Patent ID: 8850086

Claim:
A secure digital (SD) switch box embedded within a cellular handset, comprising: circuitry for switching access to NAND memory that is embedded within the cellular handset, between a consumer electronic device that is external to and connected to the cellular handset and that operates as a host device for the cellular handset, and between a base band modem that is embedded within the cellular handset, so as to enable shared use of the NAND memory by the consumer electronic device and by the base band modem; two separate SD ports, comprising: a first SD port for communication between the SD switch box and the base band modem; and a second SD port for communication between the SD switch box and the consumer electronic device, wherein said circuitry receives an access grant message from the consumer electronic device via said second SD port and, in response thereto, sets a busy state on said second SD port in order to enable the base band modem to access the NAND memory, and wherein said circuitry receives a free message via said first SD port from the base band modem when the base band modem has completed its access to the NAND memory, and, in response thereto, releases the busy state from said second SD port.