User's Guide

MM6108-MF08251 User Guide UG100
IEEE 802.11ah Sub-1G Wi-Fi HaLow Module
Page 11/19
3.4. Power Management
Module power is derived from a 1.8 to 3.6V supply provided on pin VBAT. A 3.3V supply is
provided on pin VDD_FEM to power the on-board ultra-long-range PA.
VDDIO sets the IO voltage of the MM6108 and should be connected to the same power
supply as the host MCU.
3.5. Digital Interfaces
All unused digital IO pins must be pulled up or down to ensure they do not float. Failure to do
so, will result in a higher leakage current on the VDDIO supply.
Please refer to the MM6108 chip datasheets for a description of the supported peripheral
interfaces.