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Controlling access to a power supply memory

  • US 8,775,779 B2
  • Filed: 12/01/2010
  • Issued: 07/08/2014
  • Est. Priority Date: 10/10/2006
  • Status: Active Grant
First Claim
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1. A method for loading instructions into a programmable power supply having memory and a battery used to supply an output of the power supply, the method comprising:

  • maintaining a power output for the programmable power supply during instruction loading operations of a firmware update process, the instruction loading operations comprising;

    restricting access to a portion of the programmable power supply'"'"'s memory, the memory coupled to a controller of the programmable power supply;

    based on an interruption of power, initiating a battery backup mode;

    receiving an unlock command from a remote host;

    receiving, subsequent to receipt of the unlock command, instructions through an internal bus used for communication with the power supply, wherein the received instructions are stored in the portion of the memory; and

    based on receipt of the unlock command, restoring access to the portion of the memory so that the controller can execute the received instructions for a predetermined period of time that begins upon receipt of the unlock command.

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