TJA1021 INH

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TJA1021 INH

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Yongdong
Contributor I

      确认下如果TJA1021按参考设计硬件电路上有主节点的电阻,但实际我是用在从节点上,这个会不会有什么影响。 因为从电路上看,LIN两端都有电源上拉的情况下,LIN的线束的阻抗可能就不能忽略了,是否对信号传输有影响呢。  就是按参考设计做,但是是用在从节点上。会有什么影响,因为参考手册上只能用在主节点上。

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TomasVaverka
NXP TechSupport
NXP TechSupport

Hi Yong,

It is not recommended to do so because the Rbus will be affected and the RC time constant will be lower than the Spec value, which will affect the LIN signal quality.

Screenshot 2024-08-16 080606.png

BRs, Tomas

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Yongdong
Contributor I

Hi  Tomas

The master node's resistance and the slave node's resistance exchange   Rbus should be the same.
Rbus=Rmaster||Rslave

 

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