UCIe，万事俱备

Core Viewpoint - The article discusses the advancements in UCIe 3.0, particularly its increased data rates and improved management features, which are crucial for meeting the growing demands of artificial intelligence workloads in data centers [2][3]. Group 1: UCIe 3.0 Features - UCIe 3.0 doubles the maximum allowed data rate for UCIe-S and UCIe-A from 32 GT/s to 64 GT/s, with 48 GT/s also mentioned [5]. - The new version introduces better management capabilities, allowing for more efficient firmware distribution across multiple Chiplets [10]. - UCIe 3.0 enhances streaming transmission and recalibration functions, addressing previously unresolved issues [15][20]. Group 2: Technical Improvements - The use of quarter-rate signaling enables higher data rates of 48 GT/s and 64 GT/s, significantly reducing risks for users and vendors in creating new intellectual property [6][7]. - The error rates for 48 GT/s and 64 GT/s are acceptable at 10¹⁵ and 10¹² respectively, especially when considering CRC checks and replay mechanisms [6]. - Power consumption remains below 0.5 pJ/bit at lower data rates, with higher rates targeting 0.75 pJ/bit [7]. Group 3: System Design and Integration Challenges - The increasing complexity of heterogeneous integration poses new challenges, including rising power and thermal demands, as well as system-level verification across stacked architectures [9]. - As UCIe moves to 64 Gbps, design margins shrink, increasing wiring density and signal integrity risks [9]. Group 4: Compatibility and Adoption - UCIe 3.0 maintains compatibility with previous versions, allowing for new bandwidth without changing bump locations [8][21]. - The industry is shifting towards UCIe standards, with many previously using custom solutions now considering UCIe due to its advancements [21].