AGX ORIN MCU behavior questions

Autonomous Machines Jetson & Embedded Systems Jetson AGX Orin
1

We use the same MCU EFM8SB10F2G as Jetson Orin Developer Kit Carrier Board and design on our boards.

Without installing AGX ORIN module and not pressing PWRBTN or enabling AUTO POWER ON function, we measure the waveform to see the MCU P1.3 (VIN_PWR_ON) behavior as following picture.

Is it correct and expected behavior for VIN_PWR_ON since there is no event happening from P0.0(PWRBTN#) & P0.6(BMCU_ACOK_OR)?

sch for NV003-WT
sch for NV003-WT831×442 76.9 KB

Waveform for NV003-WT
Waveform for NV003-WT862×532 44.1 KB

4

Please do this kind of test with module and compare to the timing waveform of dev kit, and also you can refer to the sequence in Orin Design Guide doc for correct timing.

5

I have measured the waveform of devkit and didn’t observe the same behavior.
Could we know the MCU behavior for VIN_PWR_ON?
Iin order to further debug, which signal make the trigger for VIN_PWR_ON?