Vantron VT-MOD-CELL-B48 - Chapter 5: Interface Electrical Characteristics - Specific; 5.1 Overview; 5.2 USIM Card Interface

VT-MOD-CELL-B48 Hardware User Manual
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5. Interface Electrical Characteristics
5.1 Overview
This chapter mainly describes each interface application of VT-MOD-CELL-B48 LTE
module, including:
5.1.1 USIM card interface
5.1.2 Power interface
5.1.3 USB bus
5.1.4 LED status indication
5.1.5 RESET interface
5.2 USIM Card Interface
USIM is a smart card for UMTS/LTE cellular applications. The USIM provides the
required subscription information to allow the mobile equipment to attach to a UMTS
or LTE network. The USIM also provides the subscriber’s verification procedures as
well as authentication methods for network authentication during the attach
procedures.
A class B (3.0 V)/class C (1.8 V) USIM card can be connected to VT-MOD-CELL-
B48 module. The USIM card interface signals are shown in Table 4-1.
Table 4-1 USIM pins
PIN
Name
Description Direction to Module
8 VSIM
Power source for the external
USIM
Output
10 UIM_DATA
External USIM data signal Input/output
12 UIM_CLK
External USIM clock signal Output
14 UIM_RESET
External USIM reset signal Output
Note: It is recommended that the USIM card is inserted only after the power of the
module is disconnected, otherwise the USIM card can be destroyed.