LS1043A can not reboot(watchdog can not stop)

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LS1043A can not reboot(watchdog can not stop)

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Hahawell
Contributor III

More information:

The board works well normally except reboot.

When reboot,RESET_REQ_B can not change status(always Low)

LSDK is 1909

Reset circuit refers to LS1046A FRWY

No CPLD in our board.

微信图片_20210622195735.jpgLS1043A.png

  Thanks!!

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ufedor
NXP Employee
NXP Employee

What is the RCW source?

Ensure that it is capable to properly supply the RCW in case of reboot.

In case of further questions please provide complete processor connection schematics as PDF.

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Hahawell
Contributor III

ufedor

        You can check my schmatic. 

        Thanks!

微信截图1.png微信截图2.png

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Hahawell
Contributor III

I find U44 logic has problem:RESET_REQ_B comes from ls1043a and it is low voltage normally;RESET_SYS comes from the button in the board.

The circuit comes from FRWY ls1046ardb。but why it wokes well??

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ufedor
NXP Employee
NXP Employee

> RESET_REQ_B comes from ls1043a and it is low voltage normally

This is not normal to have RESET_REQ_B low.

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