Gen-Z PHY Specification 1.1 Published

Stefan Mileschin · 7th October 2019, 08:00

The Gen-Z Consortium this week released Physical Layer Specification 1.1 for Gen-Z interconnects. The new standard adds enhanced support for PCIe Gen 5 as well as Gen-Z 50G Fabric and Local PHY. The publication of the new PHY revision enables chip developers to implement support for the technologies in upcoming devices featuring Gen-Z interconnects.

Designed to offer high bandwidth and low latency for connections between processors, co-processors/accelerators, and memory/fast storage, Gen-Z 1.0 uses a PCIe physical layer and a modified IEEE 802.3 Ethernet electrical layer standards to provide per-lane speeds of up to the 56 GigaTransfers/second. The Gen-Z 1.0 physical layer specification only defined usage of PCIe Gen 1-4 protocols as well as a 25 GT/s PHY. Thus, to take advantage of all the capabilities of the Gen-Z 1.0 core specification, one needs to comply with the Gen-Z PHY that describes logical, functional, electrical, and channel characteristics for various PHY layers.

https://www.anandtech.com/show/14946...enz-50g-fabric

7th October 2019, 08:00	#1
Stefan Mileschin [M] Reviewer Join Date: May 2010 Location: Romania Posts: 148,650	Gen-Z PHY Specification 1.1 Published The Gen-Z Consortium this week released Physical Layer Specification 1.1 for Gen-Z interconnects. The new standard adds enhanced support for PCIe Gen 5 as well as Gen-Z 50G Fabric and Local PHY. The publication of the new PHY revision enables chip developers to implement support for the technologies in upcoming devices featuring Gen-Z interconnects. Designed to offer high bandwidth and low latency for connections between processors, co-processors/accelerators, and memory/fast storage, Gen-Z 1.0 uses a PCIe physical layer and a modified IEEE 802.3 Ethernet electrical layer standards to provide per-lane speeds of up to the 56 GigaTransfers/second. The Gen-Z 1.0 physical layer specification only defined usage of PCIe Gen 1-4 protocols as well as a 25 GT/s PHY. Thus, to take advantage of all the capabilities of the Gen-Z 1.0 core specification, one needs to comply with the Gen-Z PHY that describes logical, functional, electrical, and channel characteristics for various PHY layers. https://www.anandtech.com/show/14946...enz-50g-fabric

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