PCI Express Base Specification Archive

Below are archived copies of the PCI Express Specifications and ECNs, including both the official specification as well as "change bar" versions for ease of comparison. Included is the PCI Express 1.x Electromechanical and Protocol & Software ECNs. Also included is the PCI Express 1.0a errata document, which contains all identified errata since the publication of the PCI Express 1.0a specification. Additionally, please find below the PCI Express Mini Card Electromechanical 1.1 specification.

PCI Express 1.x Electromechanical ENCs

• UICC Inter-Chip USB Interface ECN (79k PDF)
• Display-Mini Card (DMC) Definition ECN (666k PDF)
• Mini-Card PCIe 2.0 Update ECN (188k PDF)
• Input Power and Voltage Tolerance ECN (189k PDF)
• Mini-WFF Alignment Changes ECN (267k PDF)
• Slot Short Wiring ECN (112k PDF)
• Thermal ECN (300k PDF)
• Host Socket Recommendations ECN (4.31MB PDF
• Half Mini CEM ECN (2.23MB PDF)

PCI Express 1.x Protocol & Software ECNs

• Alternative Routing-ID Interpretation ECN (249k PDF) 
• Link Bandwidth Notification ECN (74k PDF)
• Access Control Services ECN (170k PDF)
• Completion Timeout Control Capability ECN (210k PDF)
• PCI Express Capability Structure Expansion ECN (38k PDF)
• Trusted Configuration Space for PCI Express ECN (782k PDF)
• Function Level Reset (FLR) ECN (162k PDF)
• Power Limit Re-definition ECN (85k PDF)

PCI Express Base Specification 1.0a

• PCI Express Base Specification 1.0a (3.3MB PDF)
• PCI Express Base Specification 1.0a - Change Bar (2.5MB PDF)
• Errata for the PCI Express Base Specification - Revision 1.0a (1.1MB PDF) 

PCI Express Card Electromechanical Specification 1.0a

• PCI Express Card Electromechanical Specification 1.0a (1MB PDF)
• PCI Express Card Electromechanical Specification 1.0a - Change Bar (1.1MB PDF)

PCI Express Mini Card Electromechanical Specification 1.1

• PCI Express Mini Card Electromechanical Specification 1.1 (562k PDF)
• PCI Express Mini Card Electromechanical Specification 1.1 - Change Bar (526k PDF)

PCI Express Electrical ECNs

• Download Return Loss (144k PDF)

PCI Express Electromechanical ECNs

• Download 75w Power ECN (222k PDF)
• Download Card Retention ECN (213k PDF)
• Download PERST# ECN (19k PDF)
• Download Color Connector ECN (112k PDF)
• Download miniCEM-Vaux-typo (100k PDF)
• Download miniCEM-CLKREQ# (229k PDF)
• Download Wireless Disable (148k PDF)
• Download MiniCEM_SIM_UIM (288k PDF)
• Download Low Profile Power ECN (20k PDF)

PCI Express Protocol & Software ECNs

• Download Error Reporting ECN (279k PDF)
• Download RC Topology Discovery ECN (223k PDF)
• Download Integrated Devices - Event Collector ECN (31k PDF)
• Download Error Clarifications ECN (38k PDF)
• Download Reset Limit Adjustment ECN (10k PDF)
• Download MFVC ECN ( 311k PDF)
• Download Training Error ECN (282k PDF)
• Download MMCONFIG ECN (229k PDF)
• Download MSI-X ECN for PCI Express (198k PDF)
• Download Bridge Updates (190k PDF)
• Download Request Dependancies (136k PDF)
• Download Platform Ref Clock PM Capability ECN (40k PDF)
• Download CRS Software Visiability ECN (232k PDF)
• Download VSEC ECN (145k PDF)
• Download PME Turnoff (180k PDF)
• Download PR Acceptance Limit (136k PDF)
• Download FC Init ECN (203k PDF)
• Download Suprise Down ECN (244k PDF)
• Download PCI Express Hot Plug ECN (443k PDF)
• Download PCI Express Base PCI Bus Power Management ECN (71kPDF)