IMX8X POR_N management

[vincent_massonn]

Hello,

I wanted to know if it was possible to make an assertion of the Power on reset of the IMX8X apart from the PMIC PF8100 / PF8200 (via a parallel secondary circuit).
Moreover in case of Power on reset on the IMX8X, the output SCU_WDOG_OUTSCU_WDOG_OUT is not asserted?

Thank you.
Best Regards Vincent Massonneau.

[igorpadykov · Accepted solution]

Hi vincent_massonn

>I wanted to know if it was possible to make an assertion of the Power on reset of the
>IMX8X apart from the PMIC PF8100 / PF8200 (via a parallel secondary circuit).

in general yes, one can use some gpio for controlling such external circut.

>Moreover in case of Power on reset on the IMX8X, the output
>SCU_WDOG_OUTSCU_WDOG_OUT is not asserted?

it depends on reset type, for case "partition" reset it is not asserted as described on below

https://community.nxp.com/t5/i-MX-Processors/Watchdog-AP-cores-on-imx8QM-MEK/m-p/1153684

Types of reset are described in sect.13.7 TIMER: Timer Service sc_fw_api_qx_b0.pdf

included in SCFW Porting Kit​

Best regards
igor