Astronavigation FPGA universal refresh circuit based on SELECTMAP and achieving method thereof

• Main Authors: LIN YANJUN, SHANG ZUBIN, ZHENG XIANJIAN, WEN ZHIPING, ZHAO YUANFU, FENG CHANGLEI, ZHANG FAN, CHEN LEI, WANG LANSHI, WANG SHUO, LI XUEWU, ZHANG YANLONG, SUN HUABO
• Format: Patent
• Language: Chinese; English
• Published: 04.06.2014
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; PULSE TECHNIQUE

The invention relates to an astronavigation FPGA universal refresh circuit based on SELECTMAP. The refresh circuit is provided with six input pins, six output pins and eight double-direction pins, and the input pins, the output pins and the double-direction pins are connected with pins of a PROM and pins of an FPGA. The SRAM-type FPGA is subjected to backward reading operation through SELECTMAP, the type of the FPGA is determined, and backward read data are checked; if errors happen, a code stream is read from a correct data source, effective parts are intercepted from the code stream, the effective code stream is written into an inner configuration bit of the FPGA again through SELECTMAP, and accordingly refreshing of a configuration memory is completed. Through the refresh circuit, single event upset of the astronavigation FPGA can be timely detected and corrected, functional faults caused by single event upset of the astronavigation FPGA are eliminated, and astronavigation FPGA space application reliabilit