PCI-SIG specifications define standards driving the industry-wide compatibility of peripheral component interconnects. Members regularly review them, providing commentary and change requests when necessary. These requests are considered by technical workgroups and applied as appropriate, resulting in collaboratively devised specifications benefiting millions of platforms and add-in devices.
Engineering Change Request Process
PCI-SIG members may submit requests to change specifications here. The Engineering Change Request process and form can be found here.
Purchasing Specifications
PCI-SIG members may access specifications online, at no cost, using the Specification Library. Members may filter their search by technology type, revision, and the type of document. Select the appropriate filters and then select the Filter button to initiate your search. Alternatively, members may purchase a hard copy of the specifications, at a reduced member rate, here.
Non-members who are interested in purchasing specifications may submit their order here.
PCI Code & ID Assignment Specifications
The PCI Code & ID Assignment Specifications are accessible to non-members without charge here. PCI-SIG members can download these specifications directly from the Specifications Library below.
The M.2 form factor is intended for Mobile Adapters....view moreThe M.2 form factor is intended for Mobile Adapters. The M.2 is a natural transition from the Mini Card and Half-Mini Card (refer to the PCI Express Mini CEM Specification) to a smaller form factor in
both size and volume. The M.2 is a family of form factors that enables expansion, contraction, and higher integration of functions onto a single form factor module solution.
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The M.2 form factor is intended for Mobile Adapters....view moreThe M.2 form factor is intended for Mobile Adapters. The M.2 is a natural transition from the Mini Card and Half-Mini Card (refer to the PCI Express Mini CEM Specification) to a smaller form factor in both size and volume. The M.2 is a family of form factors that enables expansion, contraction, and higher integration of functions onto a single form factor module solution.
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The M.2 form factor is intended for Mobile Adapters....view moreThe M.2 form factor is intended for Mobile Adapters. The M.2 is a natural transition from the Mini Card and Half-Mini Card (refer to the PCI Express Mini CEM Specification) to a smaller form factor in both size and volume. The M.2 is a family of form factors that enables expansion, contraction, and higher integration of functions onto a single form factor module solution.
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The M.2 form factor is intended for Mobile Adapters....view moreThe M.2 form factor is intended for Mobile Adapters. The M.2 is a natural transition from the Mini Card and Half-Mini Card (refer to the PCI Express Mini CEM Specification) to a smaller form factor in both size and volume. The M.2 is a family of form factors that enables expansion, contraction, and higher integration of functions onto a single form factor module solution.
show less
The M.2 form factor is intended for Mobile Adapters....view moreThe M.2 form factor is intended for Mobile Adapters. The M.2 is a natural transition from the Mini Card and Half-Mini Card (refer to the PCI Express Mini CEM Specification) to a smaller form factor in both size and volume. The M.2 is a family of form factors that enables expansion, contraction, and higher integration of functions onto a single form factor module solution.
show less
The M.2 form factor is intended for Mobile Adapters....view moreThe M.2 form factor is intended for Mobile Adapters. The M.2 is a natural transition from the Mini Card and Half-Mini Card (refer to the PCI Express Mini CEM Specification) to a smaller form factor in both size and volume. The M.2 is a family of form factors that enables expansion, contraction, and higher integration of functions onto a single form factor module solution.
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Smaller lithography has led to smaller pad sizes whi...view moreSmaller lithography has led to smaller pad sizes which has increased parasitics on inputs. For the Card Electromechanical Specification, this ECR increases Cin, the maximum input pin capacitance on 3.3 V logic signals (applies to PERST# and PWRBRK#) from 7 pF to 20 pF (see CEM Table 3).
For the M.2 specification, this ECR increases M.2 CIN, the maximum input pin capacitance for both 3.3 V logic signal (applies to PERST#, see M.2 Table 4-1) and 1.8 V logic signals (applies to PERST# and PEWAKE# (when used for OBFF signaling), see M.2 Table 4-2) from 10 pF to 20 pF. This capacitance increase is large enough for known upcoming lithographies.
It had not been clear what the measurement point was for CIN in CEM or M.2 specifications. This 18 ECN extends the COUT measurement point specified in M.2 to apply to CIN and COUT for both 19 CEM and M.2 specifications.
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The M.2 form factor is intended for Mobile Adapters....view moreThe M.2 form factor is intended for Mobile Adapters. The M.2 is a natural transition from the Mini Card and Half-Mini Card (refer to the PCI Express Mini CEM Specification) to a smaller form factor in both size and volume. The M.2 is a family of form factors that enables expansion, contraction, and higher integration of functions onto a single form factor module solution.
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This ECN introduces multiple features for M.2 and af...view moreThis ECN introduces multiple features for M.2 and affects the PCIe M.2 Specification Revision 1.1 and the PCIe BGA SSD 11.5x13 ECN.
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Final Release against Base Revision 3.1a.Subsequent ...view moreFinal Release against Base Revision 3.1a.Subsequent Errata will be against Base Revision 4.0
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M.2 Key B (WWAN) is modified to enable PCIe and USB ...view moreM.2 Key B (WWAN) is modified to enable PCIe and USB 3.1 Gen1 signals to be simultaneously present on the connector. This enables support for a single SKU M.2 card that supports both PCIe and USB 3.1 Gen1. There are two implementation options enabled:
1. State #14 in the “Socket 2 Add-in Card Configuration Table” is re-defined to indicate an Add-in Card built to the PCI Express M.2 Specification, Revision 1.1 or later where both PCIe and USB 3.1 Gen1 are both present on the connector. The choice of Port Configuration is vendor defined. This enables the host to unambiguously determine that PCIe and USB 3.1 Gen1 are present on the connector.
2. States #4, 5, 6, 7 in the “Socket 2 Add-in Card Configuration Table” are re-defined to indicate that in addition to USB 3.1 Gen1, PCIe may be present on the connector. This definition was used by M.2 cards built to the PCI Express M.2 Specification, Revision 1.0 (USB 3.1 Gen1 on connector; PCIe is “no connect”). This definition is now also permitted to be used by M.2 cards built to PCI Express M.2 Specification, Revision 1.1 or later to indicate that PCIe and USB 3.1 Gen1 are both present on the connector. This allows GPIO port configurations to remain consistent with all other existing states.
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This proposal adds a new 11.5 mm x 13 mm PCIe BGA SS...view moreThis proposal adds a new 11.5 mm x 13 mm PCIe BGA SSD form factor to the M.2 v1.1 specification.
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The M.2 form factor is intended for Mobile Adapters....view moreThe M.2 form factor is intended for Mobile Adapters. The M.2 is a natural transition from the Mini 3 Card and Half-Mini Card (refer to the PCI Express Mini CEM Specification) to a smaller form factor in 4 both size and volume. The M.2 is a family of form factors that enables expansion, contraction, and 5 higher integration of functions onto a single form factor module solution.
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The M.2 form factor is intended for Mobile Adapters....view moreThe M.2 form factor is intended for Mobile Adapters. The M.2 is a natural transition from the Mini 3 Card and Half-Mini Card (refer to the PCI Express Mini CEM Specification) to a smaller form factor in 4 both size and volume. The M.2 is a family of form factors that enables expansion, contraction, and 5 higher integration of functions onto a single form factor module solution.
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Definition of electrical eye limits (Eye Height and ...view moreDefinition of electrical eye limits (Eye Height and Eye Width) at the M.2 connector for SSIC host and device transmitter is proposed to be added in the specification.
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The M.2 form factor is used for Mobile Add-In cards....view moreThe M.2 form factor is used for Mobile Add-In cards. The M.2 is a natural transition from the Mini Card and Half-Mini Card to a smaller form factor in both size and volume. The M.2 is a family of form factors that will enable expansion, contraction, and higher integration of functions onto a single form factor module solution.
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