A JEDEC standard for CXL memory modules

A JEDEC standard for CXL memory modules

Technology News |
By Nick Flaherty

The JEDEC Solid State Technology Association has published a standard for modules using the Compute Express Link (CXL) distributed memory specification.

The JESD317 CXL Memory Module Base Standard, known as CMM, defines the specifications of interface parameters, signalling protocols, environmental requirements, packaging, and other features as reference for specific target implementations of CXL-attached memory modules.

CMM is designed to provide reference base targets for CXLTM-attached memory modules to help simplify system design and minimize industry confusion for first adoption. It uses established industry standard specifications from SNIA (EDSFF), PCIe, and CXL to define specific module implementations so that system providers can accommodate certain known devices while leaving room for innovation.

The standard also supports system device slots designed to be compatible with both CMMs and traditional PCIe-attached NVMe drives.

“The high-speed memory capabilities offered by CXL memory modules are increasingly important to the industry and critical to many emerging applications such as artificial intelligence and data analytics,” said Mian Quddus, JEDEC Board of Directors Chairman. “JEDEC’s goal with the development of JESD317 CMM is to offer suppliers of CXLTM -attached memory industry-aligned targets to support broader adoption.”

“JEDEC’s new CMM standard establishes a first common starting point for CXLTM memory expansion and lowers the barrier of technology adoption for both suppliers and system manufacturers,” said Jonathan Hinkle, Chair of JEDEC’s CXL Memory Task Group and systems architect at memory maker Micron Technology.

“In a dedicated effort underscoring the importance of this standard for the industry, key companies joined forces in the TG to align and drive this first standard, including major hyperscale and enterprise system designers, memory suppliers, and processor vendors.”

The standard is available for free download from the JEDEC website.


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