RT1061和LPC4357的I2C程序在群脉冲干扰下表现不同

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RT1061和LPC4357的I2C程序在群脉冲干扰下表现不同

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KELE
Contributor I

你好,我们目前有一款产品有两个型号,分别用了贵司的LPC4357芯片和RT1061芯片作为主控MCU,这两款产品在I2C上的抗干扰能力实测下来相差较大。

LPC4357驱动的I2C总线在群脉冲干扰下,丢包和错误的情况都较少;但是RT1061驱动的I2C总线出现了大量的丢包和错误,请问RT1061的I2C如何去规避这些问题?(硬件几乎一样,只有主控MCU不一样)

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Kan_Li
NXP TechSupport
NXP TechSupport

Hi @KELE ,

 

我们提供了一篇针对RT系列EMC的设计手册,具体请参考https://www.nxp.com.cn/docs/en/application-note/AN13202.pdf 。

 

Have a great day,
Kan


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KELE
Contributor I

RT1061的I2C抗干扰问题在产品上出现问题持续了一年多时间,并且情况仍在发生,具体现象是在干扰强烈的情况下,I2C有可能会一直进入到中断导致触发看门狗并重启芯片,目前我们用的芯片包驱动版本为12.0.0,今天看到了贵司19.0.0的驱动包里fsl_lpi2c.c文件中修改了大量内容,特别是

LPI2C_RunTransferStateMachine()函数,我想请问一下贵司升级该部分驱动有没有修改记录或者说该部分的改动是不是为了修复哪些问题?
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