Nvidia Jetson TX2 Manual page 20

NVIDIA Jetson TX2/TX2i OEM Product Design Guide
3.8.2 Jetson TX2i Auto-Power-On Details
Jetson TX2i uses a different PMIC than Jetson TX2. The TX2i PMIC has a level sensitive on input, so in order to pow er
automatically w hen the main pow er is applied (Auto-Pow er-On), all that is required is for the POWER_BTN# pin to be pulled up.
Since this pin is pulled up on the module, it can be left unconnected for Auto-Pow er-On to be supported.
JETSON TX2/TX2i OEM PRODUCT | DESIGN GUIDE | 20180618 20