Enaxc, Lsb | Intel Intel Gigabit Ethernet Controllers, PCI-X

Register Descriptions

Table 13-16. PHY Control Register Bit Description

	Field	Bit(s)	Description	Mode	HW Rst	SW Rst

			1b = Enable Auto-Negotiation Process.
			0b = Disable Auto-Negotiation Process.
			A write to this bit does not take effect
			until a software reset is asserted,
			Restart Auto-Negotiation is asserted, or
			Power Down transitions from power
			down to normal operation.
			When the port is switched from power
			down to normal operation, software
			reset and restart Auto-Negotiation are
			performed even if bits Reset and Restart
			Auto-Negotiation are not set by the	R/W	1b	Update
			programmer.
			If bit 12 is set to 0b and speed is
			manually forced to 1000 Mbps in bits 13
			and 6, then Auto-Negotiation is still
	Auto-Negotiation		enabled and only 1000BASE-T full
	Auto-Negotiation	12	duplex is advertised if bit 8 is set to 1b.
	Enable	12	duplex is advertised if bit 8 is set to 1b.
	Enable		1000BASE-T half duplex is advertised if
			1000BASE-T half duplex is advertised if
			bit 8 is cleared (0b). Duplex settings in
			other registers are ignored. Auto-
			Negotiation is required by IEEE for
			proper operation in 1000BASE-T.
			82544GC/EI only:	R/W	ANEG[3:2]	Update
			Auto-Negotiation enable takes on the		ENA_XC
			value set by external pins ANEG[3:0] on
			hardware reset only.
			Bit 12: ANEG[3:2] = 11b.
			If MODE[3:0] equals 001xb or 0111b,
			where x equals either 0b or 1b, then the
			ANE bit determines whether
			1000BASE-X Auto-Negotiation is on or
			off. Otherwise ANE determines whether
			10/100/1000BASE-T Auto-Negotiation
			is on or off.

	Speed Selection			R/W	0b	Update
	Speed Selection	13	See Speed Selection (MSB), bit 6.		ANEG[3:1]2
	(LSB)				MODE[3:0]
					MODE[3:0]

	Loopback	14	1b = Enable loopback.	R/W	0b	0b
	Loopback	14	0b = Disable loopback.	R/W	0b	0b
			0b = Disable loopback.

	Reset	15	1b = PHY reset.	R/W,	0b	Self
	Reset	15	0b = Normal operation.	SC	0b	Clear
			0b = Normal operation.	SC		Clear

1.82541xx and 82547GI/EI only.

2.82544GC/EI only.

Software Developer’s Manual

243

Image 257

Intel Intel Gigabit Ethernet Controllers, PCI-X manual Enaxc, Lsb

Contents

82540EP/EM, 82541xx, 82544GC/EI, 82545GM/EM, 82546GB/EB, Software Developer’s Manual Initial Public Release Date Version Comments Software Developer’s Manual Contents TCP Segmentation Use of Multiple Data Descriptors Software Developer’s Manual Vii Power Management 129 Introduction to Power Management 10.1.3 203 13.4.25 13.7.10 Appendix 82540EP/EM and 82545GM/EM Differences Xiv Overview Scope PCI Features Ethernet Controller FeaturesCSA Features 82547GI/EI Only Network Side Features Host Offloading Features Additional Performance Features Technology Features Additional Ethernet Controller Features Related Documents ConventionsMemory Alignment Terminology Register and Bit References Introduction Architectural Overview LAN a LAN B External ArchitecturePHY AGC, A/D Eeprom FlashECHO, Next Fext 1 PCI/PCI-X Core Interface Microarchitecture DMA Engine and Data Fifo 2 82547GI/EI CSA Interface 5 MII/GMII/TBI/Internal SerDes Interface Block 4 10/100/1000 Mb/s Receive and Transmit MAC Blocks Eeprom Interface 6 10/100/1000 Ethernet Transceiver PHY Flash Memory Interface DMA AddressingExample 2-1. Byte Ordering Little Endian Data Ordering IA Byte # LSB MSB Ethernet AddressingIntel Architecture Byte Ordering Interrupts Buffer and Descriptor Structure Hardware Acceleration CapabilityChecksum Offloading TCP Segmentation Architectural Overview Packet Address Filtering IntroductionPacket Reception Receive Descriptor Rdesc Layout Receive Data StorageReceive Descriptor Format Receive Status RDESC.STATUS Layout Receive Descriptor Status FieldPIF Ipcs Tcpcs RSV Ixsm EOP Receive Receive Descriptor Errors Field RXE IPE Tcpe RSV Receive Errors RDESC.ERRORS LayoutRSV SEQ CXE Special Descriptor Field Layout Receive Descriptor Special FieldPRI CFI Vlan PRI Receive Descriptor Fetching Algorithm Receive Descriptor Fetching Receive Descriptor Queue Structure Receive Descriptor Write-BackReceive Descriptor Packing Null Descriptor Padding Receive Descriptor Ring Structure Receive Interrupts Receive Timer InterruptReceive Interrupt Delay Timer / Packet Timer Rdtr Packet Delay Timer Operation State Diagram Receive Interrupt Absolute Delay Timer Radv Small Receive Packet Detect Receive Packet Checksum Offloading 8 82544GC/EI Receive InterruptsReceive Descriptor Minimum Threshold ICR.RXDMT Receiver Fifo Overrun Packet Type HW IP Checksum HW TCP/UDP Checksum Calculation Supported Receive Checksum Capabilities GC/EI Supported Receive Checksum Capabilities MAC Address FilterPacket Type HW IP Checksum HW TCP/UDP Checksum Packet Type HW IP Checksum SNAP/VLAN Filter Packet Transmission9.3 IPv4 Filter 9.4 IPv6 Filter Transmit Descriptors Transmit Data Storage Legacy Transmit Descriptor Format Transmit Descriptor Tdesc Layout Legacy ModeTransmit Descriptor Tdesc Layout Transmit Descriptor Legacy Descriptions CMD Transmit Descriptor Description LegacySTA CSS 10. Transmit Command TDESC.CMD Layout Transmit Descriptor Command Field FormatIDE VLE Dext RSV Ifcs EOP 11. Transmit Status Layout Transmit Descriptor Status Field Format 12. Special Field TDESC.SPECIAL Layout Transmit Descriptor Special Field Format 5 TCP/IP Context Transmit Descriptor Format 13. Transmit Descriptor Tdesc Layout Type = 0000b 6 TCP/IP Context Descriptor Layout Transmit Description Descriptor Offload 14. Transmit Descriptor Tdesc Layout Transmit Description 6.1 TCP/UDP Offload Transmit Descriptor Command FieldTucmd Dtyp 82544GC/EI only 15. Command Field TDESC.TUCMD LayoutIDE RSV Dext TSE TCP 16. Transmit Status Layout 7 TCP/IP Data Descriptor Format6.2 TCP/UDP Offload Transmit Descriptor Status Field Popts 17. Transmit Descriptor Tdesc Layout Type = 0001bPopts RSV STA Dcmd Dtyp Dtalen 18. Command Field TDESC.DCMD Layout 7.1 TCP/IP Data Descriptor Command FieldIDE VLE Dext TSE Ifcs EOP Reserved 7.2 TCP/IP Data Descriptor Status Field19. Transmit Status Layout 7.4 TCP/IP Data Descriptor Special Field 7.3 TCP/IP Data Descriptor Option Field20. Packet Options Field TDESC.POPTS Layout RSV Txsm Ixsm 21. Special Field TDESC.SPECIAL Layout Transmit Descriptor Ring Structure Transmit Descriptor Ring Structure Transmit Descriptor Write-back Transmit Descriptor Fetching Transmit Interrupts Delayed Transmit Interrupts Transmission Process Assumptions Packet Format TCP Segmentation PerformanceTCP Segmentation Data Fetch Control TCP/UDP Data FCS 3936 TCP Segmentation Indication TCP Partial Pseudo-Header Checksum TCP Segmentation Use of Multiple Data Descriptors Options IP and TCP/UDP HeadersVersion IP Hdr Offset High Header Checksum Type of service Version IP Hdr Length FragmentFragment Offset Low TCP Header Destination Port Sequence NumberLength Checksum Urgent Pointer Options Byte1 Byte0 Destination Port Byte3 Byte2 Byte1 Byte0 Source Port Destination Port Length Checksum Transmit Checksum Offloading with TCP Segmentation 17. UDP Pseudo Header Diagram for IPv4 9 IP/TCP/UDP Header Updating 19. Overall Data Flow 9.2 TCP/IP/UDP Header for the Subsequent Frames 9.1 TCP/IP/UDP Header for the First Frame 9.3 TCP/IP/UDP Header for the Last Frame IP/TCP/UDP Transmit Checksum Offloading Ipcss Receive and Transmit Description Mandatory PCI Registers PCI ConfigurationAddress Description PCI Specification Update for the latest stepping information Addr Base Address Registers Field Bits Read Initial Description Write Value All base address registers have the following fields Offset Space Expansion ROM Base Address Address Next Pointer Capabilities Linked List Bits Initial Value Description PCI definition for more details 82547GI/EI Status Register Layout PCI-X Capability ID PCI-X Configuration RegistersNext Capability Byte Offset Bits Read Initial PCI-X CommandWrite Value Maximum Memory Read Byte Count. This register sets Bits Read Intial Description Write Value PCI-X StatusUSC SCD Reserved and Undefined Addresses Command Register as follows Message Signaled Interrupt Configuration Registers Message Signaled Interrupts1MSI Capability ID Bits Read Initial Description Write Value 05h Message Control 3.1.4 Message Address Commands3.1.5 Message Upper Address 3.1.6 PCI Commands Abr PCI-X Commands Accepted PCI/PCI-X Command as a TargetTransaction Target PCI Commands PCI-X Commands Transaction Cause PCI Commands PCI-X Commands Memory Write Operations PCI/PCI-X Command Usage MWI Bursts Master Write Command Usage Algorithm Memory Read Operations PCI-X Command UsageMW Bursts Rules for Memory Read Operations Outstanding Memory Read Cache Line Information1 Target Transaction Termination LAN DisableInterrupt Assignment 82547GI/EI Only CardBus Application 82541PI/GI/EI Only General Overview Eeprom Interface Stepping Vendor ID Device ID Description Component Identification Via Programming InterfaceComponent Identification Eeprom Device and Interface Signature and CRC Fields Software Access Command Line Parameters Eeupdate Utility Ethernet Controller Address Map Eeprom Address Map1Word Used Bit Image For the 82541xx and 82547GI 82545GM 82540EP LAN a82541xx and 82547GI/EI only 82546GB/EB only 82545GM 82541xx ASF 82540EP/EM Address Hi Byte Low Byte Word Description Default HW AccessGC/EI and 82541ER Eeprom Address Map Software Compatibility Word Word 03h Ethernet Address Words 00h-02hSoftware Compatibility Word Word 03h Bit Name Description Eeprom Image Version Word 05h SerDes Configuration Word 04hCompatibility Fields Word 05h 07h PBA Number Word 08h, 09h Initialization Control Word 1 Word 0Ah Initialization Control Word 1 Word 0Ah Subsystem Vendor ID Word 0Ch Subsystem ID Word 0Bh Vendor ID Word 0Eh Device ID Word 0Dh, 11h1Initialization Control Word 2 Word 0Fh Initialization Control Word 2 Word 0Fh 82541PI/GI Only Software Defined Pins Control Word 10h1, 20h Common Power Word 12hPHY Register Address Data Words 10h, 11h, and 13h 1Eh OEM Reserved Words Words 10h, 11h, 13h 1Fh Software Defined Pins Control Word 10h, 20h Bit Description Default CSA Port Configuration 2 Word 21hCSA Port Configuration 2 Word 21h 21 D3 Power Word 22h low byte 20 D0 Power Word 22h high byteCircuit Control Word 21h Reserved Words 23h 2Eh 82541PI/GI/EI and 82547GI/EI Only 10. Initial Management Control Register SettingsManagement Control Word 13h1, 23h2 11. SMBus Slave Address SMBus Slave Address Word 14h1 low byte, 24h low byte 12. Initialization Control Initialization Control 3 Word 14h1 high byte, 24h high byte82546GB/EB uses INTB# For Address 24h High Byte / LAN a Boot Agent Main Setup Options Word 30h LED Configuration Defaults Word 2Fh227 IPv4 Address Words 15h 16h1 and 25h 26h 28 IPv6 Address words 17h 1Eh1 and 27h 2Eh 15. Boot Agent Main Setup Options BBS Boot Agent Configuration Customization Options Word 31hDBS SIG 16. Boot Agent Configuration Customization Options Word 31hMode DFU 17. Boot Agent Configuration Customization Options Word 32h Boot Agent Configuration Customization Options Word 32h 18. IBA Capabilities IBA Secondary Port Configuration Words 34h-35hIBA Capabilities Word 33h 20. WOL Mode and Functionality Word 20h 19. WOL Mode and Functionality Word 0AhChecksum Word Calculation Word 3Fh Eeprom Images 21. Flash Memory Manufacturers Parallel Flash MemoryManufacturer Number 124 Flash Interface Operation Flash Control and Accesses Write Accesses Read Accesses Flash Buffer Write Cycle 128 Assumptions Introduction to Power Management D3cold support Power States 1.2 D0u State Dr State 1.4 D3 Timing1.3 D0a D0 active Diagram # Power Up Off to Dr to D0u to D0a Transition from D0a to D3 and Back Without PCI Reset Transition From D0a to D3 and Back Without PCI Reset RST# Transition From D0a to D3 and Back with PCI Reset PCI Reset Sequence PCI Reset Without Transition to D3 Bits Default Description PCI Power Management RegistersCapability ID Byte Offset = 0 RO Next Item Pointer Byte Offset = 1 RO Eeprom Power Management Capabilities PMC 2 Bytes Offset = 2 ROReserved Software Developer’s Manual 139 3.6 Data Register Pmcsrbse Bridge Support ExtensionsByte Offset = 6 RO Byte Offset = 7 RO Wakeup Advanced Power Management Wakeup Acpi Power Management Wakeup Directed Exact Packet Wakeup PacketsPre-Defined Filters Directed Multicast Packet 3.1.3 Broadcast3.1.4 Magic Packet*1 Offset Field Value Action Comment Offset Field Value Action Comment Bytes + S a 3.1.5 ARP/IPv4 Request Packet1+ D + S a ARP Offset # of bytes Field Value Action Comment Directed IPv4 Packet1 Directed IPv6 Packet1 Flexible Filter IPX Diagnostic Responder Request Packet Example1+ S + D + S 3.4 IPv6 Neighbor Discovery Filter1 Directed IPX Packet Example CRC Wakeup Packet Storage 152 Link Interfaces Overview Ethernet Interface 1.2 8B10B Encoding/Decoding Internal SerDes Interface/TBI Mode- 1Gb/s1 Code Groups and Ordered Sets Gmii 1 Gb/sCode Group and Ordered Set Usage Code OrderedSet MII 10/100 Mb/s Internal Interface1Duplex Operation Half Duplex Full Duplex Packet Bursting Carrier Extension 1000 Mb/s Only Auto-Negotiation and Link Setup2 Auto-Negotiation and Link Setup1 Auto-Negotiation Link Configuration in Internal Serdes/TBI Mode1Link Speed Hardware Auto-Negotiation TXCW.txConfigWord Bit Description Software Auto-Negotiation Forcing Link Internal GMII/MII Mode Forcing Speed Using Auto-Speed Detection ASD Duplex Automatic Detection of Link Speed using SPD-INDMII Management Registers Comments Regarding Forcing Link Internal Serdes Mode1 Hardware Enabled Internal SerDes Mode1 Control Bit ResolutionInternal Serdes1 Mode Software Enabled Control Bit Effect on Control Bits Internal Serdes Mode1 Auto-Negotiation Skipped Internal PHY Mode Control Bit ResolutionGMII/MII Mode PHY Speed Indication GMII/MII Mode Force Speed GMII/MII Mode Auto-Speed Detection Internal Serdes Mode Loss of Signal/Link Status IndicationInternal PHY Mode GMII/MII Mode Force Link Adaptive IFS1 10/100 Mb/s Specific Performance Enhancements MAC Control Frames & Reception of Flow Control Packets Flow Control10. Flow Control Registers Register Name Description 3x MAC Control Frame Format Transmission of Pause Frames Discard Pause Frames and Pass MAC Control Frames External Control of Flow Control Operation1 Software Initiated Pause Frame Transmission 1 802.1q Tagged Frames 802.1q Vlan Packet FormatVlan Packet Format Comparison Packet #Octets 802.1q Vlan Packet Filtering Transmitting and Receiving 802.1q PacketsAdding 802.1q Tags on Transmits Stripping 802.1q Tags on Receives VFE Packet Reception Decision Table 178 Selecting an LED Output Source Configurable LED Outputs1 Blink Control Polarity Inversion Blink Control 182 Auto-Negotiation PHY Functionality and Features Next Page Exchanges Register Update Status 11.2 MDI/MDI-X Crossover copper onlyPin 1000BASE-T 11.2.2 10/100 Downshift 82540EP/EM Only Polarity Correction copper only Link Down Energy Detect copper only PHY Power Management copper onlyCable Length Detection copper only 11.4.2 D3 State, No Link Required copper only 11.4.3 D3 Link-Up, Speed-Management Enabled copper only11.4.4 D3 Link-Up, Speed-Management Disabled copper only Initialization Mdio Control Mode Overview of Link Establishment Determining Link State False Link Configuration ResultForced Operation Determining Duplex State Via Parallel Detection Auto Negotiation Link CriteriaParallel Detection 11.7.1 1000BASE-T Link Enhancements Using SmartSpeed11.7.3 10BASE-T SmartSpeed Pause And Asymmetric Pause Settings Low Power OperationAsmdir Settings Pause Setting Management Data Interface 11.11 1000 Mbps Operation Powerdown via the PHY RegisterSmart Power-Down DSP ECHO, Next 4DPAM5 Transmit Fifo Transmit Functions Low-Pass Filter Spectral ShaperLine Driver Transmit/Receive Flow Receive Functions 11.13 10 Mbps Operation 11.12 100 Mbps OperationDescrambler Viterbi Decoder/Decision Feedback Equalizer DFE PHY Line Length Indication 202 12.2.1 PCI/PCI-X interface Features of Each MACIntroduction1 204 IO BAR MAC Configuration Register Space12.2.3 SDP, LED, INT# output Eeprom Arbitration Shared EepromEeprom Map Shared Flash Flash Access Contention Pin sampled LAN device controlled Enable/Disable Values Sampled on Reset Interrupt Use Power ReportingMulti-Function Advertisement Summary EnabledInterrupt Line Used INTA# Register Conventions Register Descriptions Memory-Mapped Access to Flash Memory-Mapped Access to Internal Registers and MemoriesMemory-Mapped Access to Expansion ROM Memory and I/O Address Decoding Iodata IoaddrOffset Abbreviation Name Size Ioaddr AD C/BE#30 Bits Iodata Register Configurations Category Offset Abbreviation Name Ethernet Controller Register Summary82544GC/EI 82547GI/EI only Ipat 82544GC Fcruc XofftxcPRC64 Gprc Abbreviation Name Register Category82544GC/EI , 82541xx , or 82547GI/EI To the 82544GC/EI , 82541xx , or 82547GI PCI-X Register Access Split1 Ctrl 00000h R/W Main Register DescriptionsDevice Control Register Field Bits Initial Description Value Ctrl Register Bit Description Speed SLUIlos SDP0DATA FrcdplxSDP1DATA ADVD3WUC Field Bits Initial Description Device Status Register BEM = 0 64-bit mode Little-EndianStatus 00008h R Little-Endian Data Ordering Tbimode Status Register Bit DescriptionTxoff PCI66 AsdvPcixmode Pcixspd Eecd 00010h R/W EEPROM/Flash Control & Data RegisterEecd Register Bit Description 82544GC/EI Only Eegnt EereqEepres Eesize Eeprom Read Register Bit Description Eeprom Read Register1Eerd 00014h RW Done Start Eeprom Read Register Bit Description 82541xx and 82547GI/EI FLA 0001Ch R/W Flash Access1Flash Access FLA Ctrlext 00018h, R/W Extended Device Control Register10. Ctrlext Register Bit Description 23 16 SDP2IODIR SDP6IODIRSDP7IODIR Asdchk 11. GPI to SDP Bit Mappings Vreg PowerDown Linkmode 12 GC/EI Ctrlext Register Bit Description SwdpinshiSwdpiohi CTRL.RST 13 GC/EI GPI to SDP Bit Mapping Mdic 00020h R/W MDI Control Register RSV PHY REG Data 14. MDI Control Register Bit DescriptionRegadd Phyadd PHY Registers 15. PHY Register Bit Mode DefinitionsRegister Mode Description MSB Field Bits Description Mode HW Rst SW Rst 242 LSB Enaxc RO,L Software Developer’s Manual 245 246 For the 82541xx and 82547GI/EI Pause 82544GC/EI only 82541xx 82541xx 82547GI/EI 82541xx and 82547GI/EI only ANEG3 82544GC/EI OnlyANEG2 RF1 Software Developer’s Manual 251 23. Link Partner Ability Register Base Page Bit Description1 24. PHY Link Page Ability Bit Description1 82541xx and 82547GI/EI Only10BASE-T 100BASE-TX 1b 82541xx Software Developer’s Manual 255 Bits Field Description Mode HW Rst SW Rst ANEG0 MasterMASTER/SLAVE ANEG1 258 Software Developer’s Manual 259 DIS NLP SFD Preen Software Developer’s Manual 263 264 Software Developer’s Manual 265 266 82541/GI/ER and 82547GI B1 82541EI/82547GI B0 stepping 268 HCD NOK Software Developer’s Manual 271 272 Field Bits Description Mode HW Rst Ledactled SPEED1000LED SPEED100LED 276 Software Developer’s Manual 277 To Perform Operation MDI Read/Write Sequence Documented MDI Register 30 Operations151. MDI Register 30 Operations Flow Control Address High Flow Control Address LowFcal 00028h R/W Fcah 0002Ch R/W Vlan Ether Type Flow Control TypeFCT 00030h R/W VET 00038h R/W Fcttv 00170h R/W Flow Control Transmit Timer Value56. VET Register Bit Description 57. Fcttv Register Bit Description 58. Txcw Register Bit Description Transmit Configuration Word Register1Txcw 00178h R/W Rxcw 00180h R Receive Configuration Word Register1 59. Rxcw Register Bit Description Ledctl 00E00h RW LED Control1ANC LED1 ACTIVITY# LED0 LINKUP# 60. LED Control Bit Description1 Mode Encodings for LED Outputs1 Mode Pneumonic State / Event Indicated 61. Mode Encodings for LED Outputs PBA 01000H R/W Packet Buffer Allocation62. PBA Register Bit Description Field Bits Initial Value Description 63. ICR Register Bit Description Interrupt Cause Read RegisterICR 000C0H R Mdac RXT0Rxcfg GPISDP6 Interval Interrupt Throttling Register1ITR 000C4h R/W 64. ICS Register Bit Description Interrupt Cause Set RegisterICS 000C8h W IMS 000D0h R/W Interrupt Mask Set/Read Register65. IMS Register Bit Description To the 82544GC/EI IMC 000D8h W Interrupt Mask Clear Register 66. IMC Register Bit Description Rctl 00100h R/W Receive Control Register67. Rctl Register Bit Description SBP LPE MPELBM Rdmts Bsize BAMVFE Cfien Secrc PmcfBsex Flow Control Receive Threshold Low XON Enable 82544GC/EI , 82541xx , and 82547GI/EI onlyFcrtl 02160h R/W 68. Fcrtl Register Bit Description 69. Fcrth Register Bit Description Flow Control Receive Threshold HighFcrth 02168h R/W Receive Descriptor Base Address High Receive Descriptor Base Address LowRdbal 02800hR/W Rdbah 02804h R/W Receive Descriptor Head Receive Descriptor LengthRdlen 02808h R/W RDH 02810h R/W Receive Descriptor Tail Receive Delay Timer RegisterRDT 02818hR/W Rdtr 02820h R/W Radv 0282Ch RW Receive Interrupt Absolute Delay Timer1 Transmit Control Register Receive Small Packet Detect Interrupt1Rsrpd 02C00h R/W Tctl 00400hR/W Cold 76. Tctl Register Bit DescriptionPSP TCTL.COLD Tipg 00410R/W Transmit IPG RegisterRtlc Nrtu IPGR2 IPGR1 Ipgt 77. Tipg Register Bit Description IPGR2 Adaptive IFS Throttle AITAifs 00458R/W Tdbal 03800h R/W Transmit Descriptor Base Address Low78. Aifs Register Bit Description 79. Tdbal Register Bit Description Transmit Descriptor Length Transmit Descriptor Base Address HighTdbah 03804h R/W Tdlen 03808h R/W 82. TDH Register Bit Description Transmit Descriptor HeadTDH 03810h R/W Transmit Descriptor Tail Transmit Interrupt Delay ValueTDT 03818h R/W Tidv 03820h R/W Transmit Descriptor Control TX DMA Control 82544GC/EI onlyTxdmac 03000h R/W Txdctl 03828h R/W Lwthresh RSV1 Gran RSV Wthresh Hthresh Pthresh 86. Txdctl Register Bit Description Tadv 0382Ch RW Transmit Absolute Interrupt Delay Value1Gran Lwthresh Tspbp TCP Segmentation Pad And Minimum Threshold Tspmt 03830h RWTspbp Tsmt Software Developer’s Manual 319 Rxdctl 02828h R/W Receive Descriptor Control87. Rxdctl Register Bit Description Wthresh RSV Hthresh Pthresh Rxcsum 05000h R/W Receive Checksum Control88. Rxcsum Register Bit Description 3111 IPV6OFL IpofldTuofld Multicast Table Array Filter RegistersMTA1270 05200h-053FCh R/W 89. MTA Register Bit Description Destination Address Receive Address High Receive Address LowRAL 05400h + 8*n R/W RAH 05404h + 8∗n R/W VFTA1270 05600h 057FCh R/W Vlan Filter Table Array191. RAH Register Bit Description RAH Wakeup Control Register Wakeup RegistersWUC 05800h R/W 92. VFTA1270 Bit Description Wufc 05808h R/W Wakeup Filter Control RegisterApmpme SPM WUS 05810h R Wakeup Status Register 330 Ipav 5838h R/W IP Address Valid IP4AT 05840h 05858h R/W2 13.6.5 IPv4 AddressAddress Field Dword # Address Bits Initial Value Description IP6AT 05880h 0588Ch R/W 13.6.6 IPv6 AddressIPV6ADDR0 Dword # Address Bits Initial Value Description Flexible Filter Length Table Wakeup Packet LengthWakeup Packet Memory 128 Bytes LEN0 Flexible Filter Mask Table Ffmt 09000h 093F8h R/WLEN1 LEN2 Ffvt 09800h 09BF8h R/W Statistics RegistersFlexible Filter Value Table Alignment Error Count CRC Error CountCrcerrs 04000h R Algnerrc 04004h R RX Error Count Symbol Error CountSymerrs 04008h R Rxerrc 0400Ch R Single Collision Count Missed Packets CountMPC 04010h R SCC 04014h R Multiple Collision Count Excessive Collisions CountEcol 04018h R MCC 0401Ch R Collision Count Late Collisions CountLatecol 04020h R Colc 04028h R Transmit with No CRS Defer CountDC 04030h R Tncrs 04034h R Carrier Extension Error Count Sequence Error CountSEC 04038h R Cexterr 0403Ch R XON Received Count Receive Length Error CountRlec 04040h R Xonrxc 04048h R Xoff Transmitted Count XON Transmitted CountXoff Received Count Packets Received 64 Bytes Count FC Received Unsupported CountFcruc 04058h R PRC64 0405Ch R Packets Received 128-255 Bytes Count Packets Received 65-127 Bytes CountPRC127 04060h R PRC255 04064h R Packets Received 512-1023 Bytes Count Packets Received 256-511 Bytes CountPRC511 04068h R PRC1023 0406Ch R Good Packets Received Count Packets Received 1024 to Max Bytes CountPRC1522 04070h R Gprc 04074h R Multicast Packets Received Count Broadcast Packets Received CountBprc 04078h R Mprc 0407Ch R Good Octets Received Count Good Packets Transmitted CountGptc 04080h R Gorcl 04088h R/GORCH 0408Ch R Receive No Buffers Count Good Octets Transmitted CountGotcl 04090h R/ Gotch 04094 R Rnbc 040A0h R Receive Fragment Count Receive Undersize CountRUC 040A4h R RFC 040A8h R Receive Jabber Count Receive Oversize CountROC 040ACh R RJC 040B0h R 129. RJC Register Bit Description Management Packets Received Count1Mgtprc 040B4h R Total Octets Received Management Packets Dropped Count1Management Pkts Transmitted Count1 Totl 040C8h R/W / Toth 040CCh R Total Octets Transmitted130. Torl and Torh Register Bit Descriptions 131. Totl and Toth Register Bit Descriptions Total Packets Transmitted Total Packets ReceivedTPR 040D0h R TPT 040D4h R Packets Transmitted 65-127 Bytes Count Packets Transmitted 64 Bytes CountPTC64 040D8h R PTC127 040DCh R Packets Transmitted 256-511 Bytes Count Packets Transmitted 128-255 Bytes CountPTC255 040E0h R PTC511 040E4h R Packets Transmitted 1024 Bytes or Greater Count Packets Transmitted 512-1023 Bytes CountPTC1023 040E8h R PTC1522 040ECh R Broadcast Packets Transmitted Count Multicast Packets Transmitted CountMptc 040F0h R Bptc 040F4h R TCP Segmentation Context Transmit Fail Count TCP Segmentation Context Transmitted CountTsctc 040F8h R Tsctfc 040FCh R Receive Data Fifo Head Register Diagnostics RegistersReceive Data Fifo Tail Register Rdfh 02410h R/W Receive Data Fifo Tail Saved Register Receive Data Fifo Head Saved RegisterRdfhs 02420h R/W Rdfts 02428h R/W Transmit Data Fifo Head Register Receive Data Fifo Packet CountRdfpc 02430h R/W Tdfh 03410h R/W Transmit Data Fifo Head Saved Register Transmit Data Fifo Tail RegisterTdft 03418h R/W Tdfhs 03420h R/W Transmit Data Fifo Packet Count Transmit Data Fifo Tail Saved RegisterTdfts 03428h R/W Tdfpc 03430h R/W PBM 10000h 1FFFCh R/W Packet Buffer Memory151. Tdfpc Register Bit Description 152. PBM Bit Description 370 General Configuration Power Up State Receive Initialization General Initialization and Reset Operation Transmit Initialization Ipgt IPGR1 IPGR2 Fiber Copper 82544GC/EI Signal Ball Name and Function Signal Descriptions Carrier Sense Signal InterfaceReceive Data Receive Clock Signal Functions GMII/MII Features not SupportedSignal Function Pin Gmii 1000 Mbps Operations MII 10/100 Mbps Differences Direct PHY Indications to MAC Avoiding Gmii Test Modes MAC ConfigurationSignal Functions Not Supported CTRL.FD Link Setup CTRL.RFCE PHY Initialization 10/100/1000 Mb/s Copper Media Lanpwrgood Reset Operation 382 Software Developer’s Manual 383 Initialization of Statistics Fifo State DiagnosticsFifo Data Loopback Internal Loopback Testability SAMPLE/PRELOAD Instruction Extest InstructionIdcode Instruction Bypass Instruction 388 Appendix Changes From 82544EI/82544GC New Features Table A-1. Register Changes Register ChangesRegister Offset EEC Serial Flash Interface 82540EP/EM Differences 4 32-Bit PCI Support No TBI/Internal SerDes InterfaceSingle-Port Functionality