FS32K116LAT0MLFT芯片PTD3管脚咨询

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FS32K116LAT0MLFT芯片PTD3管脚咨询

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Luxiaolu
Contributor I
使用FS32K116LAT0MLFT芯片PTD3管脚接RTC芯片的INT脚,板卡不上电,
RTC电池3.3V(网络VCC_RTC)会从PTD3管脚漏电到FS32K116LAT0MLFT芯片的供电管脚VDD(网络MCU_3V3)有0.8V,为什么?
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Senlent
NXP TechSupport
NXP TechSupport
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Senlent
NXP TechSupport
NXP TechSupport

Hi@Luxiaolu

这个状况是对的,并且是不允许的,MCU断电后也要确保外部关键没有电压输入.

你应该把RTC_INT的上拉电压源选择为MCU_3V3. 

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Luxiaolu
Contributor I

您好!

MCU断电后也要确保外部关键没有电压输入,如果外部有漏电过来是否也会对MCU造成有误动作或损坏可能?

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174 Views
Senlent
NXP TechSupport
NXP TechSupport

Hi@Luxiaolu

对的

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