PCI Express Specifications and ECNs for ReviewPCI-SIG® Member benefits include the ability to influence the direction of PCI I/O Technology, review draft specifications, and participate in the ECR/ECN process. Please check this page regularly for new material available for member review. Low Swing with De-emphasis Option Enabling Draft ECNTHIS IS A DRAFT SPECIFICATION ONLY AND, AS SUCH, IS SUBJECT TO FURTHER REVISION AND REVIEW WITHOUT NOTICE. THIS DRAFT SPECIFICATION IS PROVIDED TO YOU FOR REVIEW PURPOSES ONLY AND SHOULD NOT BE RELIED UPON FOR DESIGN OR MANUFACTURING PURPOSES. This draft ECN updates the PCI Express 2.0 Base Specification to clarify spec language to explicitly allow de-emphasis as an optional implementation during Tx low swing (also know as low power or half swing) mode use when operating at 5GT/s. The update solely reflects an optional mode of implementation for the Tx and constitutes no change for the Rx. Therefore, there are no required functional changes demanded by the clarification to the specification. There are no impacts to backwards compatibility.
The 30-day review of this draft ECN will end on Thursday, September 18, 2008. Please direct all comments to PCI-SIG Administration.
TLP Processing Hints Draft ECNTHIS IS A DRAFT SPECIFICATION ONLY AND, AS SUCH, IS SUBJECT TO FURTHER REVISION AND REVIEW WITHOUT NOTICE. THIS DRAFT SPECIFICATION IS PROVIDED TO YOU FOR REVIEW PURPOSES ONLY AND SHOULD NOT BE RELIED UPON FOR DESIGN OR MANUFACTURING PURPOSES. This optional normative ECN defines a mechanism by which a Requester can provide hints on a per transaction basis to facilitate optimized processing of transactions that target Memory Space. The architected mechanisms may be used to enable association of system processing resources (e.g. caches) with the processing of Requests from specific Functions or enable optimized system specific (e.g. system interconnect and Memory) processing of Requests. The 30-day review of this draft ECN will end on Friday, August 29, 2008. Please direct all comments to PCI-SIG Administration.
Go to the PCI Express Review Archive to see specifications and ECNs that have completed their review cycle. |
