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JEDEC updates Universal Flash Storage standard

Posted: 27 Jun 2012     Print Version  Bookmark and Share

Keywords:Flash storage  standard  host controller interface 

JEDEC Solid State Technology Association, the developer of standards for the microelectronics industry, has announced the publication of key updates to its Universal Flash Storage (UFS) standard.

The new UFS v1.1 standard is an update to the v1.0 standard published in 2011. The standard is specifically tailored for mobile applications and computing systems requiring high performance and low power consumption.

JESD220A Universal Flash Storage v1.1 contains important amendments and references to the latest related MIPI Alliance specifications.

JEDEC has also published a complementary standard, JESD223A UFS Host Controller Interface (HCI) v1.1. JESD223A defines a standard host controller interface on which system designers can create a common host controller software driver layer to work with UFS host controller hardware from different manufacturers.

"The HCI functionality also enables higher performance and power efficiency by minimising the involvement of the host processor in the operation of the Flash storage sub-system."

To allow for easy transition from e�MMC technology, UFS v1.1 has implemented functionality that are compatible with e�MMC v4.51 command protocol improvements such as Context ID (grouping different memory transactions under a single ID so the device can understand that they are related), and Data Tag (tagging specific write transactions so they can be prioritized and targeted to a memory region with higher performance and better reliability).

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