VLPR

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VLPR

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LzdOo
Contributor III

使用S32K144的VLPR模式,进入VLPR模式后我关闭了外设电路,但没有对FTM、ADC、CAN等模块进行反初始化,此时电流在3.6mA左右,请问我该进行哪些操作来进一步降低电流至1.5mA?

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907 Views
Senlent
NXP TechSupport
NXP TechSupport

Hi@LzdOo

VLPR在25摄氏度下,所有的外设模块都关闭的情况下,理论的功耗都有1.48mA.

Senlent_1-1754981391123.png

其次,如果CAN ,FTM,或者ADC没关闭,这个功耗是应该超过2mA以上的(没有VLPR下ADC的功耗数据)

Senlent_0-1754980931761.png

 

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905 Views
LzdOo
Contributor III

请问CAN、FTM以及LPUART的关闭是以deinit的形式实现的吗?我用这种方式关闭FTM和LPUART后发现电流与未关闭时区别几乎没有是什么原因?(项目要求VLPR时ADC需要工作)

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897 Views
Senlent
NXP TechSupport
NXP TechSupport

Hi@LzdOo

是的,这种方式可以关闭外设,但是作为CAN或者FTM的输出端口配置也要考虑改变,例如在进入VLPR模式的时候把这些通信的接口设置为模拟输入模式。CAN和FTM在VLPR模式下的功耗本来就很小,几十微安,测试设备精度不高可能会导致你观察不到这种变化。

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917 Views
Senlent
NXP TechSupport
NXP TechSupport
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913 Views
LzdOo
Contributor III

这个文档是看过了的,首先我选用的是VLPR而文档中选用的是VLPS,其次按照文档内容操作寄存器及时钟配置后,对实际电流基本没有影响。

请问还有什么其他途径吗?

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