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Method and apparatus for programming an array controller in a flash memory device

  • US 5,765,184 A
  • Filed: 09/27/1996
  • Issued: 06/09/1998
  • Est. Priority Date: 10/26/1993
  • Status: Expired due to Fees
First Claim
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1. A memory array controller apparatus for accessing a main memory array, comprising:

  • programmable code store circuitry comprising;

    a nonvolatile memory storing instructions for accessing the main memory array;

    an address multiplexer for selecting addresses corresponding to instructions from one of the nonvolatile memory and an alternative source for execution in accordance with a mode of operation of the programmable code store circuitry; and

    main array interface circuitry selectively coupled to one of the nonvolatile memory and the main memory for performing read, erase, and program operations, wherein the main array interface is coupled to access the main memory array in accordance with instructions from the nonvolatile memory during a read mode of the programmable code store circuitry, wherein the main array interface is coupled to permit modification of the nonvolatile memory in accordance with instructions from the alternative source during a non-read mode of the programmable code store circuitry.

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