Extended secure-digital (SD) devices and hosts
Systems and methods for communicating using various protocols through the Secured Digital (SD) physical interface are disclosed. The invention covers, among others, single-mode and multi-mode hosts, single-mode and multi-mode devices, as well as techniques for initializing these hosts and devices in order to facilitate the aforementioned communication.
1. A multi-protocol host configured to communicate with a device, comprising:
a receptacle configured to be at least mechanically compatible with at least one of an industry-standard Secure Digital (SD) plug and an industry-standard MultiMedia Card (MMC) plug;
a multi-protocol element coupled to said receptacle;
a plurality of protocol processors coupled to said multi-protocol element; and
a host processor coupled to said plurality of protocol processors, wherein said multi-protocol element is configured to enable, responsive to a determination that said device supports both a first protocol and an industry standard SD protocol, only one of said plurality of protocol processors to communicate with said host processor when said host is connected with said device, said one of said plurality of protocol processors supports said first protocol.
2. The multi-protocol host of claim 1 wherein said first protocol comprises one of USB, PCIE, SATA, and IEEE 1394.
3. The multi-protocol host of claim 2 wherein said first protocol utilizes one pair of pins of said receptacle to carry a first pair of differential data signals (A− and A+), and utilizes another pair of pins of said receptacle to carry a second pair of differential data signals (B− and B+).
4. A multi-protocol device configured to communicate with a host, comprising:
a plug configured to be at least mechanically compatible with at least one of an industry-standard Secure Digital (SD) receptacle and an industry-standard MultiMedia Card (MMC) receptacle disposed on said host;
a multi-protocol element coupled to said plug;
a plurality of protocol processors coupled to said multi-protocol element, said plurality of protocol processors including both a first processor for processing a first protocol and a second processor for processing an industry-standard Secure Digital (SD) protocol; and
a device processor coupled to said plurality of protocol processors, whereby said multiprotocol element is configured to enable, responsive to a determination that said host supports both said first protocol and said industry standard SD protocol, only one of said plurality of protocol processors to communicate with said device processor when said device is coupled with said host, said one of said plurality of protocol processors supports said first protocol.
5. The multi-protocol device of claim 4 wherein said first protocol comprises one of USB, PCIE, SATA, and IEEE 1394.
6. The multi-protocol device of claim 5 wherein said first protocol utilizes one pair of pins of said receptacle to carry a first pair of differential data signals (A− and A+), and utilizes another pair of pins of said receptacle to carry a second pair of differential data signals (B− and B+).
7. A single-mode device configured to communicate with a host, comprising:
a plug configured to be at least mechanically compatible with at least one of an industry-standard Secure Digital (SD) receptacle and an industry-standard MultiMedia Card (MMC) receptacle;
a protocol processor coupled to said plug, said protocol processor supporting a first protocol, said first protocol being a protocol other than one of a SD protocol and an MMC protocol; and
a device processor coupled to said protocol processor, wherein said first protocol utilizes one pair of pins of said plug to carry a first pair of differential data signals (A− and A+), and utilizes another pair of pins of said plug to carry a second pair of differential data signals (B− and B+).
8. The single-mode device of claim 7 wherein said first protocol comprises one of USB, PCIE, SATA, and IEEE 1394.
9. A single-mode host configured to communicate with a device having a plug that is mechanically compatible with at least one of an industry-standard Secure Digital (SD) receptacle and an industry-standard MultiMedia Card (MMC) receptacle, the single-mode comprising:
a receptacle configured to be at least mechanically compatible with at least one of said industry-standard SD plug and said industry-standard MMC plug;
a protocol processor coupled to said receptacle, said protocol processor supporting a first protocol, said first protocol being a protocol other than one of a SD protocol and an MMC protocol; and
a device processor coupled to said protocol processor, wherein said first protocol utilizes one pair of pins of said receptacle to carry a first pair of differential data signals (A− and A+), and another pair of pins of said receptacle to carry a second pair of differential data signals (B− and B+).