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ADIN1111BCPZ-R7 数据表(PDF) 20 Page - Analog Devices |
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ADIN1111BCPZ-R7 数据表(HTML) 20 Page - Analog Devices |
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20 / 109 page  Data Sheet ADIN1111 BRINGING UP 10BASE-T1L LINKS analog.com Rev. A | 20 of 109 Table 17. Determination of Leader/Follower by Autonegotiation1 Local Remote Local Remote AN_ADV_FORCE_MS AN_ADV_MST AN_LP_ADV_FORCE_MS AN_LP_ADV_MST Leader/Follower Resolution 0 0 0 0 Leader/Follower Follower/Leader 0 0 0 1 Follower Leader 0 1 0 0 Leader Follower 0 1 0 1 Leader/Follower Follower/Leader 0 X 1 0 Leader Follower 0 X 1 1 Follower Leader 1 0 0 X Follower Leader 1 1 0 X Leader Follower 1 0 1 0 Configuration Fault Configuration Fault 1 0 1 1 Follower Leader 1 1 1 0 Leader Follower 1 1 1 1 Configuration Fault Configuration Fault 1 X means don't care. Completion of Autonegotiation When autonegotiation completes, the autonegotiation complete in- dication register bit (AN_LINK_GOOD) is set. This bit indicates completion of the autonegotiation transmission, and that the ena- bled PHY technology is either bringing up its link or that it has brought up its link. When autonegotiation has completed and the link is up, the auto- negotiation complete register bit (AN_COMPLETE) is set. When this bit is read as 1, the autonegotiation process is complete, the PHY link is up, and the contents of the AN_ADV_ABILITY and AN_LP_ADV_ABILITY register bits are valid. Link Status The status of the link can be determined by reading the link status register bit (AN_LINK_STATUS). This bit latches low. When read as 1, this bit indicates that a valid link is established. If this bit reads 0, the link has failed since the last time it was read. If the value of this bit is read as 0, this bit must be read a second time to determine the link status (see Latch Low Registers section). If the link is dropped, the autonegotiation process restarts automati- cally. Autonegotiation can be restarted by request through a write to the autonegotiation restart bit (AN_RESTART) in the autonego- tiation control register (AN_CONTROL). |
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