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LPC802问题

‎05-25-2020 07:17 PM
965 Views
haifeng_jin
Contributor III

LPC802可以内部采样电源电压吗，或者ADC的参考电压

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‎05-25-2020 10:40 PM
926 Views
xiangjun_rong
NXP TechSupport
NXP TechSupport

Hi, HaiFeng,

就如下图， LPC802所有ADC 通道ADC_0~ADC_11都连接到外部管脚， 它不可以采样内部电源电压。 当然可以连接Vrefp 脚到某个ADC通道，测量Vrefp管脚的电压，测量电压的采样值肯定是0xFFF， 这没有意义。

BR

XiangJun Rong

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