Custom Carrier board Reboot issue for Jetson Xavier NX

[nikunj.mehta]

Hi Team,
I have Jetson Nano and Jetson Xavier NX Custom Carrier board ,
we able to boot successfully boot in NaNo SOM module ,
but at the time of NX SOM booting it continuously reboot it self.
can any one guide me on that .
attaching logs with and without SD card inserted on Xavier NX SOM module .
JetCarrier_log_02 (2.0 MB)
JetCarrier_log_SD_Remove (159.9 KB)

[JerryChang]

hello nikunj.mehta,

what’s the release image version you’ve flash to the SD card. are you sharing the same carrier board with Nano and NX?

[nikunj.mehta]

Hi Jerry

We have Same Carrier Board for Nano and Nx SOM module

Nx SOM image -
JETSON XAVIER NX DEVELOPER KIT

Nano SOM image -
For Jetson Nano Developer Kit:- “https://developer.nvidia.com/jetson-nano-sd-card-image”

[WayneWWW]

@JerryChang

This thread has another duplciated post here. I see no difference between these two. Should check from hardware design first.

NVIDIA Jetson Xavier NX Booting issue on Custom Carrier Board

Hi folks , I am trying to compare my booting logs with devkit booting logs. Below are the logs point which i am not getting in my Jetson Xavier NX Custom board booting process in CPU-BL Params @ 0xf2820000 below 2 base address not configured in my booting process → Base:0xf2000000 Size:0x00200000 → Base:0xf1200000 Size:0x00200000 (this things observe 2-3 times then in 4th continuous auto reboot it will come proper ([0000.996] I> Cboot Version: t194-9efcbc4f [0000.998] I> CPU-BL Params…

[nikunj.mehta]

Hi Jerry

yes it is same .
but i need further Hardware assistance so this new thread created.

can any one help me to figure out in which section of hardware interface i have to look and made some correction ,
I compare custom carrier board design with Devkit design it looks similar only difference was we have some extra I2C device in our design .

[WayneWWW]

Did you read the design guide document or not?

[nikunj.mehta]

are you talking about “Jetson_Xavier_NX_Product_Design_Guide_DG-09693-001_v1.3” this document ?

[WayneWWW]

The lastest version should be 1.5.

Jetson Download Center

[nikunj.mehta]

Let me refer latest one . Thank you for the information .

[nikunj.mehta]

Hi Wayne,

I referred design guide . but seems like we follow all details ,
one thing I observer related to “POWER_EN” signal observing POWER_EN low pulse repetitively and that will sink with Reboot sequence .

[nikunj.mehta]

also observing 5V supply drop at the time of Low pulse on POWER_EN .

[Trumany]

There is no 5V drop in your waveform. POWER_EN is an input to module, it should not have a drop during power on.
Please compare your design to P3509 schematic first.

[nikunj.mehta]

thank you for your feedback ,

we disconnect POWER_EN signal connection from MCU and provide Hardware High signal with RC delay . and now NX boot successfully . i think that low pulse give by MCU logic .

[Trumany]

So you mean it works well after correct your MCU action?

[nikunj.mehta]

Yes .