i.MX8M Mini loses power while downloading image

[937556508]

Hi,

We use the chip MIMX8MM5DVTLZAA to carry the circuit, and we refer to the 8MMINILPD4-EVK development board design. We use PMICBD71847AMWV to supply power according to the power supply scheme of the development board, but when MIMX8MM5DVTLZAA downloads image, MIMX8MM5DVTLZAA will pull down the signal WDOG_B, which causes the PMIC to repeatedly power on and off. can you help me .

[igorpadykov]

Hi 937556508

one can try to tweak wdog settings, for example disable it in

Serial Downloader mode as described in sect.6.1.2.4 Serial Downloader

i.MX 8M Mini Applications Processor Reference Manual

or if it is enabled later to increase its timeout value.

Best regards
igor

[937556508]

Hi igor,

Thank you for the reply.

WDOG_B keeps restarting PMIC is the phenomenon of my current USB download. I tried to disconnect the WDOG_B signal, but the CPU still cannot download the image successfully, or the image cannot be executed successfully. I tried to check the error message through the serial port, and found that the CPU was always executing The status of repeat downloading. Can you give me some help.

Best regards