Tool/software: Linux
Hardware: AM335x Starter Kit
Software: Processor SDK Linux 3.03
I'm using the command "shutdown -hP now" to power off the Starter Kit. I can see pretty much all the rails remain up after power off. I measured the rails with a DMM, but this can be easily observed if you have an ethernet cable plugged in.
Procedure to reproduce:
- Start with a fully unpowered board (i.e. not plugged into DC power).
- Plug in the power (though do not yet press the power button) and connect Ethernet. Notice there are not lights on the Ethernet.
- Press the power-on button.
- Shutdown the board using "shutdown -hP now".
At this point you'll notice that the Ethernet lights are on (i.e. because everything is powered up). You can also probe various caps and see that the PMIC rails are all up.
Why doesn't the board shutdown properly?
