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Method and apparatus for ensuring compatibility on a high performance serial bus

  • US 7,701,966 B2
  • Filed: 11/21/2005
  • Issued: 04/20/2010
  • Est. Priority Date: 02/17/2000
  • Status: Active Grant
First Claim
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1. A non-transitory machine-readable medium containing instructions which when executed by a computer ensure compatibility in a data communications system compliant with the IEEE-1394b standard and having at least one B PHY, by performing the acts of:

  • determining whether the B PHY desires to communicate at a speed on a bus having a peer device not capable of communicating at said speed; and

    speed filtering said peer device if said B PHY determines that said peer device cannot communicate at said speed, said speed filtering comprising sending a designated symbol to said peer device.

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