专家好！
以前用MSP430F4152的ADC测试电池电压很简单，只需要开通对应通道，内部有一个二分之一的分压，开通内部参考基准电压源即可测试，但现在使用FR4133却没有这个通道，请问专家怎么实现测试电池电压（DVCC）？谢谢！
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