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System and method of on-circuit asynchronous communication, between synchronous subcircuits

  • US 20070081414A1
  • Filed: 04/06/2006
  • Published: 04/12/2007
  • Est. Priority Date: 09/12/2005
  • Status: Abandoned Application
First Claim
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1. System for on-circuit asynchronous communication, between synchronous subcircuits, comprising:

  • a first synchronous subcircuit regulated by a first clock frequency, suitable for sending requests to a second synchronous subcircuit regulated by a second clock frequency, the first subcircuit transmitting data to the second subcircuit through a first mesochronous unidirectional communication link, and the second subcircuit transmitting tokens to the first subcircuit through a second mesochronous unidirectional communication link;

    wherein the first mesochronous unidirectional communication link comprises a memory organized as a queue situated at the end of communication of the first link, and wherein an elementary memory location of the queue has a predetermined size;

    wherein the second synchronous subcircuit comprises sending means for transmitting to the first subcircuit availability tokens of an additional elementary memory location in the queue as soon as an elementary memory location of the queue is read by the second subsystem; and

    the first subcircuit comprises means of transmission for transmitting directly to the second subcircuit data of a size at most equal to the size corresponding to the elementary memory locations available in the queue.

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