802.3协议是这么说的
28.1.4.1 Interoperability with existing 10BASE-T devices During Auto-Negotiation, FLP Bursts separated by 16 ± 8 ms are transmitted. The FLP Burst itself is a series of pulses separated by 62.5 ± 7 µs. The timing of FLP Bursts will cause a 10BASE-T device that is in the LINK TEST PASS state to remain in the LINK TEST PASS state while receiving FLP Bursts. An Auto-Negotiation able device must recognize the NLP sequence from a 10BASE-T Link Partner, cease transmis-sion of FLP Bursts, and enable the 10BASE-T PMA, if present. If the NLP sequence is detected and if the Auto-Negotiation able device does not have a 10BASE-T PMA, it will cease transmission of FLP Bursts, forcing the 10BASE-T Link Partner into the LINK TEST FAIL state(s) as indicated in Figure 14–6.
也就是说如果没有10BASE-T PMA，对方会进入LINK TEST FAIL状态，也就是LINK失败了吧。LM3S有没有兼容10BASE-T的能力，谢谢
