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请问BT-MSPAUDSOURCE Tools Bluetooth and MSP430 Audio开发板(MSP430F5229)的供电装置

大家好:

    我们购买了BT-MSPAUDSOURCE Tools Bluetooth and MSP430 Audio开发板(MSP430F5229), 

     请问它的供电装置是USB口吗?是5V, 还是3.3V?