QLC UFS offers a higher bit density than traditional TLC UFS, which makes it suitable for mobile applications that require higher storage capacities, and also benefits from advances in controller technology and error correction.
KIOXIA’s new 512 gigabyte (GB) QLC UFS achieves sequential read speeds of up to 4,200 megabytes per second (MB/s) and sequential write speeds of up to 3,200 MB/s, taking full advantage of the UFS 4.0 interface speed.
The QLC UFS is intended for smartphones and tablets, as well as other next-generation applications where higher storage capacity and performance are key considerations - including PCs, networking, AR/VR, IoT, and AI.
Key features include:
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 (3~9 megabits per second), but with HS-LSS, it can be performed at a faster HS-G1 Rate A (1,248 megabits per second). This is expected to reduce the time for Link Startup by approximately 70% compared to the conventional method.
Enhances security: By utilising Advanced RPMB (Replay Protected Memory Block) for improved read and write access to security data, such as user credentials on RPMB area, and RPMB Purge to ensure discarded data may be sanitised 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.
The new QLC UFS Ver. 4.0 device integrates 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 maximum theoretical interface speeds of up to 23.2 gigabits per second (Gbps) per lane or 46.4 Gbps per device. UFS 4.0 is also backward compatible with UFS 3.1.
