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Remote program monitor method and system using a system-under-test microcontroller for self-debug

  • US 5,903,718 A
  • Filed: 09/16/1996
  • Issued: 05/11/1999
  • Est. Priority Date: 09/16/1996
  • Status: Expired due to Fees
First Claim
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1. A remote program monitor system using a system-under-test microcontroller for self-debug, said remote program monitor system comprising:

  • a host computer;

    a system-under-test (SUT) that includes a read-only memory (ROM) and a microcontroller for executing a program under test, the microcontroller having an interrupt input, wherein one or more enable debugger signals received at the interrupt input causes the microcontroller to execute a debugger program contained in the ROM, said debugger program monitoring execution by the microcontroller of instructions within said program under test and selectively performing a debug operation in response to execution of a selected instruction in said program under test, and wherein one or more other enable debugger and disable debugger signals limit the debut functions of the debugger program such that interference with the real-time operation of the program under test is minimized; and

    a standard serial connection between the host computer and the SUT.

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