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仿真器连接目标板 JVM terminated

您好,我用seed560 plus仿真器,成长lunch IT debugger ,但是一旦连接目标板就出现JVM terminated 窗口,但是有的时候又能连接上目标板。对于设计的两块一样的板子,只有一块出现这个问题,对比两个板子没有多大差别,唯一区别是上电后两个板子3.3V供电电流不一样的,电流大的那个板子能连接上,但是这个3.3v和DSP的IO上3.3v是两个独立网络。上电后检查DSP的1.2v和3.3V都正常,JTAG接口TRST不接,TMS上拉,EMU0和EMU1上拉.连接目标板虽然JVM terminated,回头测量TMS引脚电平大约在3V左右