User Guide

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3.5 USIM Card Interface
The signal definition of the M3B module USIM card interface is as below.
Table 7 USIM card interface signals
Pin No. Pin Name I/O Typ.(V) Description
8 USIM_VDD PO 1.8V/3.0V Output Power supply for
USIM card
10 USIM_DATA IO 1.8V/3.0V USIM/SIM Data
12 USIM_CLK DO 1.8V/3.0V USIM/SIM Clock
14 USIM_RST DO 1.8V/3.0V USIM/SIM Reset
The M3B module is available with 1.8V and 3.0V USIM/SIM card.
Figure 5 shows the circuit of the 6-pin USIM card interface.
Figure 5 Circuit of the 6-pin USIM Card Interface
USIM_VDD
GND
USIM_RST
USIM_CLK
USIM_DATA
0 R
0
R
0 R
100 nF
USIM
卡座
GND
33 pF33pF33pF
VCC
RST
CLK IO
VPP
GND
GND
15 K
Module
USIM_VDD
uCloudlink M3B Mini PCIe-C _Hardware Design Guide_V1.0