Auto-negotiation for multiple ports using shared logic
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United States of America Patent
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Sep 5, 2000
Grant Date -
N/A
app pub date -
Apr 14, 1999
filing date -
Apr 17, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A data communication device having multiple ports is provided with an auto-negotiation system for performing auto-negotiation with multiple link partners connected to the ports. The auto-negotiation system has a memory and an auto-negotiation unit including transmit, receive and arbitration state machines for performing transmit, receive and arbitration state diagrams compliant with the IEEE 802.3 Standard. The auto-negotiation unit operates in a time-division multiplexing mode using successive time slots for supporting auto-negotiation operations for different ports. The memory is used for storing state diagram variables for a port in a time interval between the time slots assigned to that port.
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