JEDEC® updates Universal Flash Storage (UFS) and supports memory interface standard

ARLINGTON, Va.–(BUSINESS WIRE)–JEDEC Solid State Technology Association, the global leader in developing standards for the microelectronics industry, today announced the release of JESD220F: Universal Flash Storage 4.0. In addition, an update to the JESD223E UFSHCI 4.0 companion standard and a new related standard for UFS version 3.1 and above, JESD231 File Based Optimization, have also been released. Developed for mobile applications and computing systems requiring high performance with low power consumption, UFS 4.0 introduces significant improvements in bandwidth and data protection over the previous version of the standard. All three standards can be downloaded from the JEDEC website.

UFS is a high performance interface designed for use in computing and mobile systems such as smart phones and tablets where power consumption needs to be minimized. Its high-speed serial interface and optimized protocol greatly improve mobile system throughput and performance. UFS 4.0 and UFSHCI 4.0 together define the following major improvements over the previous version of the standard:

  • To achieve the highest performance and most energy-efficient data transport, JEDEC UFS relies on industry-leading MIPI® Alliance specifications to form its interconnect layer. This collaboration continues with UFS 4.0, which leverages the M-PHY® Specification Version 5.0 and UniPro® Specification Version 2.0 to double the bandwidth of the UFS interface and enable up to ~4.2 GB/s for traffic of reading and writing.

  • Introducing Multi-Ring Queue Definition for More Demanding Storage I/O Patterns

  • Advanced RMPB interface helps increase bandwidth and secure data protection

Additionally, UFS 4.0 offers several enhancements designed to increase overall device capacity, power efficiency, and ease of integration with tomorrow’s cutting-edge solutions:

  • Uses a more efficient VCC=2.5 V as opposed to the 3.3 V supported in the previous version of the standard

  • Improved system latencies by enabling high-speed link startup, out-of-order data transfer, and BARRIER command

  • Eases system integration by introducing enhanced device error history with host-configurable timestamps and M-PHY’s eye monitor

  • Preserves backward compatibility with UFS 3.1 and 3.0 to enable mixed system applications

Finally, as an optional extension to UFS version 3.1 and above, the new JESD231 file-based optimization standard allows a host to throttle read traffic based on file system information provided by the host.

“JEDEC members are dedicated to developing the standards needed to support the mobile devices of the future,” said Mian Quddus, Chairman of the JEDEC Board of Directors and JC-64 Committee for Integrated Memory Storage and removable memory cards. He added, “Ongoing efforts to continually improve UFS and its associated standards will in turn enable significant advancements in device performance and improved user experience.”

Industry support

“By collaborating with JEDEC, we are advancing memory standards like UFS4 for a range of emerging applications,” said Thierry Berdah Kraz, director of product management at Cadence. “Cadence supports early adoption of the standard and helps customers accelerate verification at the IP and SoC levels when developing complex memory designs with optimal performance and power efficiency.”

Kioxia is very honored to be part of the team helping to standardize this latest UFS release. We know that the significant performance increase and new features added to UFS4.0 will certainly result in a new round of improved user experiences as the UFS adaptation expands to even more applications,” said said Atsushi Inoue, Senior Manager, Memory Division, KIOXIA Corporation. .

“UFS 4.0 will be a game-changer for NAND flash storage in smartphones,” said Raj Talluri, senior vice president and general manager of Micronthe mobile business unit of . “Offering incredibly fast read and write speeds that dramatically reduce application and game load times, as well as improved power efficiency, UFS 4.0 has the potential to deliver significant improvements that will enable future user experiences and emerging mobile applications.”

“With the rapid advancements in the design of smartphones and other consumer devices, mobile storage solutions have also had to evolve rapidly to meet increased speed and bandwidth requirements,” said Kyungryun Kim, vice president of the NAND memory planning/activation group at Samsung Electronics. “With twice the performance of UFS 3.1, the new UFS 4.0 JEDEC standard will be key to powering the latest innovations in mobile technology.”

“High-performance interfaces such as UFS 4.0 continue to be essential to meet the growing demands for faster bandwidth, lower power consumption and built-in security in mobile devices,” said John Koeter, vice-president. Chief Marketing and Strategy Officer, Synopsys Solutions Group. “Synopsys UFS 4.0 IP has been adopted by several leading mobile customers and, when combined with the Synopsys UniPro Controller, M-PHY IP and Verification IP, provides a complete solution that accelerates the integration of required functionality, reduces design risks and facilitates the development of energy-efficient and secure SoCs for mobile applications.


JEDEC is the world leader in the development of standards for the microelectronics industry. Thousands of volunteers representing more than 340 member companies work together in more than 100 JEDEC committees and working groups to meet the needs of every segment of industry, manufacturers and consumers. Publications and standards generated by JEDEC committees are accepted worldwide. All JEDEC standards can be downloaded from the JEDEC website. For more information, visit

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