In the chiplet marketplace, the vision of a library of chiplets that can be mixed and matched requires interoperability between chiplets (sometimes from different sources), meaning standardization is essential. By establishing common chiplet system standards, designers will be able to seamlessly integrate chiplets from different vendors, reducing development time and costs while continuing to drive innovation. Interoperability ensures that diverse components work together reliably, unlocking new possibilities for modular system design and expanding the market for all participants.
While there are several specifications that aim to define chiplet systems, the Arm® Chiplet System Architecture (Arm CSA) is by far the most comprehensive and mature. Arm recently contributed the Arm CSA to the Open Compute Project (OCP) to form the Foundational Chiplet System Architecture (FCSA). FCSA will deliver a vendor and CPU-neutral architecture, common system partition guidelines, and a shared vocabulary and set of standards for system-level and interface definitions between chiplets, complementing existing interconnect standards like the Universal Chiplet Interconnect Express (UCIe™).