Neoway Neo_M660A - Default Chapter; Table of Contents

Neo_M660A GPRS Module Hardware User Guide
Copyright © Neoway Technology Co., Ltd
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Contents
About This Document ......................................................................................................... 1
1 Introduction to M660A ..................................................................................................... 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 VBAT ................................................................................................................................. 9
3.1.2 VDD_EXT ....................................................................................................................... 12
3.1.3 VRTC ............................................................................................................................... 12
3.1.4 Power On/Off Procedure .................................................................................................. 13
3.1.5 RESET .............................................................................................................................. 15
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...................................................................................................... 19
3.5 SIM Card Interface .................................................................................................................... 20
3.6 Running LED Indicator ............................................................................................................. 22
3.7 Audio Interface .......................................................................................................................... 23
3.8 RF Interface ............................................................................................................................... 25
3.8.1 RF Design and PCB Layout ............................................................................................. 25
3.8.2 Recommended RF Connection ......................................................................................... 26
4 Electric Features and Reliability................................................................................... 27
4.1 Electric Feature ......................................................................................................................... 27
4.2 Temperature ............................................................................................................................... 27
4.3 Current....................................................................................................................................... 28
4.4 ESD Protection .......................................................................................................................... 28
5 RF Features ....................................................................................................................... 30
5.1 Work Band ................................................................................................................................. 30
5.1.2 Transmitting Power .......................................................................................................... 30
5.1.3 Receiving Sensitivity ........................................................................................................ 31
6 Mounting the Module onto the Application Board.................................................. 32
7 Package .............................................................................................................................. 32