pcie2.0总线规范.doc

PCI Express? Base Specification Revision 2.0 December 20, 2006 2 Revision Revision History DATE 1.0 Initial release. 07/22/02 1.0a Incorporated Errata C1-C66 and E1-E4.17. 04/15/03 1.1 Incorporated approved Errata and ECNs. 03/28/05 2.0 Added 5.0 GT/s data rate and incorporated approved Errata and ECNs. 12/20/06 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 this specification. Questions regarding the PCI Express Base Specification or membership in PCI-SIG may be forwarded to: Membership Services E-mail: administration@ Phone: 503-619-0569 Fax: 503-644-6708 Technical Support techsupp@ DISCLAIMER This PCI Express Base Specification is provided “as is” with no warranties whatsoever, including any warranty of merchantability, noninfringement, 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 ? 2002-2006 PCI-SIG PCI EXPRESS BASE SPECIFICATION, REV. 2.0 3 Contents OBJECTIVE OF THE SPECIFICATION 21 DOCUMENT ORGANIZATION 21 DOCUMENTATION CONVENTIONS 22 TERMS AND ACRONYMS 23 REFERENCE DOCUMENTS 29 1. INTRODUCTION 31 1.1. A THIRD GENERATION I/O INTERCONNECT 31 1.2. PCI EXPRESS LINK 33 1.3. PCI EXPRESS FABRIC TOPOLOGY 35 1.3.1. Root Complex 35 1.3.2. Endpoints 36 1.3.3. Switch 39 1.3.4. Roo