Appendix B: Auto Negotiation
Summary of MII Registers and Bit Definitions
SmartBits System Reference 207
1 Jabber Detect 1 = Jabber condition detected
0 = No jabber condition detected
0 Extended Capability 1 = Extended register capabilities
0 = Extended register set capabilities only
Table C-5. Bit Definitions for MII Register 4 (AN Advertisement) and Register 5 (AN Link
Partner)
Bit Name Description
15 Next Page 1 = Next Page ability supported
0 = Next Page ability not supported
14 Acknowledge Used by AN to indicate that the device has received its
Link Partner’s Link Code Word.
13 Remote Fault Remote fault information.
12 Technology Ability Reserved
11 Reserved
10 1 = Flow control bit supported
0=Notsupported
9100BASE-T4
8 100BASE-TX Full Duplex
7100BASE-TX
610BASE-TFullDuplex
5 10BASE-T Half Duplex
Table C-4. Bit Definitions for MII Register 1 (Status)
Bit Name Description
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