PCI Express Label Specification and Usage Guidelines Revision 1.0

Transcription

1 PCI Express Label Specification and Usage Guidelines Revision 1.0 June 1, 2006

2 REVISION REVISION HISTORY DATE 1.0 Initial release 06/1/2006 PCI-SIG disclaims all warranties and liability for the use of this document and the information contained herein and assumes no responsibility for any errors that may appear in this document, nor does PCI-SIG make a commitment to update the information contained herein. Contact the PCI-SIG office to obtain the latest revision of the specification. Questions regarding this document or membership in PCI-SIG may be forwarded to: Membership Services administration@pcisig.com Phone: Fax: Technical Support techsupp@pcisig.com DISCLAIMER This document is provided as is with no warranties whatsoever, including any warranty of merchantability, non-infringement, fitness for any particular purpose, or any warranty otherwise arising out of any proposal, specification, or sample. PCI-SIG disclaims all liability for infringement of proprietary rights, relating to use of information in this specification. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted herein. PCI, PCI Express, PCIe, and PCI-SIG are trademarks or registered trademarks of PCI-SIG. All other product names are trademarks, registered trademarks, or servicemarks of their respective owners. Copyright 2006 PCI-SIG All rights reserved. 2

3 Contents 1. LABEL SPECIFICATION PLATFORM LABELING ADAPTER ATTRIBUTE LABELING SLOT ATTRIBUTE LABELING ENCLOSURE ATTRIBUTE LABELING RECONCILING ADAPTER AND SLOT ATTRIBUTES ADDITIONAL PCI EXPRESS LOGO REQUIREMENTS Figures FIGURE 1: EXAMPLE ADAPTER LABEL FIGURE 2: EXAMPLE PLATFORM SLOT LABEL FIGURE 3: EXAMPLE ENCLOSURE LABEL Tables TABLE 1: EXAMPLE ADAPTER ATTRIBUTE LABELS... 9 TABLE 2: EXAMPLE PLATFORM SLOT ATTRIBUTE LABELS TABLE 3: RECONCILED MAXIMUM SIGNALING LEVEL EXAMPLES TABLE 4: RECONCILED MAXIMUM LINK WIDTH EXAMPLES TABLE 5: RECONCILED MAXIMUM NEGOTIATED LINK WIDTH EXAMPLES TABLE 6: RECONCILED OPERATIONAL POWER EXAMPLES TABLE 7: RECONCILED LABEL EXAMPLES

4 4 PCI EXPRESS LABEL SPECIFICATION AND USAGE GUIDELINES, REV. 1.0

5 Objective of the Specification The purpose of this document is to clarify and standardize how PCI-SIG members communicate support for PCI Express (PCIe ). Communications mechanisms include sales collateral, system documentation, motherboard silk-screens next to PCIe slots, enclosure labels, and labels on PCIe Adapters. With the use of labeling, the user is better able to align PCIe Adapter performance with the system slot performance. This document is to be used in conjunction with, and does not supersede, the terms and conditions specified in the PCI-SIG Trademark and Logo Usage Guidelines document. Adherence to this specification is optional. Document Organization Chapter 1 specifies platform, Adapter, and enclosure labeling requirements and provides examples to illustrate usage. Chapter 2 specifies additional PCI Express logo requirements. Documentation Conventions Capitalization Some terms are capitalized to distinguish their definition in the context of this document from their common English meaning. Words not capitalized have their common English meaning. When terms such as memory write or memory read appear completely in lower case, they include all transactions of that type. Register names and the names of fields and bits in registers and headers are presented with the first letter capitalized and the remainder in lower case. Numbers and Number Bases Hexadecimal numbers are written with a lower case h suffix, e.g., 0FFFFh and 80h. Hexadecimal numbers larger than four digits are represented with a space dividing each group of four digits, as in 1E FFFF FFFFh. Binary numbers are written with a lower case b suffix, e.g., 1001b and 10b. Binary numbers larger than four digits are written with a space dividing each group of four digits, as in b. All other numbers are decimal. Reference Information Reference information is provided in various places to assist the reader and does not represent a requirement of this document. Such references are indicated by the abbreviation (ref). For example, in some places, a clock that is specified to have a minimum period of 400 ps also includes the reference information maximum clock frequency of 2.5 GHz (ref). Requirements of other specifications also appear in various places throughout this document and are marked as reference information. Every effort has been made to guarantee that this information accurately reflects the referenced document; however, in case of a discrepancy, the original document takes precedence. 5

6 Implementation Notes Implementation Notes should not be considered to be part of this specification. They are included for clarification and illustration only. Implementation Notes within this document are enclosed in a box and set apart from other text. Terms and Abbreviations Adapter Enclosure Signaling Link width PCIe Adapter refers to any of the supported PCIe form factors: PCIe Card Electromechanical (CEM), PCIe Mini Card, and PCIe ExpressModule. To simplify and improve clarity, this term is used throughout the document. Also known as a chassis, an enclosure is a mechanical structure capable of housing one or more Adapters. Indicates the effective bit rate of the Link: 2.5 GT/s or 5.0 GT/s. The collection of two Ports and their interconnecting Lanes. A Link is a dual-simplex communications path between two components. PCIe currently supports multiple Link widths: x1, x2, x4, x8, x12, x16, and x32. xn indicates the physical and/or active number of Lanes in each direction on a given Link. The PCI-SIG has trademarked PCIe as an acceptable abbreviation for PCI Express as reflected in the latest PCI-SIG Trademark and Logo Usage Guidelines document. 6

7 1 1. Label Specification This specification specifies labels for PCIe Adapters, slots, and enclosures and is optional normative. This specification is applicable to all PCIe form factors. PCIe form factor specifications take precedence over this label specification if they specify a label. For example, the PCIe ExpressModule specification specifies label construction and should be adhered to where there is specification overlap with this label specification Platform Labeling A platform that includes one or more PCIe slots must indicate the form factor(s) supported. Similarly an Adapter must indicate its form factor type and size. This information should be included in documentation, applicable sales/marketing collateral, and specification sheets Adapter Attribute Labeling The following attributes are used to construct an Adapter label. Each attribute supports multiple options and, therefore, each option must be comprehended with the associated label. Signaling The maximum supported signaling rate supported by the Adapter The label PCIe indicates the maximum signaling rate supported by the Adapter is 2.5 GT/s per Lane. The label PCIe2 indicates the maximum signaling rate supported by the Adapter is 5.0 GT/s per Lane. An Adapter supporting 5.0 GT/s signaling is required to support PCIe 2.5 GT/s signaling to insure interoperability; therefore, the label PCIe2 indicates the Adapter is permitted to be inserted into any slot that supports either signaling rate but will only perform at the maximum signaling of the slot; e.g., if 2.5 GT/s signaling is maximum, then the Adapter will perform at the 2.5 GT/s signaling rate. 7

8 Link width The maximum physical Link width of the edge connector of the Adapter Depending upon the Adapter form factor, the connector can be one of the following Link widths: x1, x4, x8, or x16. See the corresponding Adapter form factor specification for additional details on the maximum physical Link width supported by a given form factor. In general, an Adapter with a smaller maximum physical Link width can be inserted into a larger maximum physical Link width slot; e.g., a x4 Adapter can be inserted into a x8 slot. Note: While PCIe supports a x32 Link width, there are currently no PCIe form factors that support this Link width. Negotiable Link width An Adapter may be capable of negotiating intermediate Link widths between x1 and xn (where N is the maximum number of Lanes routed). If intermediate Link widths are supported, then all supported Link widths are included within a pair of parenthesis as part of the label. An Adapter is permitted to support any of the following negotiated Link widths: x1, x2, x4, x8, x12, x16. Power requirement Communicates the maximum power the Adapter requires a corresponding slot to deliver. Unless otherwise constrained by the form factor, the default power is 25 W. Therefore, if the default 25 W is required by the Adapter, the power attribute component is not included in the label. For the x1 CEM form factor, an Adapter may only require 10 W from the slot. If so, the label includes a 10W power attribute component. For the x16 CEM form factor, an Adapter may require 75 W be delivered by the slot. If so, the label includes a 75W power attribute component. For x16 CEM Adapters designed to the PCI Express x16 Graphics 150W-ATX Specification, an Adapter requires an additional connector and associated power. If so, the label includes a +EXT75W power attribute component. These attributes are concatenated together to construct an Adapter label as follows: PCIeG xl (X n, X n-1, X 0 ) pw Where: G = Not present (supports 2.5 GT/s only) or signaling generation (e.g., 2 indicates the adapter supports 5.0 GT/s and 2.5 GT/s signaling) L = Physical size of the edge connector X = Negotiated Link width. If no negotiated Link widths values are provided, the Adapter supports all intermediate Link widths up to the maximum size of the edge connector. pw = Not present if default maximum or power in Watts 8

9 In addition to the above attributes, the label must comply with the following: An Adapter label is permitted to be either silkscreen or an adhesive label. An Adapter label must be clearly legible. The recommended minimum height for an adhesive label or the silkscreen on an Adapter is 2.5 mm. This minimum height guideline applies to all PCIe form factors. The label can be applied to any location on either the component side or the backside of the Adapter. It is recommended that the label be placed near the top edge of the Adapter to allow visibility of the label when the Adapter is seated in a PCIe slot. The label should be used in all marketing collateral and specification sheets as well as user documentation for consistency. Table 1 illustrates a number of examples of how the Adapter attribute components are combined to create the associated compliant label. Example Label PCIe x1 10W Table 1: Example Adapter Attribute Labels Explanation Adapter with x1 edge connector capable of operating in x1 Link width, uses 2.5 GT/s signaling, and requires 10 W to be delivered by the PCIe slot PCIe x16 75W Adapter with x16 edge connector capable of operating in x16, x12, x8, x4, x2, or x1 negotiable Link width, uses 2.5 GT/s signaling, and requires 75 W to be delivered by the PCIe slot PCIe x8 Adapter with x8 edge connector capable of operating in x8, x4, x2,or x1 negotiable Link width, uses 2.5 GT/s signaling, and requires 25 W to be delivered by the PCIe slot PCIe x16 (16,8,4,1) 75W Adapter with x16 edge connector capable of operating in x16, x8, x4, or x1 negotiable Link width, uses 2.5 GT/s signaling, and requires 75 W to be delivered by the PCIe slot PCIe x16 (16,8,4,1) 75W +EXT 75W PCIe2 x4 Adapter with x16 edge connector capable of operating in x16, x8, x4, or x1 negotiable Link width, uses 2.5 GT/s signaling, and requires 75 W to be delivered by the PCIe slot. Adapter also requires an additional 75 W from the PCIe x16 Graphics 150 W- ATX power connector. Adapter may not operate at full performance or only in diagnostics mode if the additional graphics power connector is not present. Adapter with x4 edge connector capable of operating in x4,x2, or x1 negotiable Link width, supports 2.5 GT/s and 5.0 GT/s signaling, and requires 25 W to be delivered by the PCIe slot 9

10 Figure 1: Example Adapter Label 1.3. Slot Attribute Labeling The following attributes are used to construct a slot label. Each attribute supports multiple options and, therefore, each option must be comprehended with the associated label. Signaling The maximum supported signaling rate supported by the slot. The label PCIe indicates the maximum signaling rate supported by component attached to the slot is 2.5 GT/s per Lane. The label PCIe2 indicates the maximum signaling rate supported by the component attached to the slot is 5.0 GT/s per Lane. A slot supporting 5.0 GT/s signaling is required to support PCIe 2.5 GT/s signaling to insure interoperability; therefore, the label PCIe2 indicates an Adapter supporting either signaling rate can be inserted into the slot and operate at the Adapter s maximum signaling rate. Link width Communicates the maximum physical Link width of the slot connector. Depending upon the Adapter form factor, the connector can be one of the following Link widths: x1, x4, x8, or x16. See the corresponding Adapter form factor specification for additional details on the maximum physical Link width supported by a given form factor. An Adapter that uses a small maximum physical Link width may be inserted into a slot that supports a larger maximum physical Link width and interoperate. 10

11 Negotiable Link width The component attached to a slot may be capable of negotiating intermediate Link widths between x1 and xn (where N is the maximum number of Lanes routed). If intermediate Link widths are supported, then all supported Link widths are included within a pair of parenthesis as part of the label. A slot is permitted to support any of the following negotiated Link widths: x1, x2, x4, x8, x12, or x16. Power requirement Communicates the maximum power the slot can supply to an Adapter. Unless otherwise constrained by the form factor, the default power is 25 W. Therefore, if the default 25 W is required by the Adapter, the power attribute component is not included in the label. For the x1 CEM form factor, a slot may supply only 10 W. If so, the label includes a 10W power attribute component. For the x16 CEM form factor, a slot may supply 75 W (example usage model is a graphics Adapter slot). If so, the label includes a 75W power attribute component. For x16 CEM Adapters designed to the PCI Express x16 Graphics 150W-ATX Specification, an Adapter requires an additional connector and associated power. This information is not communicated through the slot label but through the Adapter label or the optional enclosure label. Slot number (optional) A slot may be identified by the addition of the word slot and a slot number. The label n where n indicates the slot number within an enclosure. The word slot is optional. These attributes are concatenated together to construct a slot label as follows: Slot n PCIeG xl (X n, X n-1, X 0 ) pw Where: n = Optional slot number G = Not present (supports 2.5 GT/s signaling only) or signaling generation (e.g., 2 indicates the adapter supports 5.0 GT/s and 2.5 GT/s signaling) L = Maximum physical Link width of the slot connector X = Negotiated Link width. If no negotiated Link widths values are provided, the Adapter supports all intermediate Link widths up to the maximum size of the edge connector. pw = Not present if default maximum or power in Watts In addition to the above attributes, the label must comply with the following: A slot label can be either silkscreen or an adhesive label. A slot label must be clearly legible. The recommended minimum height for an adhesive label or the silkscreen on a slot is 2.5 mm. This minimum height guideline applies to all PCIe form factors. 11

12 The label should be used in all marketing collateral and specification sheets as well as user documentation for consistency. The slot label is permitted to be attached to a slot, a motherboard, or a riser card. Table 2 illustrates a number of examples of how the Adapter attribute components are combined to create the associated compliant label. Table 2: Example Platform Slot Attribute Labels Example Label PCIe x1 10W PCIe x16 75W PCIe x8 (4,1) PCIe x16 (8,1) 75W PCIe2 x16 (16,1) 5 PCIe x8 Explanation Slot with a x1 maximum Link width using 2.5 GT/s signaling and provides 10 W power to an Adapter Slot using a x16 connector, supports x16, x12, x8, x4, x2, and x1 adapters, uses 2.5 GT/s signaling and provides 75 W power to an Adapter Slot using a x8 connector but with a x4 maximum Link width using 2.5 GT/s signaling and provides 25 W power to an Adapter Slot using a x16 connector but with a x8 maximum or a x1 negotiable Link width using 2.5 GT/s signaling and provides 75 W power to an Adapter Slot with x16 connector, supports a x16 maximum Link width or x1 negotiable Link width using 5.0 GT/s signaling and provides 25 W power to an Adapter Slot number 5. Slot with a x8 connector, supports x8, x4, x2, and x1 adapters, uses 2.5 GT/s signaling and provides 25 W power to an Adapter Figure 2: Example Platform Slot Label 12

13 1.4. Enclosure Attribute Labeling A platform or I/O enclosure can provide an additional label. The label is constructed using the rules for the platform slot label (refer to Section 1.3) with the addition of support for the PCI Express x16 Graphics 150W-ATX Specification. This is accomplished by adding a +EXT75" to the label if the enclosure supplies the additional power required for high-end graphics devices. The attributes are concatenated together to construct a enclosure label as follows: PCIeG xl (X n, X n-1, X 0 ) pw Where: n = Optional slot number (can be vertically placed above PCIe label, optionally include word slot ) G = Not present (supports 2.5 GT/s signaling only) or signaling generation (e.g., 2 indicates the adapter supports 5.0 GT/s and 2.5 GT/s signaling) L = Maximum physical connector width X = Negotiated Link width pw = Not present if default maximum or power in Watts +EXT75 = If the enclosure supports the PCI Express x16 Graphics 150W-ATX Specification An example of an optional enclosure label is shown in Figure 3. 0 PCIe2 x16 75W 1 PCIe x8 (8,4,1) 2 PCIe x1 3 PCIe 1 10W Figure 3: Example Enclosure Label 13

14 1.5. Reconciling Adapter and Slot Attributes Given the variance in Adapter and slot attribute options, the information in Table 3 through Table 7 must be applied to determine the actual operational and performance characteristics of the combination. Table 3: Reconciled Maximum Signaling Level Examples Adapter Signaling Label Slot Signaling Label Maximum Signaling Supported PCIe PCIe 2.5 GT/s signaling PCIe2 PCIe 2.5 GT/s signaling PCIe PCIe2 5.0 GT/s signaling PCIe2 PCIe2 5.0 GT/s signaling Adapter Link Width Label Table 4: Reconciled Maximum Link Width Examples Slot Link Width Label x1 x1 x1 x4 x4 x4 x8 x8 x8 x16 x16 x16 x1 x4 or x8 or x16 x1 x4 x8 or x16 x4 x8 x8 or x16 x8 Maximum Link Width Supported If an Adapter edge connector is physically larger than the slot connector, the Adapter cannot physically mate with the slot. For example, a x16 Adapter cannot be inserted into x1 slot due to the connector mismatch. If an Adapter edge connector is physically smaller than the slot connector, the Adapter can physically mate with the slot. For example, a x8 Adapter can be inserted into a x16 slot. 14

15 Adapter Link Width / Negotiated Link Width x4 x8 Table 5: Reconciled Maximum Negotiated Link Width Examples Slot Link Width / Negotiated Link Width x4 (4,1) or x8 (8,4,1) or x16 (16,4,1) or x16 (16,8,4,1) x8 (8,4,1) or x16 (16,8,1) or x16 (16,8,4,1) x16 x16 (16,8,4,1) or x16 (16,8,1) x16 x16 (16,4,1) x16 (4,1) x4 x16 (16,8,1) x16 (8,4,1) x8 x8 (8,4,1) x8 (4,1) x4 x8 (8,4,1) x8 (8,4,1) x8 x16 (8,4,1) x16 (4,1) x4 x16 (8,4,1) x16 (8,4,1) x8 x16 (16,8,4,1) x16 (8,4,1) x8 x16 (16,8,4,1) x16 (16,8,4,1) x16 Maximum Negotiated Link Width Supported x4 x8 Adapter Power Label Slot Power Label Table 6: Reconciled Operational Power Examples Optional Enclosure Power Label Present Operational Power <none> <none> <none> 25 W Adapter and slot power match 10W 10W 10W 10 W Adapter and slot power match 75W 75W 75W 75 W Adapter and slot power match 75W +EXT75W 75W +EXT75W 150 W Adapter and slot power match 10W <none> <none> 10 W slot by default delivers 25 W <none> 10W <none> May not operate if the Adapter requires more than 10 W to function <none> 75W 75W +EXT75W 25 W Slot provides sufficient power on primary connector, second connector on Adapter is not present and, therefore, is ignored 75W or 75W +EXT75W <none> <none> May not operate other than diagnostics mode due to insufficient power 75W +EXT75W 75W 75W May not operate other than in reduced performance or diagnostics mode due to insufficient power 15

16 The examples in Table 7 illustrate how to reconcile a complete Adapter label with a complete slot label to determine the complete functional qualities of the combination. Table 7: Reconciled Label Examples Adapter Label Slot Label Reconciled Attributes PCIe x1 10W PCIe x1 10W 2.5 GT/s signaling, x1 Link width, 10 W power supplied to the Adapter PCIe x8 (8,4,1) PCIe x8 2.5 GT/s signaling, x8 Link width, 25 W power supplied to the Adapter PCIe x8 (8,4,1) PCIe x8 (4,1) 2.5 GT/s signaling, x4 Link width, 25 W power supplied to the Adapter PCIe x8 PCIe x8 (4,1) 2.5 GT/s signaling, x4 Link width, 25 W power supplied to the Adapter PCIe x16 (16,8,4,1) 75W PCIe x16 75W 2.5 GT/s signaling, x16 Link width, 75 W power supplied to the Adapter PCIe x16 (16,8,4,1) 75W PCIe x16 (8) 75W 2.5 GT/s signaling, x8 Link width, 25 W power supplied to the Adapter PCIe x16 (16,8,4,1) 75W PCIe x16 (4) 75W 2.5 GT/s signaling, x4 Link width, 75 W power supplied to the Adapter PCIe2 x16 75W PCIe x16 75W 5.0 GT/s signaling, x16 Link width, 75 W power supplied to the Adapter PCIe2 x16 75W PCIe2 x16 75W 5.0 GT/s signaling, x16 Link width, 75 W power supplied to the Adapter PCIe x16 (16,8,4,1) 75W PCIe x16 75W 2.5 GT/s signaling, x16 Link width, 75 W power +EXT 75W supplied to the Adapter. Adapter may not operate at full performance or only in diagnostics mode if the additional graphics power connector is not present. 16

17 2 2. Additional PCI Express Logo Requirements Pursuant to a change in Article 12.1 (9) of the PCI-SIG Bylaws, approved by the Board on September 3, 2003, so long as a company maintains its membership, they are granted a fully paid, non-transferable, non-sub licensable, world wide license to make use of PCI-SIG s trademarks, service marks, and logo types in compliance with the then current Trademark and Logo Usage Guidelines. (Upon expiration or termination of membership, a Member's license granted hereunder shall automatically terminate.) The Corporation shall retain the right to restrain a Member s use of the Corporation s trademarks, service marks, and logos in violation of the Trademarks and Logo Usage Guidelines. The Trademark and Logo Usage guidelines prohibit the use of PCI-SIG logos on packaging and advertising materials without the written consent of the PCI-SIG. The words PCI-SIG-COMPLIANT, PCI-SIG-COMPATIBLE, and any other words suggesting that a product complies with the specification being developed by PCI-SIG, may only be used if the Member s product in question has passed all compliance testing required by PCI-SIG and if the product appears on the Integrators list set forth on PCI-SIG s Web site. 17

18 18 PCI EXPRESS LABEL SPECIFICATION AND USAGE GUIDELINES, REV. 1.0