Patent ID: 7257660
Filing Date: 2007-08-14
Classification: G06K

Abstract:
1. A memory card having a SECURE DIGITAL (SD) interface at one end and a MEMORY STICK (MS) interface at the opposite end for communicating with an SD card reader and an MS card reader respectively, comprising; a function module; a controller coupled to the function module for accessing; an SD I/O buffer coupled to the controller for sending a command (CMD) control signal, the SD I/O buffer including a first pull-down resistor for providing a first voltage level to the CMD control signal; and an MS I/O buffer coupled to the controller for sending a bus status (BS) control signal, the MS I/O buffer including a first pull-up resistor for providing a second voltage level to the BS control signal, wherein, when the memory card is inserted into an SD card reader having a second pull-up resistor, the first pull-down resistor and the second pull-up resistor are coupled to provide the CMD control signal with a high voltage level, wherein the controller determines that the memory card is inserted into an SD card reader and thus enables the SD interface for communicating with the SD card reader, and wherein, when the memory card is inserted into an MS card reader having a second pull-down resistor, the first pull-up resistor and the second pull-down resistor are coupled to provide the BS control signal with a low voltage level, wherein the controller determines that the memory card is inserted into an MS card reader and thus enables the MS interface for communicating with the MS card reader.