Hi,
from the design, MV(5V) need to be powered up first, then HV(12V) followed. But on our board, 5V is derived from 12V, so 12V will be powered first, then 5V. Initial test shows the board is booting up OK.
My question is, 12V first or 5V first is critical? Do we must folllow the >1ms rule in design guide？
Thanks
Peter
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Based on the provided context, I will address your question regarding the power-up sequence of the Jetson AGX Orin module.
According to the context, the Jetson Orin NX Series and Jetson Orin Nano Series modules have specific power sequencing requirements. The recommended power-up sequence is to power up the 5V supply (VDD_5V_SYS) first, followed by the 12V supply (VDD_HV). This is mentioned in the context as “MV5V need to be powered up first then HV12V”.
However, in your specific design, the 5V supply is derived from the 12V supply, which means that the 12V supply will be powered up first, followed by the 5V supply. You have performed initial tests, and the board is booting up okay.
The critical question is whether the 12V-first or 5V-first power-up sequence is critical, and if the 1ms rule in the design guide must be followed.
Based on the context, it appears that the power sequencing requirements are specific to the Jetson Orin NX Series and Jetson Orin Nano Series modules. The design guide likely provides guidelines for ensuring reliable power-up and operation of the module.
While the context does not explicitly state the consequences of not following the recommended power-up sequence, it is likely that deviating from the recommended sequence could potentially cause issues with the module’s operation, such as power-on resets, instability, or even damage to the module.
Regarding the 1ms rule, it is likely that this rule is related to the power sequencing requirements, possibly specifying a minimum time delay between powering up the 5V and 12V supplies. However, without more information, it is difficult to provide a definitive answer.
In summary, while your initial tests show that the board is booting up okay with the 12V-first power-up sequence, it is recommended to follow the recommended power-up sequence specified in the design guide to ensure reliable operation of the Jetson AGX Orin module. If possible, it would be best to consult the design guide and NVIDIA documentation for more specific information on the power sequencing requirements and the 1ms rule.
Comparison with other platforms:
In conclusion, while the 12V-first power-up sequence may work in your specific design, it is recommended to follow the recommended power-up sequence specified in the design guide to ensure reliable operation of the Jetson AGX Orin module.
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sorry, it’s no use.
