Functional safety systems and methods for secure access to non-volatile memory

A system, comprising:

• one or more processing cores;
• an interconnect coupled to the one or more processing cores;
• a memory security controller;
• a security mode selection controller coupled to the memory security controller;
• and
• a memory interface controller coupled to the memory security controller and the security mode selection controller and configured to couple to a non-volatile memory;
• wherein the security mode selection controller is configured to:
• determine a number of pending access requests associated with the memory security controller;
• determine a number of incoming responses from the non-volatile memory to the memory security controller;
• and
• control which cryptographic functional safety process is applied to at least one of a request or a response based on at least one of the number of pending access requests or the number of incoming responses.

A method, comprising:

• receiving, from one or more processing cores, access requests for data stored in a non-volatile memory device;
• determining a number of pending access requests of the access requests associated with the non-volatile memory device;
• determining a number of incoming responses from the non-volatile memory device;
• and
• selecting which cryptographic functional safety process to apply to at least one of a request or a response based on at least one of the number of pending access requests or the number of incoming responses.