Auto power on in Bootloader or PMIC?

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX1
1

Hello,

We went to modify the power sequence which the system could power on automatically after the AC adapter was plugged in.

Currently, the system will monitor the POWER_BTN(power button) pin, after this button was press and release, the CARRIER_PWR_ON pin will be pulled high, so the system begins the booting action.

We assume that the both actions to monitor POWER_BTN pin and pull high the CARRIER_PWR_ON pin are both in bootloader, so we went to know is it possible to modify the bootloader to pull high the CARRIER_PWR_ON pin after AC adapter was plugged in maybe 500ms(??), not depend on POWER_BTN pin.

We have already referred some articles as below, because of some hardware concern, we went to try other solution.

Is it possible to be accomplished from bootloader?

Power-on Autostarth->ttps://devtalk.nvidia.com/default/topic/924300/jetson-tx1/power-on-autostart/

Jetson TX1 doesn’t want to boot up without pressing the power button ->[url]https://devtalk.nvidia.com/default/topic/938997/jetson-tx1/jetson-tx1-doesn-t-want-to-boot-up-without-pressing-the-power-button/[/url]

Thanks

2

I’m afraid your plan can’t work logically, as bootloader won’t run before power on. And CARRIER_PWR_ON is a hardware logic signal which is not in bootloader.

3

Hi Trumany,

Thanks for your reply.
The latest question to confirm, Is the hardware logic signal you mentioned is so-called the PMIC.

Thanks

4

CARRIER_PWR_ON is controlled by some hardware components and is related to module power-on process (managed by PMIC).

5

Hi Trumany,

Thanks very much.