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FR5969中ADC12的1/2AVCC是如何实现的



RT,手册截图如下,ADC12BATMAP寄存器置1时是1/2AVCC,这个1/2芯片内部是如何实现的?是电阻分压吗?那电阻的值是多少?这些数据应该在哪找在哪个手册找?