PCI-SIG and the SD Association have announced a partnership with the signing of a Memorandum of Understanding to advance the new SD Express memory card as a component in the PCIe ecosystem. SD Express technology is equipped with both an SD legacy protocol and a PCIe interface, claiming transfers rates of up to 985MB/s. It is also backward compatible with existing SD hosts in the market.
SD Express uses the PCIe 3.0 specification, allowing it to deliver the necessary performance levels required of use cases such as mobile and client computing, imaging, IoT and automotive applications. The SD Express interface and initialization process is also extremely flexible. Hosts that support an SD Express product will be able to initialize the card through either a legacy SD or PCIe interface.
Power-wise, the maximum consumption from a host using SD Express is quoted at 1.80 watts, which represents the accumulated wattage from the two power supplies.
PCI-SIG and the SD Association indication the following further details of SD Express:
As for the details of the partnership, the Memorandum of Understanding indicates that PCI-SIG and the SD Association will collaborate on a technical interchange related to SD Express and SD Express Test Guidelines and also information related to PCIe electrical certification of SD Express products. They will also form the PCI-SDA Advisory Team and the SD-PCIe Technical Group, which consist of members from both SDA and PCI-SIG.
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