Hi,
I am working on getting the Orin NX to boot in a -40 C environment. I know that the NX is rated only down to -25 C, so I am exploring what can be done to ensure operation. As a part of testing, I wanted to modify the min_chip_limit value for boot, but changing the value to be less than -28C in MB1 BCT causes an issue with flashing. Is it possible to lower this value any further?
Thank you.
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To address your question about modifying the minchiplimit value for the Jetson Orin NX to enable booting in a 40°C environment, we need to consider the thermal limitations and specifications of the Jetson Orin NX platform.
Firstly, it’s crucial to understand that the Jetson Orin NX is rated to operate down to 0°C, but the specific temperature range you’re aiming for, 40°C, is within the operational range but you’re trying to adjust settings for lower temperatures. The minchiplimit value in the Boot Configuration Table (BCT) is a parameter that affects the boot process, particularly in relation to the chip’s temperature limits.
The issue you’re encountering, where changing the minchiplimit value to less than 28°C in MB1 BCT causes problems with flashing, suggests that there are specific constraints or checks in place during the boot or flashing process that prevent arbitrary changes to these critical parameters. These constraints are likely in place to ensure the reliability and integrity of the boot process and to prevent potential damage to the hardware by operating outside specified temperature ranges.
Given the context, it seems challenging to lower the minchiplimit value further than what is currently allowed by the default settings or through standard configuration methods. The limitations you’re hitting are likely by design, to protect the hardware and ensure that the system operates within safe parameters.
However, there are a few potential avenues you could explore, though they might require significant technical expertise and could potentially void warranties or cause system instability:
Custom Bootloader Modifications: If you have access to the source code of the bootloader and the necessary expertise, you might be able to modify the bootloader to accept lower minchiplimit values. This approach requires a deep understanding of the bootloader’s functionality and the potential risks of modifying such critical system software.
Kernel or Device Tree Modifications: Depending on how the temperature limits are enforced at the operating system level, you might be able to adjust these limits by modifying the Linux kernel or the device tree files. This could involve changing parameters that control thermal thresholds, but again, this requires significant technical knowledge and could lead to system instability or hardware damage if not done correctly.
Cooling Solutions: Instead of trying to modify the software limits, you could explore improving the cooling of the Jetson Orin NX module. Effective cooling solutions could potentially allow the module to operate reliably at higher ambient temperatures by keeping the chip temperature within safe limits.
Contact NVIDIA Support: If you’re working on a project that requires operation outside the standard specifications, it might be worth contacting NVIDIA’s support teams. They could provide guidance on whether there are any officially supported methods for adjusting these parameters or if there are specific development kits or versions of the hardware that are more suited to your needs.
In summary, while there are potential technical avenues to explore, they come with significant risks and uncertainties. The safest and most reliable approach would be to operate within the specified temperature range or to explore cooling solutions that can keep the module within a safe temperature range during operation.
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The issue is with temperatures below negative 28 C, not positive.
No, not possible to adjust that. Please just follow the spec.