e.MMC

e.MMC v5.01

In July 2014 JEDEC published the latest version of its popular e.MMC standard: JESD84-B50.1: Embedded MultiMediaCard (e.ŸMMC), Electrical Standard (5.01). JESD84-B50.1 is a minor revision of the prior version, JESD84-B50 (e.MMC v5.0), which was published in September 2013.  JESD84-B50.1 is available for free download from the JEDEC website:  http://www.jedec.org/standards-documents/results/jesd84-b50.1

About e.MMC v5.0

e.MMC v5.0 defines several new functionalities and enhancements for embedded mass-storage flash memory widely used in smartphones and other mobile devices; and matches the challenging performance targets required by the next generation of mobile systems by introducing an HS400 mode that offers additional improvement in terms of interface speed (up to 400 MB/s vs 200 MB/s in the prior version). 

In response to requests from Industry users, e.MMC v5.0 includes a Field Firmware update procedure which allows loading and installing a new version or a patch of the e.MMC device controller firmware when the device itself is operational in the final system. In addition, Production State Awareness may be used during the production phase, and defines how to inform the device about specific phases such as content pre-loading, soldering, and integration in the final system.

e.MMC v5.0 also proposes some enhancements designed with the end user in mind, including register fields that can be utilized to collect device lifetime statistics via the Device Health Report feature. A safer power mode transition to Sleep state via software is possible through Sleep Notification.

Link to the product standard: JESD84-A441.

 

About e.MMC

Designed for a wide range of applications in consumer electronics, mobile phones, handheld computers, navigational systems and other industrial uses, e.MMC is an embedded non-volatile memory system, comprised of both flash memory and a flash memory controller, which simplifies the application interface design and frees the host processor from low-level flash memory management. This benefits product developers by simplifying the non-volatile memory interface design and qualification process – resulting in a reduction in time-to-market as well as facilitating support for future flash device offerings. Small BGA package sizes and low power consumption make e.MMC a viable, low-cost memory solution for mobile and other space-constrained products. 

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Standards and Documents Assistance

Contact Julie Carlson, 703-624-9230