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Data processor and data processing system

  • US 6,209,045 B1
  • Filed: 06/18/1999
  • Issued: 03/27/2001
  • Est. Priority Date: 05/31/1996
  • Status: Expired due to Fees
First Claim
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1. A data processor comprising:

  • a serial interface unit including a control signal terminal and a data input/output terminal;

    a memory unit connected to the serial interface unit and having a first area and a second area; and

    a processing unit;

    wherein when said serial interface unit receives a first control request signal at said control signal terminal, said serial interface unit receives a first program for debugging executed by the processing unit from said data input/output terminal, wherein said memory unit stores said first program to said second area and stores a second program which is to be subjected to a debugging operation by the first program to said first area, and wherein said processing unit branches a first predetermined address in the first area corresponding to receiving a second signal from said serial interface unit.

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