intel? 82577 gbe phy specification update january 2012 revision 1.7
82577 specification update 2 revision history information in this document is provided in connection with in tel products. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by th is 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 warranti es relating to fitness for a particular purpose, merchantabili ty, or infringement of any patent, copyright or other intellectual property right. a "mission critical application" is any application in which failure of the intel product could result, directly or indirectly, in personal injury or death. should you purchase or use intel's products for any such mission critical application, you shall indemnify and hold intel and its subsidiaries, subcontractors and affiliates, and the directors, officers, and employees of each, harmless against all claims costs, damages, and expenses and reasonable attorneys' fees arising out of, directly or indirectly, any claim of product liabil ity, personal injury, or death arising in any way out of such mission critical application, whether or not intel or its subcontracto r was negligent in the design, manufacture, or wa rning of the intel product or any of its parts. intel may make changes to specifications and product descriptions at any time, without notice. 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 th em. the information here is subject to change without notice. do not finalize a design with this information. the products described in this document may contain design defect s or errors known as errata which may cause the product to dev iate 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 o rder. copies of documents which have an order number and are referenced in this document, or other intel literature, may be obtained by calling 1-800-548- 4725, or go to: http://www.intel.com/design/literature.htm . 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 ? 2012, intel corporation. all rights reserved. date revision description january 2012 1.7 added specification change #1. added sofware clarification #1. added specification clarification 2. february 2010 1.6 added thailand as a country of origin (coo) to figure 1. january 2010 1.5 added specification clarification #1. removed erratum #2. november 2009 1.4 removed specification change #1. added erratum #2. september 2009 1.3 initial public release.
3 82577 specification update 1.1 introduction and scope this document applies to the 82577 gbe phy. this document is an update to a published specification, the intel? 82577 gbe phy datasheet . it is intended for use by system manufacturers and soft ware developers. all product documents are subject to frequent revision, and new order numbers will ap ply. new documents may be added. be sure you have the latest information before finalizing your design. 1.2 product code and device identification ta b l e 1 and figure 1 describe the various identifying markin gs on each lead-free device package: table 1. markings device stepping top marking mm # description tray/tape and reel 82577lm a3 wg82577lm 903235 corporate mobile and workstation tape and reel 82577lm a3 wg82577lm 903236 corporate mobile and workstation tray 82577lc a3 wg82577lc 903237 consumer mobile tape and reel 82577lc a3 wg82577lc 903238 consumer mobile tray figure 1. typical top marking example with identifying ma rks (82577lc shown) pin 1 identifier ?'09 then "e3" rohs mark wafer lot no. concatenated with assembler vendor code text "intel" (no caps) in neo sans intel medium font; no ? intel product name country of origin (coo) china or thailand
82577 specification update 4 table 2. device ids 1.3 nomenclature used in this document this document uses specific terms, codes, and a bbreviations to describe changes, errata, sightings and/or clarifications that apply to silicon/steppings. see ta b l e 3 for a description. table 3. terms, codes, abbreviations device id code vendor id device id revision id 82577lm 0x8086 0x10ea n/a 82577lc 0x8086 0x10eb n/a name description specification changes modifications to the current publishe d specifications. these changes will be incorporated in the next release of the specifications. errata design defects or errors. errata may cause device behavior to deviate from published specifications. hardware and software designed to be used with any given stepping must assume that all errata documented for that stepping are present on all devices. specification clarifications greater detail or further highlights concerning a specific ation?s impact to a complex design situation. these clarifications will be incorporated in the next release of the specifications. documentation changes typos, errors, or omissions from th e current published specifications. th ese changes will be incorporated in the next release of the specifications. yes or no if the errata applies to a stepping, ?yes? is indicated fo r the stepping (for example: ?a0=yes? indicates errata applies to stepping a0). if the errata does not apply to stepping, ?no? is indicated (for example: ?a0=no? indicates the errata does not apply to stepping a0). doc document change or update that will be implemented. fix this erratum is intended to be fixed in a future stepping of the component. fixed this erratum has been previously fixed. nofix there are no plans to fix this erratum. eval plans to fix this erratum are under evaluation. (no mark) or (blank box) this erratum is fixed in listed stepping or specification change does not apply to listed stepping. red change bar /or bold this item is either new or modified from the previous version of the document. ds datasheet pdg platform design guide eds external data specification
5 82577 specification update 1.4 changes, errata, clarifications see section 1.3 for an explanation of terms, codes, and a bbreviations used in the following tables and discussions. table 4. summary of changes 1.4.1 specification changes ............................................................................ 5 1. updates to pxe/iscsi eeprom words ........................................... 5 1.4.2 specification clarifications ................... ................................................... 6 1. phy does not maintain gigabit link in low power states ................. 6 2. activity led functionality ............... ............................................. 6 1.4.3 software clarifications ........................................................................... 6 1. while in tcp segmentation offload, each buffer is limited to 64 kb .. 6 1.4.4 documentation changes......................................................................... 6 1.4.5 external errata ..................................................................................... 7 1. 9 kb jumbo frames not supported with pci express* (pcie*) spread spectrum clocking (ssc) ............................................................ 7 1.4.1 specification changes 1. updates to pxe/iscsi eeprom words word 0x30 (bits 2:0) is now defined as follows: bit(s) value port status clp (combo) executes iscsi boot option rom ctrl-d menu fcoe boot option rom ctrl-d menu 2:0 0pxe pxe displays port as pxe. allows changing to boot disabled, iscsi primary or secondary. displays port as pxe. allows changing to boot disabled, fcoe enabled. 1 boot disabled none displays port as disabled. allows changing to iscsi primary/secondary. displays port as disabled. allows changing to fcoe enabled. 2 iscsi primary iscsi displays port as iscsi primary. allows changing to boot disabled, iscsi secondary. displays port as iscsi. allows changing to boot disabled, fcoe enabled. 3 iscsi secondary iscsi displays port as iscsi secondary. allows changing to boot disabled, iscsi primary. displays port as iscsi allows changing to boot disabled, fcoe enabled. 4 fcoe fcoe displays port as fcoe. allows changing port to boot disabled, iscsi primary or secondary. displays port as fcoe allows changing to boot disabled. 7:5 reserved same as disabled. same as disabled. same as disabled. 4:3 same a before. 5 bit 5: formerly used to indicate is csi enable / disable, is no longer valid and is not checked by software. 15:7 same a before.
82577 specification update 6 1.4.2 specification clarifications 1. phy does not maintain gigabit link in low power states clarification: while operating in power states less th an d0 or operating system states other than s0, the phy is designed to negotiate to the lo west speed possible, and maintains a link in those states only at 10 mb/s or 100 mb/s. if the phy is connected to a link partner that is only capable of gigabit connections, the link is lost in these lower power states. this limitation is due to power requirements imposed by energy saving initiatives (such as energy star), as the additional power required to maintain gigabit connections might cause the system to exceed the level needed to meet the specifications. impact: when attached to a port that is limited to gigabit speed connections, the phy loses link in low power states, and therefore network functions normally available in those states, such as wake on lan (wol) or remote management, is not possible in that environment. 2. activity led functionality clarification: if a system based on the 82577 is co nnected to a hub, the acti vity led blinks for all network traffic present on the hub, not just traffic destined to the local port. connecting the system to a switch or router filters out most traffic not addressed to the local port. 1.4.3 software clarifications 1. while in tcp segmentation offload, each buffer is limited to 64 kb problem description: clarification: the 82577 supports 256 kb tcp packets; however, each buffer is limited to 64 kb since the data length field in the transmit descriptor is only 16 bits. this restriction increases driver implementation complexity if the op erating system passes down a scatter/gather element greater than 64 kb in length. this ca n be avoided by limitin g the offload size to 64 kb. investigation has concluded that the increase in data transfer size does not provide any noticeable improvements in lan performance. as a result, intel network software drivers limit the data transfer size in all drivers to 64 kb. please note that linux operating systems only support 64 kb data transfers. for further details about how intel network soft ware drivers address this issue, refer to technical advisory ta-191. 1.4.4 documentation changes none active.
7 82577 specification update 1.4.5 errata 1. 9 kb jumbo frames not supported with pci express* (pcie*) spread spectrum clocking (ssc) problem: 82577lm is unable to support 9 kb jumb o frames when pcie ssc is enabled in intel ? 5 series express chipset. implication: enabling 9 kb jumbo frames with pcie ssc enabled might result in data overflow/ underflow errors resulting in packets transmitted/received with crc errors. workaround: for 9 kb jumbo frames su pport, pcie ssc must be disabled. status: no fix for 9 kb jumbo frames.
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