82546GB Datasheet, PDF (3/16 Pages) Intel Corporation – Gigabit Ethernet Controller Specification Update

82546GB GIGABIT ETHERNET CONTROLLER SPECIFICATION UPDATE
CONTENTS
CONTENTS .........................................................................................................................................................3
PREFACE ............................................................................................................................................................5
NOMENCLATURE ..............................................................................................................................................5
COMPONENT IDENTIFICATION VIA PROGRAMMING INTERFACE ..............................................................5
GENERAL INFORMATION .................................................................................................................................6
82546GB Component Marking Information ..................................................................................................6
SUMMARY TABLE OF CHANGES ....................................................................................................................7
Codes Used in Summary Tables ..................................................................................................................7
SPECIFICATION CHANGES ..............................................................................................................................8
ERRATA ..............................................................................................................................................................9
1.
LSO Premature Descriptor Write Back...............................................................................................9
2.
XOFF from Link Partner can Pause Flow-Control (XON/XOFF) Transmission..................................9
3.
Transmit Descriptor use of RS for non-data (Context & Null) Descriptors .........................................9
4.
Message Signaled Interrupt Feature May Corrupt Write Transactions .............................................10
5.
Link Establishment or Communication Problems in
Fiber Mode When Link Partner Does Not Fully Comply with the IEEE 802.3 Specification..............10
6.
Wakeup Packet Memory (WUPM) cleared upon reset......................................................................11
7.
Unexpected RMCP ACK packets in ASF mode ................................................................................11
8.
Exceeding PCI Power Management Specification
Limit of 375mA current during reset and power state transitions ......................................................11
9.
Inbound and Outbound reads not fully decoupled in PCI-X mode ....................................................11
10. Hang in PCI-X systems due to 2k Buffer Overrun during Transmit Operation ..................................12
11. CRC Errors due to Rate Adaptation FIFO Overflow in Fiber Mode...................................................12
12. PCI-X Arbitration Interaction with Particular Bridges Can Result in Controller Hang ........................13
13. Transmit Descriptors May Be Written Back to Host, Even Without the RS Bit Set ...........................13
14. Legacy Transmit Descriptor Write-Back May Occur
Before the Packet Data Associated with the Descriptor is Fetched ..................................................13
15. PCI-X Burst Write Transactions to Memory
Mapped Registers at Non-Qword-Aligned Offsets Fail......................................................................14
SPECIFICATION CLARIFICATIONS ................................................................................................................15
1.
82546GB Ports Can be Disabled Individually....................................................................................15
DOCUMENTATION CHANGES ........................................................................................................................16
3