After powered up ,the IMX8Q's BB50 (SCU_WDOG_OUT) ouput like that ,cann't detect usb ,and I tie this pin to WDI belonged to pmic ,and this waveform make PMIC reset at 3,243Hz,can anyone know how to solve this problem ,thx a lot
For your reference : SCFW: Enable PMIC external watchdog for iMX8QXP MEK
In default SCFW, it had already used internel watchdog to make sure SCFW is always running, if SCFW is built as no debug version (M=0 D=0), all SCFW halt will cause SOC reset. And if hardware had connected the SCU_WDOG_OUT pin from iMX8QXP to PMIC's WDI pin, then during SOC reset, the PMIC will also do hard reset to make a POR reboot for the whole system.”
think u ,but the first time to supply power for IMX8,even never detect HID ,none enable internel watchdog,how can I disable the watchdog?
Do you mean your board cannot go to the USB download mode?
yes,first time to power up
cann't detect USB HID,cann't goto download mode
two pgoods from PMICs are high ,but no voltage CPU0 CPU1 GPU0 GPU1
What is the boot mode pin setting on your board?
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