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想用280049的SDFM模块来采样，SD1_C1这个引脚是时钟信号，
请问DSP的这个引脚配置成SDFM后会自动发出时钟信号么？ 还是说要外部给个时钟信号到这个引脚呢？
这个引脚是一个输入引脚，需要外部时钟给信号到这个引脚用以给SDFM模块提供时钟信号
谢谢
