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Electronic apparatus with replaceable power source

  • US 4,823,323 A
  • Filed: 06/25/1986
  • Issued: 04/18/1989
  • Est. Priority Date: 07/29/1985
  • Status: Expired due to Term
First Claim
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1. An electronic apparatus comprising:

  • memory means for storing data;

    control means for controlling input and output of data in and from said memory means by supplying write and read signals to the memory means;

    replaceable power supply means for supplying power to said control means and to said memory means; and

    memory protect means for detecting the removal of said replaceable power supply means and, in response thereto, disabling the supply of the write and read signals output by said control means to said memory means during the replacement of said replaceable power supply means, said memory protect means including first switch means responsive to an operation necessary for removing the replaceable power supply means to disconnect the write and read signals from said memory means and second switch means for initializing and operating said control means to address the memory means from an initial address when reconnecting the write and read signals in response to a condition after replacement of said replaceable power supply means, thereby preventing data of said memory means from being destroyed after replacing said replaceable power supply means.

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