Neoway Neo_M680, Руководство пользователя по оборудованию

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Neo_M680 GPRS Module Hardware User Guide
Copyright © Neoway Technology Co., Ltd iii
Contents
About This Document ......................................................................................................... 1
1 Introduction to M680 ........................................................................................................ 1
1.1 Overview ..................................................................................................................................... 1
1.2 Block Diagram ............................................................................................................................ 1
1.3 Specifications .............................................................................................................................. 2
2 Pin Description and PCB Foot Print .............................................................................. 4
2.1 Specifications and Encapsulation ................................................................................................ 4
2.2 Pin Definition .............................................................................................................................. 5
2.3 PCB Foot Print ............................................................................................................................ 8
3 Interface Design................................................................................................................. 9
3.1 Power Supply and Switch Interfaces ........................................................................................... 9
3.1.1 Design Requirements ......................................................................................................... 9
3.1.2 VDD_EXT ....................................................................................................................... 12
3.1.3 VRTC ............................................................................................................................... 12
3.1.4 Power-On/Off Control and Procedure .............................................................................. 13
3.1.5 RESET .............................................................................................................................. 16
3.2 UART ........................................................................................................................................ 16
3.3 USB Interfaces .......................................................................................................................... 18
3.4 DTR and RING ......................................................................................................................... 19
3.4.1 DTR Pin ........................................................................................................................... 19
3.4.2 RING Signal Indicator...................................................................................................... 20
3.5 SIM Card Interface .................................................................................................................... 20
3.6 Running LED Indicator ............................................................................................................. 22
3.7 Audio Interface .......................................................................................................................... 23
3.8 RF Interface ............................................................................................................................... 26
3.8.1 RF Design and PCB Layout ............................................................................................. 26
3.8.2 Recommended RF Connection ......................................................................................... 28
4
Electric Features and Reliability
..................................................................................... 29
4.1 Electric Feature ......................................................................................................................... 29
4.2 Temperature ............................................................................................................................... 29
4.3 Current....................................................................................................................................... 30
4.4 ESD Protection .......................................................................................................................... 30
5 RF Features ....................................................................................................................... 32
5.1 Work Band ................................................................................................................................. 32
5.2 Transmitting Power and Receiving Sensitivity ......................................................................... 32
5.2.1 Transmitting Power .......................................................................................................... 32
5.2.2 Receiving Sensitivity ........................................................................................................ 33
6 Mounting the Module onto the Application Board.................................................. 34