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Neoway Neo_M680 Hardware User's Manual

Gprs module
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Neo_M680 GPRS Module
Hardware User Guide
Version 1.4

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Summary of Contents for Neoway Neo_M680

  • Page 1 Neo_M680 GPRS Module Hardware User Guide Version 1.4...
  • Page 2 Neoway provides customers complete technical support. If you have any question, please contact your account manager or email to the following email addresses: Sales@neoway.com.cn...
  • Page 3 Neo_M680 GPRS Module Hardware User Guide Revision Record Issue Changes Revised By Date V1.0 Initial draft Qiao Naiwei 2013-10 V1.1 Modified the description of some pins Qiao Naiwei 2014-02 Modified the PCB encapsulation and definition of V1.2 Qiao Naiwei 2014-04 several pins V1.3...

  • Page 4: Table Of Contents

    Neo_M680 GPRS Module Hardware User Guide 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 ....................
  • Page 5 Neo_M680 GPRS Module Hardware User Guide 7 Package ..........................34 8 Abbreviations ........................35 Copyright © Neoway Technology Co., Ltd...
  • Page 6 Neo_M680 GPRS Module Hardware User Guide Table of Figures Figure 2-1 Top view of the M680 module ....................4 Figure 2-2 PCB foot print recommended for M680 (unit: mm) .............. 8 Figure 3-1 Current peaks and voltage drops .................... 9 Figure 3-2 Capacitors used for the power supply ..................
  • Page 7 Neo_M680 GPRS Module Hardware User Guide Table of Tables Table 1-1 M680 specifications......................... 2 Table 2-1 M680 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 ......................

  • Page 8: About This Document

    SMS, and data services and is widely used in industrial and civil fields. Overview Neoway M680 module adopts 83-pin LGA encapsulation and its dimensions are 18 mm x 15 mm x 2.1 mm, which can meet most customers' requirements. It provides customers the following hardware resources: ...

  • Page 9: Specifications

    Neo_M680 GPRS Module Hardware User Guide VBAT RF Front-end-module 26 MHz Crystal RF transceiver VRTC Power Manager ON/OFF Analog Digital Baseband Baseband FLASH Audio Interface Digital Interface Specifications Table 1-1 M680 specifications Specifications Description Band GSM850/EGSM900/DCS1800/PCS1900 MHz dual-band/quad-band Supporting band locking Sensitivity <...
  • Page 10 Neo_M680 GPRS Module Hardware User Guide Audio Available audio coding:     Supporting echo suppression Supporting recording and DTMF check function  TEXT/PDU  Supporting SMS message receiving and transmitting and alert for new SMS messages  Supporting SMS message management: reading/deleting/storage/list ...

  • Page 11: Pin Description And Pcb Foot Print

    Neo_M680 GPRS Module Hardware User Guide 2 Pin Description and PCB Foot Print Specifications and Encapsulation Specifications M680 Dimensions 18 mm x 15 mm x 2.1 mm (H x W x D) Weight 1.2 g Encapsulation 83-pin LGA Figure 2-1 Top view of the M680 module...

  • Page 12: Pin Definition

    Neo_M680 GPRS Module Hardware User Guide Pin Definition Table 2-1 M680 pin definition Name Function Reset Level Feature Remarks Status Power Supply and Switch Interfaces 57, 58, Main power supply 3.5 V to 4.3 V (3.9 V VBAT 59, 68...
  • Page 13 Neo_M680 GPRS Module Hardware User Guide Negative electrode RECN of receiver output 32 Ω receiver driving output Negative electrode RECP of receiver output UART Interface Request to send I/PD 0 ＜ V ＜ 0.6 Clear to send I/PD 2.1 ＜ V ＜...
  • Page 14 Neo_M680 GPRS Module Hardware User Guide GPRS antenna 50 Ω impedance GPRS_ANT AI/O interface USB Interfaces USB_DM DI/O USB interface Complying with Used for firmware differential data the USB1.1 download USB_DP DI/O cable standard VBUS USB voltage test Reserved Pins...

  • Page 15: Pcb Foot Print

    Neo_M680 GPRS Module Hardware User Guide PCB Foot Print LGA packaging is adopted to package the pins of the M680 module. Figure 2-2 shows the recommended PCB foot print. Figure 2-2 PCB foot print recommended for M680 (unit: mm) 6.65 15.0...

  • Page 16: Interface Design

    Neo_M680 GPRS Module Hardware User Guide 3 Interface Design Power Supply and Switch Interfaces Table 3-1 Power supply and switch interface Signal Function Remarks VBAT Main power supply input 3.5 V to 4.3 V (3.9 V is recommended) VDD_EXT 2.8 V power supply output Loading capability <...

  • Page 17: Figure 3-2 Capacitors Used For The Power Supply

    Neo_M680 GPRS Module Hardware User Guide Figure 3-2 shows a recommended power supply design for the module. Figure 3-2 Capacitors used for the power supply Current testing point VBAT I_max Power Supply GPRS Module D1 C1 C2 C3 C4 Close to the pin of the module In the circuit, you can use TVS at D1 to enhance the performance of the module during a burst.

  • Page 18: Figure 3-4 Reference Design Of Power Supply Controlled By P-Mosfet

    Neo_M680 GPRS Module Hardware User Guide Figure 3-4 Reference design of power supply controlled by p-MOSFET Q2 is added to eliminate the need for a high enough voltage level of the host GPIO. In case that the GPIO can output a high voltage greater than VDD_IN_3.9V - |V...

  • Page 19: Vdd_Ext

    Never use a diode to make the drop voltage between a higher input and module power. Otherwise, Neoway will not provide warranty for product issues caused by this. In this situation, the diode will obviously decrease the module performances, or result in unexpected restarts, due to the forward voltage of diode will vary greatly in different temperature and current.

  • Page 20: Power-On/Off Control And Procedure

    Neo_M680 GPRS Module Hardware User Guide Figure 3-6 VRTC reference design GPRS Module 1.5K VRTC Backup Circuit Capacitor battery 3.1.4 Power-On/Off Control and Procedure Prior to turning on the module, power on the host MCU and finish the UART initialization. Otherwise conflictions may occur during initialization, due to unstable conditions.

  • Page 21: Figure 3-8 Power-Off Procedure

    2 seconds later it will shut down. Another approach to turn off the module is using AT commands. For details, see Neo_M680 GPRS Module AT Commands. Figure 3-8 shows the power-off procedure of the module.

  • Page 22: Figure 3-10 Reference Circuit For Power-On/Off Controlled By High Level

    Neo_M680 GPRS Module Hardware User Guide Figure 3-10 Reference circuit for power-on/off controlled by high level ON/OFF 4.7K GPRS Module USER_ON In Figure 3-10, high level takes effect for ON/OFF on the user side (USER_ON) after level shifting. R1 and R2 can be adjusted according to the driving capability of the USER_ON pin.

  • Page 23: Reset

    Neo_M680 GPRS Module Hardware User Guide 3.1.5 RESET You can reset the module by keeping the RESET pin low level for more than 100 ms. The pin is pulled up by an internal resistor and the typical high level is 2.8 V. The RESET pin can be left disconnected if not used. If you use 3.3 V IO system, you are advised to separate it by using triode.

  • Page 24: Figure 3-13 Recommended Circuit For The Communication Between 3.3V Mcu And Uart

    Neo_M680 GPRS Module Hardware User Guide The UART of M680 works at 2.8 V CMOS logic level. The voltages for input high level should not exceed 3.1 V. Supported baud rates are 1200, 2400, 4800, 9600, 14400, 19200, 38400, 57600, 115200 bit/s, and the default rate is 115200 bit/s.

  • Page 25: Usb Interfaces

    Neo_M680 GPRS Module Hardware User Guide Figure 3-14 Recommended circuit for the communication between 5V MCU and UART VCC_IN VCC_OUT 4.7K INPUT OUTPUT In Figure 3-14, INPUT is connected to TXD of the MCU and VCC_IN is connected to the 5 V power supply of the MCU.

  • Page 26: Dtr And Ring

    Neo_M680 GPRS Module Hardware User Guide For M680 modules, you can download and commission software through the USB interface. Before that, connect USB interface to a computer and then power on the module. Figure 3-15 shows the recommended connection between the module and a computer.

  • Page 27: Ring Signal Indicator

    Neo_M680 GPRS Module Hardware User Guide Upon receipt of the unsolicited messages, the host MCU should pull DTR high firstly, otherwise the module will resume sleep mode shortly. And then the host MCU can process the voice call, received data, or SMS. After processing is finished, pull DTR low again to put the module into sleep mode.

  • Page 28: Figure 3-18 Reference Design Of Sim Card Interface

    Neo_M680 GPRS Module Hardware User Guide SIM_CLK can work at several frequencies at 3.25 MHz typically. Figure 3-18 Reference design of SIM card interface SIM_DATA SIM_CLK DATA SIM_RST VSIM GPRS SIM卡 1 uF Module ESD protectors, such as ESD diodes (lower than 33 pF) or ESD varistors, are recommended on the SIM signals, especially in automotive electronics or other applications with badly ESD.

  • Page 29: Running Led Indicator

    Neo_M680 GPRS Module Hardware User Guide SIM card is sensitive to GSM TDD noise and RF interference. So, the PCB design should meet the following requirements:  The antenna should be installed far away from the SIM card and SIM card traces, especially to the build-in antenna.

  • Page 30: Audio Interface

    Negative electrode of receiver output M680 supports multiple lines of audio interfaces to meet customers' requirements for audio. You can switch the audio channels and adjust the volume via AT commands. For details, see Neo_M680 GPRS Module AT Command Set.

  • Page 31: Figure 3-22 Reference Design Of Mic Differential Connections

    Neo_M680 GPRS Module Hardware User Guide Figure 3-22 Reference design of MIC differential connections 33 pF MICP 100 pF GPRS Module MICN 33 pF In Figure 3-23, a bias voltage for microphone is provided through MICP and MICN. But if an amplifier is used between the microphone and module, capacitors like C1 and C2, should be placed between the outputs of amplifier and module, to block the bias voltage.

  • Page 32: Figure 3-24 Reference Design For Receiver Output

    Neo_M680 GPRS Module Hardware User Guide Figure 3-24 Reference design for receiver output 33 pF RECP 100 pF GPRS Module RECN Receiver@32 33 pF The maximum output power of SPKP/N is 0.8W@8Ω. Figure 3-25 Reference design for speaker output 33 pF...

  • Page 33: Rf Interface

    Neo_M680 GPRS Module Hardware User Guide Figure 3-26 Reference design for earphone output EAR_R GPRS Module EAR_L 33pF 33pF If an external amplifier is used to drive the speakers, coupling capacitors of 2.2 μF to 4.7 μF should be used to block the DC voltage, as shown in Figure 3-27.

  • Page 34: Figure 3-28 Reference Design For Antenna Interface

    Neo_M680 GPRS Module Hardware User Guide Figure 3-28 Reference design for antenna interface GPRS_ANT GPRS Module On two-layer boards which cannot control resistance properly, the RF route should be as short and smooth as possible and at a width of 0.5 mm; the RF is 0.5 mm away from the ground.

  • Page 35: Recommended Rf Connection

    Neo_M680 GPRS Module Hardware User Guide 3.8.2 Recommended RF Connection If you adopts RF cables for connections, the GSC RF connector MM9329-2700RA1 from Murata is recommended. Figure 3-30 shows the encapsulation specifications. Figure 3-30 Encapsulation specifications of Murata RF connector RF cable can also be connected to the module by soldering.

  • Page 36: Electric Features And Reliability

    Neo_M680 GPRS Module Hardware User Guide 4 Electric Features and Reliability Electric Feature Table 4-1 Electric feature of the module Parameter Minimum Value Typical Value Maximum Value 3.5 V 3.9 V 4.3 V VBAT VBUS 4.3 V Vout 2.8 V...

  • Page 37: Current

    Neo_M680 GPRS Module Hardware User Guide Current Table 4-3 Current feature Testing Result Parameter Testing Conditions (Average Current) Testing voltage 3.9 V Agilent power supply Idle mode Set the instrument and power on the module. 18 mA Power on the module or use AT command to shut...

  • Page 38: Table 4-4 Esd Feature Of The Module

    Neo_M680 GPRS Module Hardware User Guide Humility: 45% Temperature: 25℃ Table 4-4 ESD feature of the module Testing Point Contact Discharge Air Discharge VBAT ± 8 KV ± 15 KV ± 8 KV ± 15 KV ± 8 KV ± 15 KV Cover ±...

  • Page 39: Rf Features

    Neo_M680 GPRS Module Hardware User Guide 5 RF Features Work Band Table 5-1 Work band Work Band Uplink Downlink GSM850 824~849 MHz 869~894 MHz EGSM900 880~915 MHz 925~960 MHz DCS1800 1710~1785 MHz 1805~1880 MHz PCS1900 1850~1910 MHz 1930~1990 MHz Transmitting Power and Receiving Sensitivity 5.2.1 Transmitting Power...

  • Page 40: Receiving Sensitivity

    Neo_M680 GPRS Module Hardware User Guide Table 5-3 Transmitting power (DCS1800&PCS1900) Transmitting Power Threshold Range 30 dBm ± 2 dBm 28 dBm ± 3 dBm 26 dBm ± 3 dBm 24 dBm ± 3 dBm 22 dBm ± 3 dBm 20 dBm ±...

  • Page 41: Mounting The Module Onto The Application Board

    Neo_M680 GPRS Module Hardware User Guide 6 Mounting the Module onto the Application Board M680 is compatible with industrial standard reflow profile for lead-free SMT process. The reflow profile is process dependent, so the following recommendation is just a start point guideline: ...
  • Page 42 Neo_M680 GPRS Module Hardware User Guide 8 Abbreviations Analog-Digital Converter Automatic Frequency Control Automatic Gain Control Acknowledged multirate (speech coder) Circuit Switched Data Central Processing Unit Digital Audio interface Digital-to-Analog Converter Data Communication Equipment Digital Signal Processor Data Terminal Equipment...
  • Page 43 Neo_M680 GPRS Module Hardware User Guide Random Access Memory Radio Frequency Read-only Memory Root Mean Square Real Time Clock Subscriber Identification Module Short Message Service SRAM Static Random Access Memory Terminal adapter TDMA Time Division Multiple Access UART Universal asynchronous receiver-transmitter...

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