Multimedia card interface method, computer program product and apparatus

DC
  • US 7,565,469 B2
  • Filed: 10/14/2005
  • Issued: 07/21/2009
  • Est. Priority Date: 11/17/2004
  • Status: Active Grant
First Claim
Patent Images

1. A method comprising:

  • driving information comprising a first information portion and a second information portion from a first unit to a second unit over a bus having a signal line by;

    driving the first information portion from the first unit to the second unit over the signal line during a command execution;

    driving the signal line from the second unit to cause a change of state during the command execution;

    interpreting the change of state of the signal line at the first unit to have a first meaning and in response driving the second information portion to the signal line from the first unit during the command execution;

    driving the signal line from the second unit to cause again the change of state during the command execution; and

    interpreting at the first unit the change of state of the signal line occurring after driving the second information portion to the signal line to have a second meaning different from the first meaning.

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