HUAWEI MG323 GSM M2M Module
Issue 06 (2013-06-13)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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Contents
1 Introduction.................................................................................................................................... 8
1.1 Overview .......................................................................................................................................... 8
2 Overall Description ...................................................................................................................... 9
2.1 About This Chapter ........................................................................................................................... 9
2.2 Function Overview............................................................................................................................ 9
2.3 Application Block Diagram .............................................................................................................. 11
2.4 Circuit Block Diagram ...................................................................................................................... 11
3 Description of the Application Interfaces .............................................................................. 13
3.1 About This Chapter ......................................................................................................................... 13
3.2 B2B Connector Interface ................................................................................................................ 13
3.3 Power Interface .............................................................................................................................. 16
3.3.1 Overview ................................................................................................................................ 16
3.3.2 VBAT Interface ....................................................................................................................... 17
3.3.3 VCOIN Interface .................................................................................................................... 18
3.3.4 VIO Interface ......................................................................................................................... 18
3.4 Power-On and Power-Off Time Sequence ..................................................................................... 18
3.4.1 Overview ................................................................................................................................ 18
3.4.2 Power-On Time Sequence .................................................................................................... 19
3.4.3 Power-Off Time Sequence .................................................................................................... 20
3.4.4 RESET ................................................................................................................................... 20
3.5 Signal Control Interface .................................................................................................................. 20
3.5.1 Overview ................................................................................................................................ 20
3.5.2 Input Signal Control Pins ....................................................................................................... 21
3.5.3 Output Signal Control Pin ...................................................................................................... 22
3.6 UART Interface ............................................................................................................................... 23
3.6.1 Overview ................................................................................................................................ 23
3.6.2 Circuit Recommended for the UART Interface ...................................................................... 24
3.7 SIM Card Interface ......................................................................................................................... 25
3.7.1 Overview ................................................................................................................................ 25
3.7.2 Circuit Recommended for the SIM Card Interface ................................................................ 26
3.8 Audio Interface ............................................................................................................................... 27
4 Antenna Interface ........................................................................................................................ 29
