SEU readback interval strategy of SRAM-based FPGA for space application

Readback test is a key method of SRAM-based FPGA for space application, the readback interval which means the time between two readback behavior decides the performance of anti-SEU. According to readback test of XQR2V3000, the interval is about 189 ms under 5 MHz readback clock; the average SEU interval is about 461 min by analyzing the remote measure data of FPGA used in one satellite which has already been serving on the orbit of 1100 kms for about 260 days. The readback interval strategy is researched based on the former results, the normal mode and abnormal mode are stated. The research is useful for SRAM-based FPGA for space application.