Power sequence and timing for SYS_HV and SYS_MV

Hi Nvidia forum,

I’am currently working on custom board with 3 Xavier AGX modules.
I’ve read the OEM Design guide document but can’t find the information about timing between SYS_VIN_HV and SYS_VIN_MV.

I want to know what will happen if I provide SYS_VIN_HV at power On of the board (without power button) and then provide SYS_VIN_MV (maybe some secondes after)?

Thanks for any answers.

There is no strict timing request between HV and MV, it is possible to have seconds delay. The key points of power on sequence is to let vin_pwr_bad rise after power supply (HV and MV) is stable and then enable module_power_on and then is carrier_power_on.


What about If the +3V3 and 1V8 of the carrier board are already ON before SYS_HV or SYS_MV rise.
How mandatory is the power discharge circuitry ?


Carrier board power rails must be ON later than module.