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 readers as well as controllers for cards is crucial. Apparently, Phison had already developed its first controller for SD Express and microSD cards and even showcased prototypes of such cards at Computex. Phison’s PS5017 controller is compliant with the SD 7.1 specification, so it can be used both for SD Express and microSD Express cards. The chip supports various types of 3D TLC and 3D QLC NAND memory featuring ONFI or Toggle 2.0 interfaces, but total capacity is limited to 512 GB for some reason. Performance wise, the controller promises up to 900 MB/s sequential read...
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...12 by Anton Shilov on 6/14/2019
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