User Guide

18／35
52 3.3Vaux VBAT PI Power Input
Note
1
Besides USIM interfaces, the voltage domain of other digital interfaces is 1.8V, and the
USIM interface is available with 1.8V and 3.0V.
2. Please suspend all of NC, RESERVED and unused pins.
3. “*” indicates the audio feature is not available and reserved function.
3.2.2 Pin Assignment
The following figure shows the pin assignment of the M3B module, and the top face is for sticking
antenna connector and opposite face is the BOT.
Figure 2 Pin Assignment (Top View)
uCloudlink M3B Mini PCIe-C _Hardware Design Guide_V1.0