Virtual Field Programmable Gate Array Triple Modular Redundant Cell Design
Final rept. 17 Jul 2002-30 Jan 2004
SCHAFER (W J) ASSOCIATES INC ALBUQUERQUE NM
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Space systems are becoming increasingly dependent on field programmable gate arrays FPGAs and yet the higher gate-count devices are vulnerable to the space environment. To compensate for this effect, triple modular redundancy tools have been developed. Unfortunately these tools complicate the users design and they cannot cope with the so-called single event functional interrupt SEFI. In this report, a method referred to as the virtual FPGA has been developed to provide an alternative. It is based on the combination of three FPGAs and radiation-hardened support circuitry. The basic idea involves voting each of up to 512 user inputoutput pins on all three commercial FPGAs using a radiation-hardened voting circuit. A hardened microcontroller manages the configurations of each of the three FPGAs and monitors upset statistics. Advanced packaging is used to form a component that seems similar in form to the single FPGAs that the concept intends to replace.
- Electrical and Electronic Equipment
- Electromagnetic Shielding
- Ground Support Systems and Facilities for Space Vehicles