基于TSC695F处理器的星载计算机CPU异常复位问题研究

Research on Abnormal Reset of on-board Computer CPUBased on TSC695F Processor

针对基于TSC695F处理器的星载计算机模拟在轨飞行测试中CPU板异常复位问题进行研究;通过使用逻辑分析仪捕捉过程数据,定位问题发生部位,发现导致星载计算机复位的根本原因是数据装载出错;结合芯片驱动能力限度参数分析,发现CPU板实际驱动负载的数量是决定TSC695F处理器是否复位的重要因素,负载一旦超过芯片驱动能力上限,即会容易造成数据装载出错,从而造成复位发生;最后通过仿真和实验验证了理论分析的正确性,并提出了改进方案。

The problem of abnormal reset of CPU board in on-orbit flight test based on TSC695F processor was studied.By using the logic analyzer to capture process data and locate the problem location,found that the root cause of the on-board computer reset is the data loading error.Combined with the chip drive capability limit parameter analysis,it was found that the actual driving load of the CPU board is an important factor determining whether the TSC695F processor reset.Once the load exceeded the upper limit of the chip driving capability,the data loading error would easily occur,which could result in a reset.Finally,the correctness of theoretical analysis was verified by simulation and experiment,and an improved scheme was proposed.