power detecting and supplying module and an interface switch circuit. The power detecting and supplying module detects and receives the voltage signal from the external device and generates a corresponding electrical signal. The interface switch circuit, which connects to the power detecting and supplying module, receives the corresponding electrical signal and is controlled to connect either the first or the second interface with the external device according to the corresponding electrical signal.