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microSD Express Memory Card for Mobile Devices Supports 985 MBps Speeds

microSD Express Memory Card for Mobile Devices Supports 985 MBps Speeds

Smartphones Feb 25,2019 0

The SD Association announced today microSD Express, offering the PCI Express and NVMe interfaces alongside the legacy microSD interface for backwards compatibility.

Like SD Express, microSD Express uses the PCIe interface delivering a 985 megabytes per second (MB/s) maximum data transfer rate and the NVMe upper layer protocol enables advanced memory access mechanism, enabling a new world of opportunities for mobile devices.

microSD Express cards defined in the SD 7.1 specification will be offered in a variety of capacities such as microSDHC Express, microSDXC Express and microSDUC Express.

microSD Express uses the PCIe 3.1 and NVMe v1.3 specifications defined by PCI-SIG and NVM Express, respectively, on the second row of pins. PCIe 3.1 includes the low power sub-states (L1.1, L1.2) enabling low power implementations of SD Express for the mobile market. In addition, SD Express cards with significantly higher speed data transfer rates are expected to consume less energy than traditional microSD memory cards while keeping the same maximum consumed power. The cards provide system developers new options offered by PCIe and NVMe capabilities, such as Bus Mastering, Multi Queue (without locking mechanism) and Host Memory Buffer.

The SDA released visual marks to denote microSD Express memory cards to make matching the card and device easier for optimal device performance.

Tags: microSD ExpressSD Association
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