Neoway Neo_M660A Installation manual

Neo_M660A GPRS Module
Hardware User Guide
Version 1.1

Neo_M660AGPRS Module Hardware User Guide
Copyright © Neoway Technology Co., Ltd
i
Copyright © Neoway Technology Co., Ltd 2014. All rights reserved.
No part of this document maybe reproduced or transmitted in any form or by any means without prior
written consent of Shenzhen Neoway Technology Co., Ltd.
is the trademark of Neoway Technology Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
This document is intended for system engineers (SEs), development engineers, and test engineers.
The information in this document is subject to change without notice due to product version update or
other reasons.
Every effort has been made in preparation of this document to ensure accuracy of the contents, but all
statements, information, and recommendations in this document do not constitute a warranty of any
kind, express or implied.
Neoway provides customers complete technical support. If you have any question, please contact
your account manager or email to the following email addresses:
[e-mail]
[e-mail]
Website: http://www.neoway.com.cn

Neo_M660AGPRS Module Hardware User Guide
Copyright © Neoway Technology Co., Ltd
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Revision Record
Issue
Changes
Revised By
Date
V1.0
Initial draft
Li Zhongqiu
2014-06
V1.1
Modified the definition of pin 53
Li Zhongqiu
2014-06

Neo_M660AGPRS Module Hardware User Guide
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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

Neo_M660AGPRS Module Hardware User Guide
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8 Abbreviations................................................................................................................... 33

Neo_M660AGPRS Module Hardware User Guide
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Table of Figures
Figure 2-1 Top view of the M660A module ............................................................................................ 4
Figure 2-2 PCB foot print recommended for M660A (unit: mm) ........................................................... 8
Figure 3-1 Current peaks and voltage drops............................................................................................ 9
Figure 3-2 Reference design d for the power supply............................................................................. 10
Figure 3-3 Reference design of power supply control........................................................................... 10
Figure 3-4 Reference design of power supply controlled by p-MOSFET..............................................11
Figure 3-5 Reference designs of separated power supply...................................................................... 12
Figure 3-6 VRTC reference design........................................................................................................ 13
Figure 3-7 Turning on procedure........................................................................................................... 13
Figure 3-8 Turning off procedure .......................................................................................................... 14
Figure 3-9 Reference circuit for ON/OFF controlled by low level........................................................ 14
Figure 3-10 Reference circuit for power-on controlled by high level.................................................... 15
Figure 3-11 Reset circuit with triode separating.................................................................................... 15
Figure 3-12 Signal connection between DCE and DTE ........................................................................ 16
Figure 3-13 Recommended communication circuit between 3.3V MCU and UART ........................... 17
Figure 3-14 Recommended communication circuit between 5V MCU and UART .............................. 17
Figure 3-15 USB circuit ........................................................................................................................ 18
Figure 3-16 RING indicator for incoming call ...................................................................................... 20
Figure 3-17 RING indicator for SMS.................................................................................................... 20
Figure 3-18 Reference design of SIM card interface............................................................................. 21
Figure 3-19 Reference of SIM card socket............................................................................................ 21
Figure 3-20 LED indicator directly driven by high level....................................................................... 22
Figure 3-21 LED indicator driven by transistor..................................................................................... 22
Figure 3-22 Reference design of MIC differential connections............................................................. 23
Figure 3-23 Reference design for common audio input ........................................................................ 24
Figure 3-24 Reference design for receiver output ................................................................................. 24
Figure 3-25 Coupling capacitor interfacing........................................................................................... 25
Figure 3-26 Reference design for antenna interface.............................................................................. 25
Figure 3-27 RF layout reference............................................................................................................ 26
Figure 3-28 Encapsulation specifications of Murata RF connector....................................................... 26
Figure 3-29 RF connections................................................................................................................... 26

Neo_M660AGPRS Module Hardware User Guide
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Table of Tables
Table 1-1 M660A specifications.............................................................................................................. 2
Table 2-1 M660A pin definition.............................................................................................................. 5
Table 3-1 Power supply and switch interface .......................................................................................... 9
Table 3-2 UART .................................................................................................................................... 16
Table 3-3 USB interface ........................................................................................................................ 18
Table 3-4 DTR and RING pins.............................................................................................................. 19
Table 3-5 SIM card interface................................................................................................................. 20
Table 3-6 LED indicator........................................................................................................................ 22
Table 3-7 Audio interface ...................................................................................................................... 23
Table 4-1 Electric feature of the module ............................................................................................... 27
Table 4-2 Temperature Feature.............................................................................................................. 27
Table 4-3 Current feature....................................................................................................................... 28
Table 4-4 ESD feature of the module .................................................................................................... 29
Table 5-1 Work band ............................................................................................................................. 30
Table 5-2 Transmitting power (GSM850&EGSM900) ......................................................................... 30
Table 5-3 Transmitting power (DCS1800&PCS1900) .......................................................................... 30

Neo_M660AGPRS Module Hardware User Guide
Copyright © Neoway Technology Co., Ltd
1
About This Document
This document defines the features, indicators, and test standards of the M660Amodule and provides
reference for the hardware design of each interface. With Neo_M660A GPRS Module AT Command Set, this
user guide can help you complete wireless communication application easily.
1 Introduction to M660A
M660A is a compact wireless GSM/GPRS module that supports downlink EDGE. It can provide functions
of high-quality voice, SMS, and data services and is widely used in industrial and consumer fields.
1.1 Overview
Neoway M660A module adopts 68-pin LCC encapsulation and its dimensions are 24 mm x 24 mm x 2.6
mm, which can meet most customers' requirements. It provides customers the following hardware resources
and features:
UART interfaces, used for data communication, firmware updating and commissioning, and
supporting hardware flow control
Audio interfaces, including one line of MIC input (differential) and one line of receiver output
(differential)
10-bitADC input, voltage ranging from 0 V to 2.8 V
One line of SIM card interface, compatible with 1.8 V and 3.0V SIM card
RING/LIGHT/DTR (sleep mode) functions
Time updating and timing power-on/off
Firmware updating via USB interface
1.2 Block Diagram
The M660A module consists of baseband controller, Flash ROM, RF section, application interfaces, etc. All
sections coordinate with each other to provide such communication functions as GPRS data and voice.
The following figure shows the block diagram of M660A.

Neo_M660AGPRS Module Hardware User Guide
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VBAT
VRTC
Digital
Interface
USB
SIM
UART
ON/OFF
Power
Manager
RF transceiver
FLASH
Digital
Baseband
Analog
Baseband
26 MHz CrystalRF Front-end-module
Audio
Interface
MIC
SIM PC
ADC
REC
1.3 Specifications
Table 1-1 M660Aspecifications
Specifications
Description
Band
GSM850/EGSM900/DCS1800/PCS1900 MHz dual-band/quad-band
Supporting band locking
Sensitivity
< -107 dBm
Max. transmit power
GSM850/EGSM900 Class4(2W)
DCS1800/PCS1900 Class1(1W)
Protocol
Supporting GSM/GPRS Phase 2/2+
AT
GSM07.07
Extended AT commands
Audio
Supporting the following audio coding:
HR
FR
EFR
AMR

Neo_M660AGPRS Module Hardware User Guide
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Supporting echo suppression
Supporting recording and DTMF check function
SMS
TEXT/PDU
Supporting SMS message receiving and sending and ring for new SMS
messages
Supporting SMS message management: reading/deleting/storage/list
GPRS feature
GPRS CLASS 12
Max. theoretic uplink rate: 85.6 Kbit/s
Max. theoretic downlink rate: 85.6 Kbit/s
Built-in TCP/IP protocol, supporting multiple links
Supporting server and client modes
Circuit Switch Data
CSD
USSD
Supplementary
service
Call forwarding
Call waiting
Call holding and multi-way calling
UART
Supporting hardware flow control, RTS and CTS controlled via AT commands
Supporting multiplexing
Supporting AT sending, data transmission, and software download
Supporting baudrate from 1200 bit/s to 115200 bit/s
RTC
Supporting real-time clock and time updating
Supporting timing power-on/off
CPU
ARM7-EJ@360MHz
Antenna feature
50 Ω impedance
Operating
temperature
-40℃to +85℃
Operating voltage
3.5 V to 4.3 V (3.9 V is recommended)
Peak current
Max 2.0 A
Idle current
18 mA
Current in sleep
mode
< 2 mA (live network)
< 1 mA (instrument, DRX=9)