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220 Software Developer’s Manual
Register Descriptions
Category Offset Abbreviation Name R/W Page
TX DMA 03000h TXDMAC
TX DMA Control (applicable to the 82544GC/
EI only)
R/W 319
TX DMA 03828h TXDCTL Transmit Descriptor Control R/W 319
TX DMA 0282Ch TADV
Transmit Absolute Interrupt Delay Timer (not
applicable to the 82544GC/EI)
R/W 321
TX DMA 03830h TSPMT TCP Segmentation Pad and Threshold R/W 322
RX DMA 02828h RXDCTL Receive Descriptor Control R/W 324
RX DMA 05000h RXCSUM Receive Checksum Control R/W 325
Receive
05200h-
053FCh
MTA[127:0] Multicast Table Array (n) R/W 327
Receive
05400h-
05478h
RAL(8n) Receive Address Low (n) R/W 329
Receive
05404h-
0547Ch
RAH(8n) Receive Address High (n) R/W 329
Receive
05600h-
057FCh
VFTA[127:0]
VLAN Filter Table Array (n)
Not applicable to the 82541ER
R/W 330
Wakeup 05800h WUC Wakeup Control R/W 331
Wakeup 05808h WUFC Wakeup Filter Control R/W 332
Wakeup 05810h WUS Wakeup Status R 333
Wakeup 05838h IPAV IP Address Valid R/W 335
Wakeup
05840h-
05858h
IP4AT
IPAT (82544GC/
EI)
IPv4 Address Table
IP Address Table (82544GC/EI)
R/W 336
Wakeup
05880h-
0588Ch
IP6AT
IPv6 Address Table (not applicable to the
82544GC/EI)
R/W 337
Wakeup 05900h WUPL Wakeup Packet Length R/W 338
Wakeup
05A00h-
05A7Ch
WUPM Wakeup Packet Memory R/W 338
Wakeup
05F00h-
05F18h
FFLT Flexible Filter Length Table R/W 338
Wakeup
09000h-
093F8h
FFMT Flexible Filter Mask Table R/W 339
Wakeup
09800h-
09BF8h
FFVT Flexible Filter Value Table R/W 340
Statistics 04000h CRCERRS CRC Error Count R 341
Statistics 04004h ALGNERRC Alignment Error Count R 341
Statistics 04008h SYMERRS Symbol Error Count R 342
Statistics 0400Ch RXERRC RX Error Count R 342
Statistics 04010h MPC Missed Packets Count R 343
Statistics 04014h SCC Single Collision Count R 343
Statistics 04018h ECOL Excessive Collisions Count R 344
Statistics 0401Ch MCC Multiple Collision Count R 344
Statistics 04020h LATECOL Late Collisions Count R 345
Statistics 04028h COLC Collision Count R 345
Statistics 04030h DC Defer Count R 346
Statistics 04034h TNCRS Transmit - No CRS R 346
Statistics 04038h SEC Sequence Error Count R 347
Statistics 0403Ch CEXTERR Carrier Extension Error Count R 347
Statistics 04040h RLEC Receive Length Error Count R 348
Statistics 04048h XONRXC XON Received Count R 348
Statistics 0404Ch XONTXC XON Transmitted Count R 349
Statistics 04050h XOFFRXC XOFF Received Count R 349