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PCI Express® Review Zone

PCI Express Specifications and ECNs for Review

PCI-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.

This page contains Specifications and ECNs that are currently undergoing member review. Please check here regularly for new material available.

Specifications and ECNs that have completed their review cycle are available in the PCI Express Review Archive.

SFF-8639 Connector Spec Revision 0.7

THIS 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 specification is focused on PCI Express® (PCIe) solutions utilizing the SFF-8639 connector interface.

The review period for the SFF-8639 Connector Spec Revision 0.7 will end at 5 p.m. (PT) on Monday, May 16, 2014. Any feedback should be sent to administration@pcisig.com.

SRIS JTOL and SSC Profile Requirements ECN

THIS 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.

Modifies specifications to provide revised JTOL curve for SRIS mode and provides additional frequency domain constraint of SSC profile jitter on reference clocks.

The review period for the SRIS JTOL and SSC Profile Requirements ECN will end at 5 p.m. (PT) on Monday, June 16, 2014. Any feedback should be sent to administration@pcisig.com.

NOP DLLP ECN

THIS 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 ECN accomplishes two housekeeping tasks associated with DLLP encoding.No functional changes are involved to any hardware or software. Optional (and simple) changes may be reasonable in the Link / Transaction Test Specification.

The review period for the NOP DLLP ECN will end at 5 p.m. (PT) on Monday, June 16, 2014. Any feedback should be sent to administration@pcisig.com.

PLL Bandwidth Test Limits ECN

THIS 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.

Modifies the limits used by the PLL bandwidth test to allow guardband for a single PLL test solution to be used at PCI-SIG compliance workshops without impacting pass/fail results for member companies.

The review period for the PLL Bandwidth Test Limits ECN will end at 5 p.m. (PT) on Monday, June 16, 2014. Any feedback should be sent to administration@pcisig.com.

Extension Devices ECN

THIS 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 ECN provides the specification for Physical Layer protocol aware Retimers for PCI Express 3.0/3.1. 

The review period for the Extension Devices ECN will end at 5 p.m. (PT) on Monday, May 26, 2014. Any feedback should be sent to administration@pcisig.com.

PCI Express Hot Plug ECN

THIS 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.

Changes include clarifications to support PCIe surprise hot plug to allow certain errors to be suppressed by platform if software stack ensured error containment. Also this ECN removes the implementation note in section 4.5.2.4 which is not representative of OS behavior.

The review period for the PCI Express Hot Plug ECN will end at 5 p.m. (PT) on Monday, May 12, 2014. Any feedback should be sent to administration@pcisig.com.