Reliable boot up on supplying power

Objective:
Need to ensure that the Jetson TX1 is turning on automatically reliably when we provide it 19 V power.

Current Setup:

  • Hardware -> Jetson TX1, which is powered on by shorting the power pins emulating a button press. The pins that we short is given below
  • https://slack-files.com/T06UBFMJP-F1LAMEU0P-2a1da79df7 is the image that shows how we short the power pins and which pins we use across our led.
  • The pins are connected across a button, which we press when we want the jetson to turn on. Ideally we would want the jetson to turn on when power is provided, but were not able to do that. hence the button.
  • The jetson is enclosed inside of a box with other electronic components
  • we have also added an led to give a hardware level feedback that the jetson has turned on. The led was connected to the pins in the picture above
  • We use jetpack l4t version 2.2 on our jetson boards.

Observations:

  • The jetson does not reliably turn on when we provide clean power (adaptor given with dev kit, and press the power button on the jetson itself
  • The power to the jetson is not very regulated. other components in the system sometimes send a voltage across the jetson for a very very short amount of time before jetson itself is turned on.
  • When the power is turned on, the voltage is consistent and the jetson does not turn off
  • Sometimes, the jetson turns on for a short duration and then powers off. The time is usually 5 seconds or about 16-19 seconds.

Hi vamshikonduri,

There is a auto-power-on related section in chapter 3.8 of OEM design guide, some rework are needed.
http://developer.nvidia.com/embedded/dlc/jetson-tx1-oem-product-design-guide

Also there is a power up sequence needed as mentioned in chapter 3.4 (Figure 4), you can check the same signals on your board to see if they follow this sequence.

And about your observations, i have several questions:

The jetson does not reliably turn on when we provide clean power (adaptor given with dev kit, and press the power button on the jetson itself
Q: Can you check how about double or multi pressing power button?

The power to the jetson is not very regulated. other components in the system sometimes send a voltage across the jetson for a very very short amount of time before jetson itself is turned on.
Q: What the “other components” means? Are they not on the Jetson?