你好，我有一个XILINX家的VC707板子，上面的电源控制用的是UCD9248PFC，我用online模式观察到了UCD9248PFC的内部电压设置，然后自己生成了一个文件下载到UCD9248PFC之后，无电压输出，现在插上下载器后，就连UCD9248PFC都识别不到了，现在整个板子都无电压输出，能帮我分析一下可能的原因吗
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