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CCS3.3 连接仿真器时,总显示重置状态,DSP的的复位电路总为低电平,什么原因?



板子上有DSP芯片和CPLD,各用个的JTAG下载口,刚开始DSP和目标板连接正确,我拔掉后,给CPLD写了一个程序,然后拔掉CPLD的下载线,重新连接DSP的仿真器时,点击connect 时,显示连接错误,目标在重置,我测量一下复位电路,其输出为电平,所以显示复位,这是怎么回事??

说明CPLD和DSP共用一个复位电路,上一次连接还可以正常用