Emulation devices, systems and methods utilizing state machines

  • US 5,329,471 A
  • Filed: 06/29/1993
  • Issued: 07/12/1994
  • Est. Priority Date: 06/02/1987
  • Status: Expired due to Term
First Claim
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1. An emulation device which enables a functional circuit to support its own emulation, comprising:

  • a serial scan testability interface having at least first and second scan paths, said first scan path being provided for applying digital information to the functional circuit for use in emulation of the functional circuit; and

    state machine circuitry connected to said second scan path, said state machine circuitry having a sequence of states responsive to said second scan path and corresponding to emulation command codes.

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