Anti-SEU configuration file storage system and storage method thereof

Abstract

The invention discloses an anti-SEU configuration file storage system and a storage method thereof. The anti-SEU configuration file storage system comprises three large-capacity FLASH memories, an anti-fuse FPGA and an FPGA based on an SRAM. A configuration program of an SRAM type FPGA is stored through three large-capacity FLASH memories; each FLASH is used for storing the same program accordingto the same mode; according to a principle that the minority complies with the majority principle, the bits in the three FLASH sheets bit by bit are compared; error bits are corrected, namely respectively reading configuration programs from the same addresses in the three FLASH sheets, then the configuration programs are compared according to bits, if a certain bit in one FLASH sheet is inconsistent with the bits at the same positions in the other two FLASH sheets, a fact that the FLASH sheet has an error is judged, and the bit with the error is corrected; and the anti-fuse FPGA completes reading and anti-SEU correction of configuration programs in the three FLASH chips, and periodically writes part of configuration programs into all configuration programs of the SRAM type FPGA and a dynamic refreshing process at the beginning of power-on. According to the system and the method, the single event upset problem of the configuration program stored in the FLASH can be overcome.

Description

technical field [0001] The invention belongs to the anti-radiation reinforcement technology of an on-board electronic system, and in particular relates to an anti-SEU configuration file storage system and a storage method thereof. Background technique [0002] SRAM-type FPGA has the characteristics of abundant resources, excellent performance and reprogrammability, and is widely used in on-board electronic equipment. The configuration storage area in SRAM-type FPGAs is greatly affected by space radiation, and single event flips are prone to occur in space environments. Therefore, in-orbit applications often use on-orbit systems such as "PROM + antifuse FPGA + triple-mode redundancy + timing refresh". Dynamic refresh technology. Because spaceborne systems generally need to handle a large amount of work, large-scale SRAM-type FPGAs are often used, and the on-orbit dynamic refresh method generally requires the storage of all configuration programs and part of the configuration...

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Problems solved by technology

[0004] The disadvantages of the above method are: (1) This scheme requires the ground system to participate in the anti-SEU, which is not feasible for deep space exploration; (2) For non-synchronous orbit satellites, the ground needs to participate in the anti-SEU, it must be in the The cost of setting up ground stations around the world is high

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