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The LaunchPad is designed to be powered from a USB-compliant power source, either a USB charger or a computer. When used this way, jumpers need to be mounted on the 3V3 position of the central jumper block. An LDO powered from the USB VBUS supply supplies 3.3V to the XDS debugger, the CC2640R2, and associated circuitry including the 3V3-marked pins for BoosterPacks.
您现在是想要使用EnergyTrace来测试电流？若是这样的话，您的板子必须有XDS110来供电（The XDS110 debug probe must supply power to the target for measuring energy.）关于连接您可以看一下 2.4 Auxiliary Debug Interface
