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F2812复位问题

F2812和FPGA通过数据和地址总线进行数据传输,当DSP读取数据总线数据的时候,DSP的XRS复位脚拉低,持续25ms,导致复位,是什么原因导致的呢?XRS脚经过一个100K电阻上拉到3.3V,检测3.3V电源也没有拉低,看门狗没有启用;请各位大侠们帮忙分析一下,比较着急,谢谢啦