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Reprogrammable controller containing multiple programs

  • US 5,826,205 A
  • Filed: 07/12/1995
  • Issued: 10/20/1998
  • Est. Priority Date: 07/19/1994
  • Status: Expired due to Term
First Claim
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1. A reprogrammable controller for a device, comprising:

  • an electrically erasable and programmable memory having a first program for controlling an operation of the device;

    a read only memory for storing a second program and a third program, the second program for reprogramming the first program in the electrically erasable and programmable memory, and the third program for initiating the first program and the second program;

    a serial interface;

    a serial data transmission line coupled to the serial interface;

    an external communications apparatus coupled to the serial data transmission line for providing data, to be used in reprogramming the first program by the second program, through the serial data transmission line; and

    means for allowing initiation of one of the first program and the second program by the third program, wherein the third program starts program initiation, once the controller has been brought into use, based upon an interrogation which checks at least one input signal of at least one sensor of the object to determine whether a threshold value is present, wherein, when the threshold value is present, the second program controls the controller, and when the threshold value is not present, the first program controls the controller.

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