nRF93M1 is powered from a single external supply. An integrated power management unit (PMU) generates the rails required by internal domains, SIM interface, and I/O.
The host PCB provides a single power supply for the VDD pins and ties all GND pins to the system ground. Recommended decoupling and PCB layout are described in the Hardware Design Guidelines.
| Pin | Direction | Description |
|---|---|---|
| VDD | Input | Module supply. 3.3 V to 4.5 V, 3.8 V typical. See Recommended Operating Conditions for more information. |
| LDO_OUT | Output | Internal LDO output available to the host, nominal 1.8 V, up to 120 mA. Also supplies the module's digital I/O pins internally. |
| SIM1_VOUT, SIM2_VOUT | Output | SIM-card supply, switched 1.8 V or 3.0 V depending on the inserted UICC class. |
After VDD is applied, the module remains in System Disabled until the POWERKEY pin is asserted. The POWERKEY pin puts the module into System ON and back into System Disabled.