Powering Jetson nano module

i have a question about powering nano module. my idea is to make a simple carrier board.
the board will powered by 5V 4A Buck converter, can i connect directly POWER_EN pin to 5V from Buck, POWER_EN need to be to GND before power up?

What about other power pins, should i connect them to GND/5V or keep them not connected?



Please refer to the design guide. unused pins can be left unconnected.
The power of interfaces are designed on module, Don’t need care about it.
POWER_EN, SYS_RESET*, FORCE_RECOVERY* and USB0 are need for a minimal system.
POWER_EN is for module on/off: high level on , low level off. it is not need GND before power up.