I have some question related to the BG95-M3 with LGA footprint.
- Is the PWRKEY pin the only way to turn on the modem?
- If I supplying VBAT_BB, what happens next? is the module waiting for a trigger from the PWRKEY pin to activate the internal system processor and the module itself?
- If the PWRKEY pin is the only way to turn on the modem, what kind of circuit to trigger that pin without push button or external MCU by following timing of powering module diagram itself?
- On BG95-M3 Mini PCIe functional diagram, I see there is a circuit that might help answer my question, the block I marked with green on below picture.
Is it the circuit to control the PWRKEY pin?
Thank you, let me know if my question is not clear.