Reflashing the NRU-160-AWP or NRU-170-PPC (JetPack 6.0)

Overview

To reflash the NRU-160-AWP (or NRU-170-PPC) series, you will need to:

• Prepare an x86 host computer with the flashing environment.

• Put the NRU-160-AWP or NRU-170-PPC into recovery mode.

• Connect the x86 host computer and the NRU-160-AWP (or NRU-170-PPC) using a USB Type-A to USB Type-C cable.

• Enter the flash command on the x86 host computer to flash NRU-160-AWP (or NRU-170-PPC)

• Install necessary packages on NRU-160-AWP (or NRU-170-PPC)

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Prepare an x86 Host Computer with the Flashing Environment

• Prepare an x86 host computer with Ubuntu 20.04 installed

• Create a JetPack 6.0.0 Linux_for_Tegra (L4T) environment on your host computer

  • You can create this environment using NVIDIA SDK Manager by selecting Jetson Orin NX and JetPack 6.0.0

  • Alternatively, you can set it up using command lines [link].

• Download the latest NRU-160-AWP tarball from NRU NAS onto your host computer

Please contact your sales representative to obtain the NRU NAS link and password.

Untar the NRU-160-AWP tarball within your JetPack 6.0.0 L4T folder to access all the necessary overlay files for flashing the NRU-50+. For example:

cd Linux_for_Tegra
sudo tar zxvf nru160_170_JP60PROD_ES2_2025-01-23_1528.tar.gz

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Put the NRU-160-AWP or NRU-170-PPC into Recovery Mode

Method A (Recommended for Mass Production version)

• Procedure to Put the NRU-160-AWP (or NRU-170-PPC) into Recovery Mode

  • The IGN mode could be any mode.

  • Unplug the power.

  • Hold down the power button.

  • While holding the power button, reconnect the power.

  • Wait for 1 seconds, then release the power button.

  • After 3 seconds, the NRU-160-AWP (or NRU-170-PPC) will boot into recovery mode.

This method is easier than pressing the recovery button and helps prevent potential system shutdowns due to ignition mode settings.

Method B (Recommended for Early Access version)

Procedure to Put the NRU-160-AWP (or NRU-170-PPC) into Recovery Mode

• The IGN mode must be:

  • Rotary Switch set to mode 0

  • Or, set to mode 0 with the rotary switch set to mode F (the factory default).

• Ensure that the power cable is connected and that the computer is turned off

• While holding the recovery button, press the power button

• Wait for 3 seconds, then release the recovery button

• Then the NRU-160-AWP (or NRU-170-PPC) will boot into recovery mode.

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Connect the x86 host computer and the NRU-160-AWP (or NRU-170-PPC) using a USB Type-A to USB Type-C cable

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Enter the flash command on the x86 host computer to flash NRU-160-AWP (or NRU-170-PPC)

cd Linux_for_Tegra
sudo ./flash_nru160_170_dtb+pinmux.sh

Install necessary package on NRU-160-AWP (or NRU-170-PPC)

#install cuda & acpid
cd /usr/src/nru
sudo ./install.sh

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Troubleshooting

1. Waiting for the target to boot-up ...

There are several reasons might occur this issue:

1. USB cable quality issue

2. Host Firewall settings

1-2. Flash failed due to host firewall settings

If you are facing the following error message:

Or reading the following info in sudo dmesg

Please use the following command to disable Firewall during flash

sudo ufw disable