These devices deliver fast embedded storage transfer speeds in a small package size and are targeted to a variety of next-generation mobile applications, including leading-edge smartphones. The improved performance enabled by KIOXIA’s UFS products allows these applications to take advantage of 5G’s connectivity benefits, leading to faster downloads, reduced lag time and an improved user experience.
UFS Ver. 4.0 devices from KIOXIA integrate the company’s BiCS FLASH 3D flash memory and a controller in a JEDEC-standard package. UFS 4.0 incorporates MIPI M-PHY 5.0 and UniPro 2.0 and supports theoretical interface speeds of up to 23.2Gbps per lane or 46.4Gbps per device. UFS 4.0 is backward compatible with UFS 3.1.
Key features include:
- Performance improvement over previous generation: +18% sequential write, +30% random write and +13% random read
- Supports High Speed Link Startup Sequence (HS-LSS) features: With conventional UFS, Link Startup (M-PHY and UniPro initialisation sequence) between device and host is performed at low-speed PWM-G1 (3~9Mbps[4]), but with HS-LSS, it can be performed at a faster HS-G1 Rate A (1248Mbps). This is expected to reduce the time for Link Startup by approximately 70% compared to the conventional method.
- Enhances security: By utilising Advanced RPMB for faster read and write access to security data, like user credentials on RPMB area, and RPMB Purge to ensure discarded data is sanitized securely and rapidly
- Supports Extended Initiator ID (Ext-IID): Intended to be used with Multi Circular Queue (MCQ) at the UFS 4.0 host controller for improved random performance.
