The FPGA-based eMMC Memory System Design for Satellite Payload

China Space X-Ray Polarization Detection System(CXPD) is dedicated to detecting space X-ray polarization, energy spectrum and other information for understanding astrophysical phenomena. In order to meet the storage requirements of small satellite payloads with strong security, low power consumption and low cost, this paper selects embedded multimedia memory cards with functions of error checking and correction, power-down saving and bad block management as storage media. For the power-up operation of satellite payloads in the special environment of space and the data throughput requirements of satellite payload devices, combined with the eMMC5.0 protocol, this paper studies an on-satellite storage system based on field-programmable gate array(FPGA) control. The system can operate stably in high and low temperature test tests, vibration tests and long time alpha source irradiation tests.