Flexible Approaches to Fault-Tolerant Microprocessors for Space Applications
Abstract
Although fault-tolerant microprocessors are available and used in space missions, they generally lack the flexibility required to easily adapt to new technologies and meet the requirements of the variety of new missions. This paper describes new hardening techniques that have been successfully applied to the LEON3 soft-processor. External monitoring techniques provide high robustness at low cost in a non-intrusive manner. On the other hand, selective redundancy techniques can be used to reduce overheads by protecting only the most critical components of the processor. Using these techniques, a microprocessor can be easily customized for an optimal balance among reliability, cost, performance and power consumption requirements.
- Publication:
-
DASIA 2015 - DAta Systems in Aerospace
- Pub Date:
- September 2015
- Bibcode:
- 2015ESASP.732E..15E