iMX8MN Power-On Sequence issue

[justin_hsieh]

Hi Team,

Regarding the iMX8MN specifications, only typical and maximum values are provided, but there is no minimum value given.

justin_hsieh_3-1736301936490.png

justin_hsieh_2-1736301882596.png

Our PA team believes that a minimum value should be a positive number even if not specified in the specifications.

The measurement result in our device is -9.54ms, and we have verified the timing on the iMX8MNANOD3L EVK, obtaining a similar value.

Can we bypass this issue?

Our device

justin_hsieh_1-1736301839692.png

iMX8MNANOD3L EVK

justin_hsieh_0-1736301800254.png

Please advise.

[Rita_Wang · Accepted solution]

The minimum value for T3 is not defined means 32K_RTC_XTALI can be earlier than RTC_RESET_B. The test result is just fine.

[Rita_Wang]

I am help confirm it, when I finshed it I will share to you as soon as possible.