Supply from VBUS and sleep modes

2024-01-19 20:32

Hi,

My questions concern Luckfox Pico Mini A and B.

Do these boards allow sleep modes (to lower energy consumption) and wake from GPIO ?

Can we supply them directly from VBUS and what are minimum and maximum voltages ?

Is there enough energy we can sink from 3V3 pin to supply small devices (for example low consumption sensors) ?

I would like to supply these boards with Li-ion battery (3.7V) mostly in sleep mode and wake them up externally.

Thanks

2024-01-20 2:21

Temporarily not supporting sleep and wake-up. VBUS is connected to the Type-C interface for input voltage. VSYS is the main system input voltage, which can vary in the range of 4.5V to 5.5V.

2024-06-20 20:56

Hi,
I enabled in the kernel suspend to RAM and I can see that /sys/power files exist now,
but doing

Code: Select all

echo mem | tee /sys/power/state

the board just "halts",
consuming same amount of power as before. So obviously suspend not really supported.

Not sure what needs to be done, to enable suspend/resume, any idea what is needed
or a timeline in case it can be implemented ?

Thanks!