BG95 Automatic Power On

IoT Modules LPWA Module
2

Hi,

  1. PWRKEY pin is the only way to turn on the module. You can also use RESET pin if you want. Those two pins are connected inside the module.

  2. If VBAT_BB is applied, the module would wait for the PWRKEY to be grounded to initiate the power-on sequence from the master PMIC device.

  3. The automatic power-on circuit is used to turn on the module. Yes, it is the one in question4. The PWRKEY is connected to the collector terminal of a BJT and VBAT_BB is connected to the base terminal through capacitors. When we supply VBAT_BB, the PWRKEY is high at first, and then transition from high to low. Then the module is turned on automatically.

I hope these help.