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Intel® 82598 Power Supply Sequencing/Power On Reset/ LAN_PWR_GOOD Design Clarifications

December 2008 321136-001EN Revision 1.0 Legal Lines and Disclaimers INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL® PRODUCTS. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT. EXCEPT AS PROVIDED IN INTEL'S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, INTEL ASSUMES NO LIABILITY WHATSOEVER, AND INTEL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY, RELATING TO SALE AND/OR USE OF INTEL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. Intel products are not intended for use in medical, life saving, life sustaining, critical control or safety systems, or in nuclear facility applications. Intel may make changes to specifications and product descriptions at any time, without notice. Intel Corporation may have patents or pending patent applications, trademarks, copyrights, or other intellectual property rights that relate to the presented subject matter. The furnishing of documents and other materials and information does not provide any license, express or implied, by estoppel or otherwise, to any such patents, trademarks, copyrights, or other intellectual property rights. IMPORTANT - PLEASE READ BEFORE INSTALLING OR USING INTEL® PRE-RELEASE PRODUCTS. Please review the terms at http://www.intel.com/netcomms/prerelease_terms.htm carefully before using any Intel® pre-release product, including any evaluation, development or reference hardware and/or software product (collectively, “Pre-Release Product”). By using the Pre-Release Product, you indicate your acceptance of these terms, which constitute the agreement (the “Agreement”) between you and Intel Corporation (“Intel”). In the event that you do not agree with any of these terms and conditions, do not use or install the Pre-Release Product and promptly return it unused to Intel. Designers must not rely on the absence or characteristics of any features or instructions marked “reserved” or “undefined.” Intel reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them. Products may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized errata are available on request. Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order. Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be obtained from: Intel Corporation P.O. Box 5937 Denver, CO 80217-9808 or call in North America 1-800-548-4725, Europe 44-0-1793-431-155, France 44-0-1793-421-777, Germany 44-0-1793-421-333, other Countries 708- 296-9333. Intel and Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States and other countries. *Other names and brands may be claimed as the property of others. Copyright © 2008, Intel Corporation. All Rights Reserved. 2 Design Clarifications—82598 Contents 1.0 2.0 Introduction ..............................................................................................................5 1.1 Products Affected ................................................................................................5 1.2 Reference Documents ..........................................................................................5 Proper Power Supply Sequencing ..............................................................................5 2.1 Voltage Rail Sequencing.......................................................................................6 2.2 Power On Reset Timing ........................................................................................7 2.2.1 POR_BYPASS Timing - Internally Generated.................................................7 2.2.2 LAN_PWR_GOOD Timing - Externally Generated...........................................7 Revision History Rev 1.0 Read the full Intel® 82598 Power Supply Sequencing/Power On Reset/ LAN_PWR_GOOD Design Clarifications.

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