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Hi,
In our system, the POR_B must can be at low level (to stay in the reset state) a very long time (many days) after power up. Just after power up, the last state of the pins is unknown; For the pins which have the "Input Keeper" value mentionned in their "Default setting on Reset" in the datasheet (like for GPIO_EMC_00), what will be the state of these pins during the reset state:
A randomly logical value (Vss or Vdd) or a floating state?
Hello @Olivier3 ,
GPIO pins with keepers will be either in a high or low state depending on the previous state before going to reset but not floating.
You can check the following links for further information:
i.MX RT1020 GPIO Default Setting - NXP Community
System Controller Firmware 101 - Pad configuration service - NXP Community
BR,
IsaulO.