User Guide

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2.4 Function Overview
Figure 1 shows the functional diagram of the M3Bmodule. The major functions are following:
 Support line 1 of USIM card interface
 Support line 1 of USIM 2.0 interface
 Support line 1 of UART interface
 Support LED status indication
 Support RF shut-down feature
 Support external reset feature
 Support 2 RF antenna interfaces
Figure 1 Functional Diagram
uCloudlink M3B Mini PCIe-C _Hardware Design Guide_V1.0
AUDIO*
Mini PCI Express
Interface
USB
W_DISABLE#
PERST#
LED_WWAN#
Main
Antenna
Interface
VCC
Main
Antenna
VBAT
Diversity
Antenna
Interface
Diversity
Antenna
WAKEUP_OUT
UART
GPIO
(U)SIM
Boost
Circuit
Pump
Charger
VBUS
WAKEUP_IN
QM215
WTR
2965
PM215
RFPA