System and Method for Controlling Access to Addressable Integrated Circuits

A circuitry access system for controlling access to addressable circuit elements of an integrated circuit, each circuit element having an address, the system comprising:

• a first storage element having a first listing of unique identifiers, each of said unique identifiers representing one of the addressable circuit elements, said first listing including a first subset of restricted access unique identifiers;
• a second storage element in electrical connection with said first storage element, said second storage element having a plurality of memory locations each for receiving one of said unique identifiers of said first listing to which said second storage element has access, said second storage element including an output for allowing a user of the integrated circuit to access the addressable circuit elements corresponding to any unique identifiers in said second storage element;
• a passcode entry circuit for receiving a passcode from a user of the integrated circuit;
• and
• a mode circuit for changing access to said first listing in said first storage element, based on said passcode, wherein if said passcode corresponds to authorized access to said first subset, said mode circuit allows said first subset to be written to said second storage element.