Patent ID: 7433247
Filing Date: 2008-10-07
Classification: G11C

Abstract:
1. A method for reading configuration stored in a fuse memory during a power-up operation in a nonvolatile memory, the fuse memory having a pre-check fuse cells memory section, a main fuse cells memory section, storing configuration information, and a post-check fuse cells memory section, comprising: performing a pre-check operation during the power-up operation by reading data from the pre-check fuse cells memory section to determine if the read data from the pre-check fuse cells memory section matches with a predefined pre-check data; reading the configuration information during the power-up operation from the main fuse cells memory section, and storing the configuration information for use in operating the non-volatile memory; and performing a post-check operation during the power-up operation by reading data from the post-check fuse cells memory section to determine if the read data from the post-check fuse cells memory section matches with a predefined post-check data; and if the pre-check and post-check operations result in determining matches, then completing the read of configuration information, else retrying the pre-check operation, the reading of the configuration information and the post-check operation.