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CXL to UCIe Bridge IP
Design IP
Overview

SmartDV’s CXL to UCIe Bridge IP enables seamless interoperability between Compute Express Link (CXL) and Universal Chiplet Interconnect Express (UCIe), making it an essential component for next-generation chiplet-based systems. This bridge facilitates high-bandwidth, low-latency communication across heterogeneous dies, aligning with the industry’s shift toward disaggregated architectures.

Designed for flexibility, the IP core is highly configurable to meet specific design requirements, supporting both ASIC and FPGA implementations while optimizing for area, power, and performance. It supports key CXL protocols, including CXL.io, CXL.cache, and CXL.mem, and aligns with UCIe standards for die-to-die communication, helping designers accelerate multi-die integration with confidence.

Benefits
  • Unified Chiplet Connectivity – Bridges Compute Express Link (CXL) interfaces with UCIe-based chiplets, enabling interoperability across disaggregated compute and memory elements
  • Comprehensive CXL Support – Supports CXL.io, CXL.cache, and CXL.mem protocols, allowing integration of host processors with accelerators, memory expanders, and chiplet-based resources
  • Multi-Version Compatibility – Compliant with CXL 2.0 and 3.0 specifications and UCIe 1.0/1.1/2.0 for maximum flexibility in chiplet ecosystems
  • High-Speed, Low-Latency Communication – Supports link speeds up to 32 GT/s with scalable UCIe clock frequencies (up to 4 GHz) and lane widths (16, 32, and 64 lanes) for bandwidth-intensive applications
  • Protocol-Aware Bridging – Ensures ordering, coherency, and flow control across the CXL and UCIe domains with translation between TLP and flit formats including streaming, raw, and latency-optimized 256B
  • Advanced Memory Handling – Enables support for memory pooling, shared memory regions, device-level memory management, and fabric-attached memory models as per CXL.mem architecture
  • Flexible System Integration – Supports Root Complex and Endpoint modes, standard and advanced UCIe packages, sideband messaging, mailbox communication, clock gating, and retry mechanisms
  • Scalable and Configurable Design – Parameterized bridge core allows programmable flow control, address-based response handling, and protocol-level delay and retry customization
Compliance and Compatibility
  • Fully compliant with CXL 2.0 and 3.0 specifications, supporting CXL.io, CXL.cache, and CXL.mem
  • Conforms to UCIe 1.0, 1.1, and 2.0 specifications, including all required flit formats and sideband protocols
  • Compatible with Standard and Advanced UCIe packages, in both Root Complex and Endpoint modes
  • Compatible with all major EDA synthesis, simulation, and linting flows