Designing for UFS 3.1 requires adhering to strict signal integrity guidelines to achieve the rated Gear 4 speeds (11.6 Gbps per lane). 4.1 Signal Integrity and Differential Pairing
Provides the base frequency for the M-PHY. Modern UFS 3.1 devices like those from Samsung Semiconductor require a precise reference clock to transition into high-speed modes.
It is important to note that there is no single "universal" pinout diagram for the physical BGA (Ball Grid Array) package. JEDEC defines the interface signals, but the physical ball assignment is determined by the package size and density.
| Parameter | Requirement | |-----------|-------------| | Differential impedance | 85Ω ±10% (matched to host) | | Trace length matching | Within 0.5 mm (D0_RX to D0_TX per lane; lane-to-lane within 1 mm) | | Max PCB length | ≤ 150 mm (prefer < 100 mm) | | Via count | ≤ 2 per net | | AC coupling capacitors | 100 nF (on TX lines – near UFS device) | | Reference clock routing | Single-ended 50Ω, keep away from TX/RX pairs | ufs 3.1 pinout
: The Reference Clock input. UFS 3.1 relies on an external reference clock provided by the host processor (typically 19.2 MHz, 26 MHz, 38.4 MHz, or 52 MHz) to synchronize data transmission.
The standard package for UFS 3.1 is the (11.5mm x 13mm). The ball pitch is typically 0.5mm. Below is the functional pinout categorized by signal group.
Universal Flash Storage (UFS) 3.1 is a high-performance storage standard designed for modern smartphones, tablets, and embedded systems. Operating on the JEDEC MiPi M-PHY physical layer standard, UFS 3.1 utilizes a high-speed, serial differential signaling interface. Unlike older parallel eMMC architectures, UFS enables simultaneous reading and writing (full-duplex data transfer). Designing for UFS 3
Typically multiple pins (e.g., A3, B3, C3) for current capacity. I/O Voltage Low voltage rail (1.2V typical). PHY Voltage Mid-range voltage rail (1.8V typical). Transmit Pairs
UFS 3.1 (Universal Flash Storage) standard, published by JEDEC as JESD220E, utilizes a high-speed serial interface designed to balance massive throughput with minimal power consumption. While standard storage like eMMC uses a parallel interface with many pins, UFS 3.1 employs a low pin-count serial interface
To help me tailor any further technical specifications, what specific of UFS 3.1 chip are you working with, and are you using this pinout for PCB design, data recovery, or repair ? Share public link It is important to note that there is
When comparing UFS 3.1 to UFS 2.1 or UFS 3.0, the physical pin layout remains largely backwards compatible. The primary differences lie in the electrical properties and protocol layers:
If you are designing a circuit board or performing chip-off data recovery/repair on a UFS 3.1 chip, observe the following rules: