REMOVABLE MEMORY CARD DISCRIMINATION SYSTEMS AND METHODS

摘要

Removable memory card discrimination systems and methods are disclosed. In particular, exemplary embodiments discriminate between secure digital (SD) cards and other removable memory cards that comply with the SD form factor, but support the Universal Flash Storage (UFS) protocol. That is, a host may have a receptacle that supports the SD card form factor and is configured to receive a device. In use, a removable memory card is inserted into the receptacle and, using an SD compliant interrogation signal, the host interrogates a common area on the card so inserted. The common area includes information related to capability descriptors of the card. An SD compliant card will respond with information such as capability descriptors about the SD protocol capabilities, while a UFS compliant card will respond with an indication that the card is UFS compliant. The host may then restart the communication with the card using the UFS protocol.

主权项

1. A method for discriminating between removable memory cards configured to communicate with a host system according to different communication protocols placed into a host of a computing device, comprising:
the host sending a secure digital (SD) compliant interrogation signal to a common area on a removable memory card; the host receiving a capability descriptor stored in the common area from the removable memory card if the removable memory card is SD compliant; and the host receiving an indication that the removable memory card is Universal Flash Storage (UFS) capable if the removable memory card is UFS protocol compliant.