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SLXT973QEA3V Datasheet(PDF) 10 Page - List of Unclassifed Manufacturers |
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SLXT973QEA3V Datasheet(HTML) 10 Page - List of Unclassifed Manufacturers |
10 / 20 page Page 10 Cortina Systems® LXT973 10/100 Mbps Dual-Port Fast Ethernet PHY Transceiver LXT973 PHY Transceiver Specification Update 249737, Revision 10.0 20 March 2007 5.0 Errata 5.0 Errata Item 1: Speed LED Stays Active During Reset Problem During reset, the speed LED on both ports stays lit. The other LED functions are turned off during reset. This erratum has been confirmed on all LED modes with the speed function- ality display while RESET is held active. All other functions such as Link, Activity, Duplex Status, and MII Isolate turn off during reset. Implication Monitoring the speed LED during reset may be misleading. The LED functions properly during normal operation. Workaround None. Status There are no plans to fix this erratum. Item 2: Delay of Link While in Auto MDI/MDIX Enabled, Forced 100 Mbps Mode Problem The LXT973 PHY Transceiver may have difficulty determining the MDI/MDIX setting under the following conditions: • Forced 100 Mbps mode • Auto MDI/MDIX is enabled • Link partner is auto-negotiation enabled Implication The LXT973 PHY Transceiver may take several seconds to establish link under the following conditions: • LXT973 PHY Transceiver is forced to 100 Mbps • Auto MDI/MDIX is enabled • Link partner is auto-negotiation enabled Workaround Disable auto MDI/MDIX when in forced 100 Mbps mode. Status There are no plans to fix this erratum. Item 3: Establishment of Link in Forced 100 Mbps Mode Problem Link may not come up reliably when the following occurs: • The LXT973 PHY Transceiver is in forced 100 Mbps mode and link is down. • The link partner is configured to auto-negotiate. • The link partner cannot handle instantaneous jitter on the MLT3 signal during link-up. Implication If this condition occurs, communication between the LXT973 PHY Transceiver and its link partner may not establish. This condition does not occur in other speed setting combina- tions. Workaround Configure the LXT973 PHY Transceiver in auto-negotiation rather than forced 100 Mbps mode, or configure the link partner to forced 100 Mbps instead of auto-negotiation to establish link. Status There are no plans to fix this erratum. |
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