Patent ID: 7030647
Filing Date: 2006-04-18
Classification: G06F,H03K

Abstract:
1. A method of operating a programmable logic integrated circuit comprising: after providing power to the integrated circuit, in a first state, reading a first pattern stored at a first address from a nonvolatile configuration memory of the programmable logic integrated circuit; following the first state, in a second state, comparing the first pattern to an expected first pattern and returning to the first state if the first pattern does not match the expected first pattern; if the first pattern matches the expected first pattern, continuing to a third state, reading a second pattern stored at a second address from the nonvolatile configuration memory of the programmable logic integrated circuit; and following the third state, in a fourth state, comparing the second pattern to an expected second pattern and returning to the first state if the second pattern does not match the expected second pattern.