Default condition of SCU_WDOG_OUT pin

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Default condition of SCU_WDOG_OUT pin

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Senior Contributor I

Let me confirm deafult condition of SCU_WDOG_OUT pin.

Datasheet mentioned SCU_WDOG_OUT pin is configured WDOG_OUT function and 50k PullDown.

But, reference manual mentioned SCU_WDOG_OUT pin is configured JTAG_TRST function and bus-keeper.

Which information is correct?

From IMX8DXAEC Rev. 2, 11/2019

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From IMX8DQXPRM Rev. E, 06/2019

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Best Regards,

Kazuma Sasaki.

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NXP TechSupport
NXP TechSupport

I got suggestion as below:

 JTAG_TRST_B function was removed, it was replaced as SCU_WDOG_OUT. Do not pull-up this pin to SCU_1V8. Suggest add one pull-down resistor on this pin.

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Contributor I

Hello ,bro,I met one problem with SCU_WDOG_OUT,when powerd up, SCU_WDOG_OUT output an waveform like below,did u ever solve this kind of things? thx a lot

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NXP TechSupport
NXP TechSupport

I got suggestion as below:

 JTAG_TRST_B function was removed, it was replaced as SCU_WDOG_OUT. Do not pull-up this pin to SCU_1V8. Suggest add one pull-down resistor on this pin.

View solution in original post

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Senior Contributor I

Dear Joan,

I appreciate your support.

I understand that the contents of datasheet are correct and reference  manual will be revised in the near future.

Best Regards,

Kazuma Sasaki.

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