SD Express

Silicon Motion has announced their first SD Card controller to support the NVMe-based SD Express interface. The new SM2708 controller is capable of sequential transfer speeds of 1700 MB/s, vastly higher than the 104 MB/s most SD devices and cards are limited to using the older but widely-supported UHS-I interface. In 2018, version 7.0 of the SD specification introduced the PCIe and NVMe-based SD Express interface as the new way forward for SD cards. The older UHS-II and UHS-III interfaces developed in versions 4 through 6 of the SD standard and capable of speeds from 156 MB/s to 624 MB/s were abandoned in favor of a single lane of PCIe gen3 (~985 MB/s). Last year, version 8.0 of the SD specification added support for PCIe...

Phison Develops PS5017 Controller for SD Express & MicroSD Express Cards

In order for the SD 7.0/7.1 (aka SD Express) ecosystem to take off, a number of things are needed, but aside from specification itself, availability of controllers for card...

18 by Anton Shilov on 6/14/2019

Realtek Showcases RTS5261 SD Express Controller, up to 128 TB at 1GB/s

Last year the SD Association published its Secure Digital 7.0 standard that defines SD Express cards. At this year’s Computex, Realtek demonstrated one of the industry’s first SD Express...

11 by Anton Shilov on 6/14/2019

SD Association Announces SD 7.0 Spec & SD Express Interface: PCIe + NVMe, Up to 985 MB/s

The SD Association - the body responsible for defining the standards for Secure Digital cards - has made it no secret that the organization has been working on a...

24 by Anton Shilov on 6/28/2018

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