Electrically EPROM e.g. NOR flash memory, integrity verifying method for e.g. onboard system, involves deducing integrity of electrically EPROM from verification of physical address groups, on completion of cycle of verification processes

摘要

The method involves dividing an electrically EPROM (EEPROM) into physical address groups, and executing a cycle of verification processes, where each process has selection and integrity verification steps. Each group is selected based on a group selection function, which guarantees that the groups are selected at the end of the cycle. Integrity of each selected group is verified against a control value. The processes are held in a time such that time intervals are elapsed between the processes. Integrity of the EEPROM is deduced from verification of the groups, on completion of the cycle. An independent claim is also included for an onboard system comprising a group selection function.