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US 6,618,785 B1Granted
Method and apparatus for automatic detection and healing of signal pair crossover on a high performance serial bus
AssigneeApple Computer, Inc.
InventorColin Whitby-Streves
Life of this patent
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Abstract
An automatic crossover and healing process is disclosed for the P1394b standard. In particular, a crossover process is disclosed which comprises coupling the transmitting logic of a PHY to TPA, and coupling the receive logic of a PHY to TPB.
Claims6
In a data communications system having a P1394b-compliant bus and a PHY which wishes to join the bus, a method for automatically detecting and healing a crossover comprising:
- determining, by the PHY, whether it has received a tone;
- if the PHY has not received a tone, then examining a random Boolean value;
- and
- if the value of said random Boolean value is true, then implementing, by said PHY, a crossover process.
1 more element
In a data communications system having a P1394b-compliant bus and a PHY which wishes to join the bus, a method for automatically detecting and healing a crossover comprising:
- determining, by the PHY, whether it has received a tone;
- if the PHY has not received a tone, then examining a random Boolean value;
- if the value of said random Boolean value is true, determining, by said PHY, whether said PHY is sending a tone;
- if said PHY is sending a tone, then waiting a predetermined period of time;
- further determining by said PHY if said PHY has received a tone;
- and
- if said PHY has not received a tone, then implementing, by said PHY, a crossover process.
4 more elements
Dependencies are inferred from the claim text.