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MMWCAS-DSP-EVM: S1开关不能turn on/off

Part Number: MMWCAS-DSP-EVM

新的板子,我在做SSD卡格式化的时候, Reboot the TDA2 Host board by pressing the S1 switch. 在这步按S1开关无任何反应,串口工具里面没看到任何reboot发生,请问这是硬件有问题还是其他原因。