Usim Signals; Usim Interface Schematic Reference; Table 3-5 Usim Pins - Huawei EM820W Hardware Manual

HUAWEI EM820W HSPA+ PC Embedded Module
Hardware Guide
The high-speed signal characteristics are in accordance with the Eye Pattern
Templates of the USB2.0 signal specification.

3.6 USIM Signals

The USIM is a smart card for UMTS/GSM cellular applications. The USIM provides
the required subscription information to allow mobile equipment to attach to a GSM or
UMTS network. The USIM also provides the subscriber's verification procedures as
well as authentication methods for network authentication during the process of
attaching to a network.

Table 3-5 USIM pins

Pin
8
10
12
14

3.6.1 USIM Interface Schematic Reference

There is no SIM card interface circuit in the EM820W module, and users need to add
the USIM interface circuit. Figure 3-2 shows the definition of interface signals and the
typical USIM interface schematic.
Issue 01 (2010-12-09)
Name Description
UIM_PWR Power source for the external
UIM/SIM.
UIM_DATA External UIM/SIM data signal.
UIM_CLK External UIM/SIM clock signal.
UIM_RESET External UIM/SIM reset signal.
It is recommended that the SIM card is inserted only after the power supply of the module is
disconnected; otherwise the SIM card may get destroyed.
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Description of the Application Interfaces
Direction to Module
Output
Input/output
Output
Output
10