Patent ID: 7969179
Filing Date: 2011-06-28
Classification: G06F,G11C

Abstract:
1. A method, comprising: providing a first integrated circuit having a first security feature; and providing a second integrated circuit having a second security feature, wherein the first integrated circuit and the second integrated circuit are formed comprising identical circuitry, and the first security feature is identical to the second security feature, wherein the first integrated circuit and the second integrated circuit each has a plurality of external terminals and a first external terminal assignment of the plurality of external terminals, wherein when the first security feature of the first integrated circuit is not enabled, the first integrated circuit comprises a non-secure integrated circuit having the first external terminal assignment, wherein when the second security feature of the second integrated circuit is enabled, the second integrated circuit comprises a secure integrated circuit having a second external terminal assignment, the second external terminal assignment being different from the first external terminal assignment, wherein the secure integrated circuit maps one of a chip select signal or a module to a first address value, and wherein the non-secure integrated circuit maps one of said chip select signal or said module to a second address value that is different than the first address value, wherein the non-secure integrated circuit is incapable of mapping said chip select signal to the first address value, and wherein the non-secure integrated circuit is incapable of mapping said module to the first address value, and wherein the second external terminal assignment of the secure integrated circuit is permanent and cannot be reversed.