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iMX6S watchdog reboot issue

Question asked by Hai Doan on Sep 6, 2017
Latest reply on Sep 7, 2017 by Phuoc Do

Hi All,

We are encountering an intermittent issue with watchdog reboot issue on custom board using iMX6S and PMIC MMPF0100.

Our custom board is designed base on SABRE-SD board, with regards to below reboot circuit.

Found out in some instances, the reboot command could not work due to WDOG_BUF signal could not go down to logic 0, hence no change on PWRON pin. It results as system hang forever after enter reboot command.

We have tried with 1uF or 2.2uF but the issue still can happen. Any advice what to check? Thanks.

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