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Capturing test/emulation and enabling real-time debugging using an FPGA for in-circuit emulation

  • US 7,188,063 B1
  • Filed: 10/10/2001
  • Issued: 03/06/2007
  • Est. Priority Date: 10/26/2000
  • Status: Active Grant
First Claim
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1. A method of obtaining debug information, comprising:

  • executing a sequence of instructions by a device under test (DUT), wherein said DUT comprises a data line and a clock line;

    executing the sequence of instructions by an emulator device emulating the functions of the DUT and executing the sequence of instructions in lock-step fashion with the DUT, wherein said emulator device shares a clock signal with said DUT;

    the DUT conveying I/O read information to the emulator device over said data line during a data transfer phase; and

    a host computer system reading real-time state and debug information from the emulator device without interrupting the DUT.

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