Patents by Inventor Chee H. Lee

Chee H. Lee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fault-tolerant architecture for in-circuit programming
    Patent number: 7237145
    Abstract: The present invention provides a method and apparatus for providing fault-tolerance for in-circuit programming systems. The invention operates by storing a minimal set of code to initialize the in-circuit programming process in a protected memory so that if the in-circuit programming process fails, the in-circuit programming process can be restarted from the protected memory. This type of fault-tolerance is especially important in systems which allow the code which accomplishes the in-circuit programming to be modified by the in-circuit programming process. One embodiment of the present invention provides a multiplexer to selectively switch between a normal boot code sequence and a protected boot code sequence, as well as a watchdog timer to monitor the in-circuit programming process to determine whether the in-circuit programming process is not progressing properly.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: June 26, 2007
    Assignee: Macronix International Co., Ltd.
    Inventors: Albert C. Sun, Chee H. Lee, Chang L. Chen
  • Fault-tolerant architecture for in-circuit programming
    Publication number: 20040030953
    Abstract: The present invention provides a method and apparatus for providing fault-tolerance for in-circuit programming systems. The invention operates by storing a minimal set of code to initialize the in-circuit programming process in a protected memory so that if the in-circuit programming process fails, the in-circuit programming process can be restarted from the protected memory. This type of fault-tolerance is especially important in systems which allow the code which accomplishes the in-circuit programming to be modified by the in-circuit programming process. One embodiment of the present invention provides a multiplexer to selectively switch between a normal boot code sequence and a protected boot code sequence, as well as a watchdog timer to monitor the in-circuit programming process to determine whether the in-circuit programming process is not progressing properly.
    Type: Application
    Filed: April 7, 2003
    Publication date: February 12, 2004
    Applicant: Macronix International Co., Ltd.
    Inventors: Albert C. Sun, Chee H. Lee, Chang L. Chen
  • Fault-tolerant architecture for in-circuit programming
    Publication number: 20020091963
    Abstract: The present invention provides a method and apparatus for providing fault-tolerance for in-circuit programming systems. The invention operates by storing a minimal set of code to initialize the in-circuit programming process in a protected memory so that if the in-circuit programming process fails, the in-circuit programming process can be restarted from the protected memory. This type of fault-tolerance is especially important in systems which allow the code which accomplishes the in-circuit programming to be modified by the in-circuit programming process. One embodiment of the present invention provides a multiplexer to selectively switch between a normal boot code sequence and a protected boot code sequence, as well as a watchdog timer to monitor the in-circuit programming process to determine whether the in-circuit programming process is not progressing properly.
    Type: Application
    Filed: March 13, 2002
    Publication date: July 11, 2002
    Inventors: Albert C. Sun, Chee H. Lee, Chang L. Chen
  • Fault-tolerant architecture for in-circuit programming
    Patent number: 6401221
    Abstract: The present invention provides a method and apparatus for providing fault-tolerance for in-circuit programming systems. The invention operates by storing a minimal set of code to initialize the in-circuit programming process in a protected memory so that if the in-circuit programming process fails, the in-circuit programming process can be restarted from the protected memory. This type of fault-tolerance is especially important in systems which allow the code which accomplishes the in-circuit programming to be modified by the in-circuit programming process. One embodiment of the present invention provides a multiplexer to selectively switch between a normal boot code sequence and a protected boot code sequence, as well as a watchdog timer to monitor the in-circuit programming process to determine whether the in-circuit programming process is not progressing properly.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: June 4, 2002
    Assignee: Macronix International Co., Ltd.
    Inventors: Albert C. Sun, Chee H. Lee, Chang L. Chen
  • Fault-tolerant architecture for in-circuit programming
    Publication number: 20020032879
    Abstract: The present invention provides a method and apparatus for providing fault-tolerance for in-circuit programming systems. The invention operates by storing a minimal set of code to initialize the in-circuit programming process in a protected memory so that if the in-circuit programming process fails, the in-circuit programming process can be restarted from the protected memory. This type of fault-tolerance is especially important in systems which allow the code which accomplishes the in-circuit programming to be modified by the in-circuit programming process. One embodiment of the present invention provides a multiplexer to selectively switch between a normal boot code sequence and a protected boot code sequence, as well as a watchdog timer to monitor the in-circuit programming process to determine whether the in-circuit programming process is not progressing properly.
    Type: Application
    Filed: August 9, 2001
    Publication date: March 14, 2002
    Inventors: Albert C. Sun, Chee H. Lee, Chang L. Chen
  • Fault-tolerant architecture for in-circuit programming
    Patent number: 6282675
    Abstract: The present invention provides a method and apparatus for providing fault-tolerance for in-circuit programming systems. The invention operates by storing a minimal set of code to initialize the in-circuit programming process in a protected memory so that if the in-circuit programming process fails, the in-circuit programming process can be restarted from the protected memory. This type of fault-tolerance is especially important in systems which allow the code which accomplishes the in-circuit programming to be modified by the in-circuit programming process. One embodiment of the present invention provides a multiplexer to selectively switch between a normal boot code sequence and a protected boot code sequence, as well as a watchdog timer to monitor the in-circuit programming process to determine whether the in-circuit programming process is not progressing properly.
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: August 28, 2001
    Assignee: Macronix International Co., Ltd.
    Inventors: Albert C. Sun, Chee H. Lee, Chang L. Chen