PCI Express (PCIe) PHY is used for alternate protocols with memory and coherency semantics such as Compute Express link and Ultra-Path Interconnect due to its low latency and power efficiency.… Click to show full abstract
PCI Express (PCIe) PHY is used for alternate protocols with memory and coherency semantics such as Compute Express link and Ultra-Path Interconnect due to its low latency and power efficiency. In this article, we propose mechanisms to use PCIe 6.0 PHY at 64.0 GT/s with PAM-4 signaling for coherency and memory protocols in platforms deploying heterogeneous processing elements and memory subsystems with 0 latency impact, high-bandwidth efficiency, and high reliability. We also propose a new L0p mechanism for power savings with low latency.
               
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