Safety device for SPI flash

摘要

PROBLEM TO BE SOLVED: To provide a method and a system for protecting access to a peripheral device. In a system 20, at least one peripheral device is a memory device, and a safety device includes an interface for connecting to a bus that serves one or more peripheral devices, and a bus and one or more peripheral devices. It holds a definition that distinguishes between allowed and unallowed transactions with a connected and memory device, identifies the transaction on the bus that the bus master device attempts to access the memory device, and the transaction follows the definition. It comprises a processor configured to initiate a responding action in response to identifying an unauthorized transaction. [Selection diagram] Fig. 1