Have you heard about the latest advancements in Universal Flash Storage1 (UFS)? The advanced capabilities are not just designed for our everyday mobile gadgets but also for automotive, surveillance and AI applications, to name a few. The recent UFS 4.0 / UFS 4.1 specifications are quite the game-changers, enabling the fastest storage transfer speeds yet. Imagine what that could mean for future smartphones, mobile devices, cameras and vehicles, especially with 5G networks and AI capabilities blossoming.
UFS 4.0 / UFS 4.1 managed flash devices2 utilize MIPI®, M-PHY® and UniPro® technologies to connect to application processors, with ultra-fast data transfer speeds. We're talking about speeds up to 23.2 gigabits3 per second (Gbps) per lane and 46.4 Gbps per device. These devices are also backward compatible, so upgrading devices from UFS 3.1 won't be an issue. Here's what UFS 4.0 / UFS 4.1 brings to the table and why it's worth the hype:
UFS 4.0 / UFS 4.1 doubles the data transfer speed when compared to UFS 3.1. It means faster read/write speeds and reduced latency, enhancing the overall performance of compliant devices. Whether you're transferring big files, photos, videos, etc., or need fast access to large amounts of data, up to twice the transfer speed is a major benefit.
Enhanced transfer speed is crucial for automotive applications that need to support video and fast processing of LiDAR4 and sensor/camera vision information that help to deliver safe driving experiences. Other applications such as immediate Over-The-Air (OTA) updates, on-device AI processing, real-time data analysis and smoother AR/VR immersive experiences all benefit from enhanced transfer speed and a higher level of read/write performance.
Another capability introduced in UFS 4.0 / UFS 4.1 is High-Speed Link Startup Sequence (HS-LSS) technology that enables compliant devices to boot up and initialize much faster5. This capability is particularly well suited for smartphones, gaming consoles, PCs/tablets, automotive systems, POS systems, and industrial devices waking up from sleep mode.
Another performance feature introduced in the UFS 4.0 / UFS 4.1 Host Controller Interface is Multi-Circular Queue (MCQ) that allows the host to set priorities for I/O commands based on specific tasks. MCQ delivers fast and efficient multitasking of complex data tasks and provides a performance boost for devices that require fast and distributed data access across multiple applications.
In the current UFS 4.1 specification, the WriteBooster feature is updated so that the buffer can be resized and partially flushed, providing users with the ability to retain specific data without flushing all of it to normal storage. The WriteBooster partial flush enables the buffer to have faster access to specific data, which in turn enhances overall read performance and allows the buffer size to be optimized for each use case.
Lastly, earlier UFS specifications employed the Replay Protected Memory Block (RPMB) capability to keep passwords, critical business data and other important content protected from hackers and cyberattacks. Since consumers are storing more and larger sizes of sensitive content on their mobile devices, UFS 4.0 / UFS 4.1 implements more robust data security through RPMB. The first is Advanced RPMB that protects larger data sizes per I/O transaction. The second is RPMB Purge that limit purge operations to RPMB and erase secure data faster when compared with existing purge operations.
UFS 4.0 / UFS 4.1 are set to revolutionize how we use our smartphones and other mobile devices, making them faster, more efficient and more secure. For further information, access the Top 5 Reasons link available here.
FOOTNOTES:
1 Universal Flash Storage (UFS) devices are based on the UFS specification, of which, the Ver. 4.0 specification is the current release issued by JEDEC and published in August 2022. UFS 4.1 was announced by JEDEC® on January 8, 2025.
2 A managed flash device combines raw NAND flash memory and an intelligent controller in one integrated package, enabling internal memory management.
3 Definition of capacity: Kioxia Corporation defines a kilobyte (KB) as 1,000 bytes, a megabyte (MB) as 1,000,000 bytes, a gigabyte (GB) as 1,000,000,000 bytes, a terabyte (TB) as 1,000,000,000,000 bytes and a petabyte (PB) as 1,000,000,000,000,000 bytes. A computer operating system, however, reports storage capacity using powers of 2 for the definition of 1Gbit = 230 bits = 1,073,741,824 bits, 1GB = 230 bytes = 1,073,741,824 bytes, 1TB = 240 bytes = 1,099,511,627,776 bytes and 1PB = 250 bytes = 1,125,899,906,842,624 bytes and therefore shows less storage capacity. Available storage capacity (including examples of various media files) will vary based on file size, formatting, settings, software and operating system, and/or pre-installed software applications, or media content. Actual formatted capacity may vary.
4 LiDAR stands for Light Detection and Ranging.
5 It is expected that the UFS 4.0 / UFS 4.1 High-Speed Link Startup Sequence technology can reduce the time for link startups by approximately 70% when compared to UFS 3.1 based on internal testing conducted by Kioxia Corporation.
TRADEMARKS:
JEDEC is a registered trademark of the Joint Electron Device Engineering Council (JEDEC) Solid State Technology Association. MIPI, M-PHY and UniPro are registered trademarks owned by MIPI Alliance. All other company names, product names and service names may be trademarks of third-party companies.
Information in this blog, including product specifications, tested content, and assessments are current and believed to be accurate as of the date of this publication, but is subject to change without prior notice. Technical and application information contained here is subject to the most recent applicable KIOXIA product specifications.