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JEDEC's flash memory standard targets mobile devices

Posted: 01 Mar 2011     Print Version  Bookmark and Share

Keywords:flash memory  Universal Flash Storage standard  UFS Host Controller Interface 

JEDEC Solid State Technology Association, previously known as Joint Electron Devices Engineering Council, has published a new standard called the Universal Flash Storage (UFS) standard that covers both embedded and removable flash memory-based storage in mobile devices such as smartphones and media tablets.

The UFS standard builds on the e.MMC standard and adds features for security, performance and power consumption.

The standard also builds on other standards such as the MIPI Alliance's M-PHY and UniPro specifications.

The UFS standard adopts the SCSI Architecture Model and command protocols supporting multiple commands with command queuing features and enabling a multi-thread programming paradigm.

In addition, a forthcoming complementary UFS Host Controller Interface (HCI) specification will allow system designers greater flexibility by simplifying the involvement of the host processor in the operation of the flash storage sub-system.

"The publication of UFS is an important milestone for JEDEC and the Industry, and represents countless hours of collaboration between memory manufacturers and principal consumer device and mobile OEMs," said Mian Quddus, chairman of the JEDEC Board of Directors and the JC-64 Committee for Flash Memory Modules. He added, "Since UFS provides for both embedded and removable card formats the interface is the same for both, which simplifies controller design—an attractive feature for device designers."

Joel Huloux, chairman of the MIPI Alliance Board of Directors, said: "MIPI is pleased to have collaborated with JEDEC on the inclusion of M-PHY and UniPro specifications as the interconnect layer for UFS. Together, these standards represent a revolutionary advancement for future mobile device performance."

In addition to UFS development work within JEDEC, some major participants have founded a new organisation, the Universal Flash Storage Association (UFSA), to develop an ecosystem and support environment for UFS devices and host applications.

The basic initial data throughput supported is 300MBit/s, and the standard also supports command queuing features to raise random read/write speeds. JESD220 UFS may be downloaded free of charge from the JEDEC website.

- Peter Clarke
  EE Times

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