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DJLXT972MLCA4 Datasheet(PDF) 52 Page - Intel Corporation |
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DJLXT972MLCA4 Datasheet(HTML) 52 Page - Intel Corporation |
52 / 92 page Intel ® LXT972M Single-Port 10/100 Mbps PHY Transceiver 52 Datasheet Document Number: 302875-005 Revision Date: 27-Oct-2005 5.9 Monitoring Operations 5.9.1 Monitoring Auto-Negotiation Auto-negotiation can be monitored as follows: • Register bit 17.7 is set to ‘1’ once the auto-negotiation process is completed. • Register bits 1.2 and 17.10 are set to ‘1’ once the link is established. • Register bits 17.14 and 17.9 can be used to determine the link operating conditions (speed and duplex). Note: When the LXT972M Transceiver detects incorrect polarity for a 10BASE-T operation, Register bit 17.5 is set to ‘1’. 5.9.2 Monitoring Next Page Exchange The LXT972M Transceiver offers an Alternate Next Page mode to simplify the next page exchange process. Normally, Register bit 6.1 (Page Received) remains set until read. When Alternate Next Page mode is enabled, Register bit 6.1 is automatically cleared whenever a new negotiation process takes place. This action prevents the user from reading an old value in bit 6.1 and assuming that Registers 5 and 8 (Partner Ability) contain valid information. Additionally, the LXT972M Transceiver uses Register bit 6.5 to indicate when the current received page is the base page. This information is useful for recognizing when next pages must be resent due to a new negotiation process starting. Register bits 6.1 and 6.5 are cleared when read. |
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