Cross over M.2, here comes the XFM memory specification


Why it issues: The JEDEC Stable Say Abilities Association has presented a brand new Crossover Flash Memory (XFM) specification for NAND storage, designed to interchange the gift M.2 form ingredient. Its greatly smaller form ingredient could perchance perchance wait on to raise replaceable storage into smaller devices which devour historically simplest been capable of match soldered memory, nonetheless size is now not all that issues on that front.

The JEDEC JESD233 XFM Embedded and Removable Memory Tool (XFMD) commonplace makes use of the NVMe logical interface over a PCI Specific physical interface, which formula that XFMD playing cards will appear to their host devices sincere as an M.2 stick would. Despite the indisputable truth that the commonplace makes use of simplest one or two lanes of the interface, the bandwidth of PCIe Gen 4 restful provides it some distance increased info switch speeds than UFS chips (love those pictured above), soldered eMMC storage, and removable SD storage.

The closing is an extraordinarily necessary point of comparison, equipped that the XFMD described within the JEDEC specification measured sincere 18 x 14 x 1.4mm (15 x 11 x 2.1mm) is closely linked in size to a microSD card.

JEDEC says that the smaller commonplace would allow use in eventualities that will perchance perchance perchance most frequently be restricted to soldered storage, reminiscent of IoT and embedded applications — though furthermore notes that other highly portable devices would devour the advantage of the new form ingredient, reminiscent of VR headsets, drones, and ultraportable laptops.

Memory manufacturer Kioxia has spoken out in desire of the new form ingredient, with senior director Atasushi Inoue claiming that the XFMD commonplace “shall be dilapidated as a sport changer for semi-removable storage in many electronic and IOT devices, taking profit of its balanced performance, puny size, and simple maintenance.”

MediaTek furthermore counseled XFM, though it described the specification as enabling “new, expandable storage alternatives for quit users,” in distinction to Kioxia’s study of semi-removable storage.

Nonetheless, while the specified XFMD is sufficiently puny to doubtlessly exchange some soldered alternatives, PCIe attracts more vitality than the M-PHY interface currently dilapidated in UFS alternatives, which can perchance perchance perchance damage adoption in particularly ultraportable battery-powered applications.

As well, the tips sheet makes no mention of DRAM caches which can perchance perchance perchance be key enablers of the performance of present excessive-performance SSDs, and if those are absent then XFMDs could perchance perchance salvage it now not easy to release the fat tempo advantages of NVMe over their UFS or eMMC counterparts.