Filter
Top Products
HUAWEI MG323 GSM M2M Module
Hardware Guide
Description of the Application Interfaces
Issue 04 (2011-08-22)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
22
For detailed application of the MG323 UART1 interface, see HUAWEI Module UART Serial
Port Design Guide.
3.7 SIM Card Interface
3.7.1 Overview
The MG323 module provides a SIM card interface complying with the ISO 7816-3
standard and supports automatic detection of a 3.0 V SIM card or a 1.8 V SIM card.
Table 3-6 lists the SIM card interface signals.
Table 3-6 SIM card interface signals
Pin No.
Signal Name
I/O
Description
1
SIM_CLK
O
Clock signal of the SIM card
3
VSIM
O
Power supply of the SIM card
5
SIM_DATA
I/O
Data signal of the SIM card
7
SIM_RST
O
Reset signal of the SIM card
11
GND
Ground signal of the SIM card
3.7.2 Circuit Recommended for the SIM Card Interface
As the MG323 module is not equipped with a SIM card socket, you need to place a
SIM card socket on the user interface board. The SIM card signals are transmitted
outwards through the 50-pin B2B connector interface. Figure 3-10 shows the circuit
of the SIM card interface.