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Control apparatus for controlling memory unit capable of selecting an electrically erasable non-volatile memory and loading information stored therein

  • US 5,564,032 A
  • Filed: 11/09/1993
  • Issued: 10/08/1996
  • Est. Priority Date: 11/20/1992
  • Status: Expired due to Term
First Claim
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1. A control apparatus for controlling a memory unit having an electrically erasable nonvolatile memory for storing nonvolatile memory information used in a process in an electrical equipment and a flash memory storing a processing program for executing the process in said electrical equipment, said control apparatus comprising:

  • a loading program for loading flash memory information into said flash memory, which loading program is stored in said electrically erasable nonvolatile memory;

    memory selecting means for selecting said flash memory when a first selecting information is supplied to said memory selecting means, and selecting said electrically erasable nonvolatile memory when a second selecting information is supplied to said memory selecting means;

    loading means for supplying the second selecting information to said memory selecting means under a condition in which a program voltage is supplied from an external power supply to said loading means and for loading flash memory information in accordance with the loading program stored in said electrically erasable nonvolatile memory selected by said memory selecting means;

    recover information for recovering the loading program stored in said electrically erasable nonvolatile memory, which recovering information is stored in said flash memory;

    a control terminal connected to said memory selecting means; and

    recover means for recovering the loading program stored in said electrically erasable nonvolatile memory in accordance with the recovering information stored in said flash memory under a condition in which said flash memory is selected by said memory selecting means to which the first selecting information is supplied via said control terminal.

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