Triple modular redundancy (TMR) radiation hardened memory system

A space-based processing system comprising:

• a processor configured to execute mission software;
• and
• a memory system comprising:
• a redundancy comparator configured to detect differences between data stored redundantly in a first memory, a second memory, and a third memory, the redundancy comparator further configured to identify a memory error based on the detected differences,
• an error collection buffer configured to store a memory address associated with the memory error,
• a memory scrubber circuit configured to overwrite, at the memory address associated with the memory error, erroneous data with corrected data, the corrected data generated based on a majority vote performed among the first memory, the second memory, and the third memory, and
• a priority arbitrator configured to arbitrate between the overwriting performed by the memory scrubber and a functional memory access associated with the mission software execution.

A method for providing radiation hardened memory, the method comprising:

• detecting, by a redundancy comparator, differences between data stored redundantly in a first memory, a second memory, and a third memory;
• identifying, by the redundancy comparator, a memory error based on the detected differences;
• storing, by an error collection buffer, a memory address associated with the memory error;
• generating, by a memory scrubber circuit, corrected data based on a majority vote performed among the first memory, the second memory, and the third memory;
• overwriting, by the memory scrubber circuit, erroneous data with the corrected data, at the memory address associated with the memory error;
• and
• arbitrating, by a priority arbitrator, between the overwriting performed by the memory scrubber and a functional memory access associated with software execution performed by a processor configured to utilize the memory system.