When does the Orin Nano I/O pins enter POR state?

Autonomous Machines Jetson & Embedded Systems Jetson Orin Nano
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1

Hi,

Each I/O pins on “Jetson Orin NX Series and Orin Nano Series Pinmux Config Template” have column for “POR”, and indicates the state of the pin when power-on reset is initiated. What conditions are considered to be power-on reset that will reset the I/Os into the values mentioned in the pin mux? TRM Section 8.4.2.2 mentions that after cold-boot and warm-boot power cycling will result in pin-states to default to the reset values on the POR column, but are the following cases part of the warm/cold boot?

1.Orin Nano Module power up
2. POWER_EN driven low from carrier board
3. SYS_RESET* driven low from carrier board

3

POR seems the state controlled by the hardware rather than the pinmux configuration.
Please let me check these three cases with internal and update to you.

5

Yes, above operation belong to warm/cold boot.

7

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