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Fuse Operations#

Burn Fuses with the Fuse Configuration file#

After the Fuse Configuration file is prepared, you can burn fuses using odmfuse.sh (-X option) script with the Fuse Configuration file:

sudo ./odmfuse.sh -X <fuse_config> -i <chip_id> <target_config>

If a Jetson board was previously burned with a PKC key <pkc.pem>, and the board needs to have additional fuses burned, run the following odmfuse.sh command with -k option:

sudo ./odmfuse.sh -X <fuse_config> -i 0x23 -k <pkc.pem> <target_config>

Where:

  • <fuse_config> is the fuse configuration XML file.

  • <pkc.pem> is the PKC key pair (.pem file) that was fused to the board before.

  • <target_config> is the name of the configuration for your Jetson device and carrier board; see the table in Jetson Modules and Configurations.

Note

Fuse burning operations are high-risk because they cannot be reversed. NVIDIA strongly recommends that you use the --test option to verify fuse burning operations before you perform them.

When you add --test to an odmfuse.sh command, the command performs pre-burn processing and verification, but it does not actually burn the fuse. If the command reports the results you want, you can re-enter the command without --test and burn the fuse with greater confidence that you are doing it correctly.

NVIDIA recommends burning all the fuses you need in a single operation. While partial fuse burning is possible if SecurityMode is not burned, it may lead to issues not described in this document. If you are determined to proceed with partial fuse burning, contact NVIDIA technical support for further assistance.

Caution

odmfuse.sh applies to the Jetson AGX Orin series only. For the Jetson AGX Thor series, use fskp_fuseburn.py to burn fuses.

Read Fuses through the Linux kernel#

To read the fuse values through the Linux kernel, run the /usr/sbin/nv_fuse_read.sh script.

To display the script usage, run the following command:

sudo nv_fuse_read.sh -h

To list the supported fuses in this script, run the following command:

sudo nv_fuse_read.sh -l

To read the value of a fuse, run the following command:

sudo nv_fuse_read.sh <fuse name>

For example, the following command gets the value of the BootSecurityInfo fuse:

sudo nv_fuse_read.sh boot_security_info

To read all fuse values, run the following command:

sudo nv_fuse_read.sh