A SECURE DATA STORAGE DEVICE

摘要

A secure data storage device (1) having data storage memory (6) and an access control circuit (4). The access control circuit (4) maintains an attempt count of invalid access attempts and an access account of valid accesses to the memory (6). The access control circuit (4) disables access to the memory (6) when the attempt count or the access count exceeds a respective predetermined value. The counts are maintained in memory cells with fusible links.