UFS 3.1 (Universal Flash Storage): what it is, how it works and what it does

Definition and Principles

UFS 3.1, or Universal Flash Storage 3.1, is a data storage interface designed primarily for smartphones and tablets. Unlike eMMC memories, UFS uses a single-channel architecture with multiple input/output (I/O) threads, allowing it to manage multiple read and write commands concurrently.

Architecture and Functionality

The 3.1 specification introduces significant improvements in power management and latency. Key technical features include:

• Low Power Mode (LP-0): Allows the device to keep storage active with minimal energy consumption, optimizing battery life.
• Latency Improvements: Reduces response time in read and write operations, enhancing operating system fluidity.
• NVMe Compatibility: Incorporates the NVMe (Non-Volatile Memory Express) protocol, enabling more direct and efficient communication between the processor and memory.

Applications and Scope

This standard is commonly found in mid-range and high-end devices. Its presence indicates that the device is designed to handle intensive workloads, such as high-resolution photography, video editing, and smooth operation of demanding applications.

Limitations and Interpretation

The actual speed of UFS 3.1 depends on the controller and the quality of the NAND memory cells. In practice, its performance is measured in MB/s, being significantly superior to UFS 2.1 or eMMC 5.1. The presence of this specification in a product, as seen in 128GB, 256GB, or 512GB configurations, guarantees a fast and efficient internal storage base for the end user.

Note: UFS 3.1 is not a type of RAM, but the standard for the device's internal memory (ROM).