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Software Developer’s Manual xiii
Contents
13.8.5 Receive Data FIFO Packet Count ....................................................370
13.8.6 Transmit Data FIFO Head Register..................................................370
13.8.7 Transmit Data FIFO Tail Register ....................................................371
13.8.8 Transmit Data FIFO Head Saved Register ......................................371
13.8.9 Transmit Data FIFO Tail Saved Register .........................................372
13.8.10 Transmit Data FIFO Packet Count ...................................................372
13.8.11 Packet Buffer Memory......................................................................373
14 General Initialization and Reset Operation..................................................375
14.1 Introduction........................................................................................................375
14.2 Power Up State .................................................................................................375
14.3 General Configuration .......................................................................................375
14.4 Receive Initialization..........................................................................................376
14.5 Transmit Initialization.........................................................................................377
14.5.1 Signal Interface ................................................................................380
14.5.2 GMII/MII Features not Supported.....................................................381
14.5.3 Avoiding GMII Test Mode(s).............................................................382
14.5.4 MAC Configuration ...........................................................................382
14.5.5 Link Setup ........................................................................................383
14.6 PHY Initialization (10/100/1000 Mb/s Copper Media) .......................................384
14.7 Reset Operation ................................................................................................385
14.8 Initialization of Statistics ....................................................................................388
15 Diagnostics and Testability ...............................................................................389
15.1 Diagnostics........................................................................................................389
15.1.1 FIFO State........................................................................................389
15.1.2 FIFO Data.........................................................................................389
15.1.3 Loopback..........................................................................................389
15.2 Testability ..........................................................................................................390
15.2.1 EXTEST Instruction..........................................................................391
15.2.2 SAMPLE/PRELOAD Instruction .......................................................391
15.2.3 IDCODE Instruction..........................................................................391
15.2.4 BYPASS Instruction .........................................................................391
A Appendix (Changes From 82544EI/82544GC) ............................................393
B Appendix (82540EP/EM and 82545GM/EM Differences).........................395