基于FPGA的星上eMMC存储系统

The FPGA-based eMMC Memory System Design for Satellite Payload

X射线偏振探测立方星载荷(China Space X-Ray Polarization Detection System,CXPD)致力于检测空间X射线偏振度、能谱等信息,用于理解天体物理现象。为满足安全性强、功耗低、成本低的小型卫星载荷存储需求,本工作选择具有错误检查和纠正、掉电保存、坏块管理等功能的内嵌式多媒体存储卡作为存储介质。针对卫星载荷在太空特殊环境下的上电操作和星载设备的数据吞吐量需求,结合eMMC5.0协议,研究了基于现场可编程门阵列(FPGA)控制的星上存储系统。该系统在高低温试验测试、振动测试和长时间alpha源照射测试中均能稳定运行。

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.