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SLXT973QEA3V Datasheet(PDF) 10 Page - List of Unclassifed Manufacturers

Part # SLXT973QEA3V
Description  Cortina Systems짰 LXT973 10/100 Mbps Dual-Port Fast Ethernet PHY Transceiver
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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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