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Neoway Neo_M660A Hardware User's Manual

Gprs module
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Neo_M660A GPRS Module
Hardware User Guide
Version 1.1

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Summary of Contents for Neoway Neo_M660A

  • Page 1 Neo_M660A GPRS Module Hardware User Guide Version 1.1...
  • 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_M660A GPRS Module Hardware User Guide 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 Copyright © Neoway Technology Co., Ltd...

  • Page 4: Table Of Contents

    Neo_M660A GPRS Module Hardware User Guide 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 ....................
  • Page 5 Neo_M660A GPRS Module Hardware User Guide 8 Abbreviations ........................33 Copyright © Neoway Technology Co., Ltd...
  • Page 6 Neo_M660A GPRS Module Hardware User Guide 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 ................
  • Page 7 Neo_M660A GPRS Module Hardware User Guide 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 ......................

  • Page 8: About This Document

    SMS, and data services and is widely used in industrial and consumer fields. 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: ...

  • Page 9: Specifications

    Neo_M660A GPRS Module Hardware User Guide VBAT RF Front-end-module 26 MHz Crystal VRTC RF transceiver Power Manager ON/OFF Analog Digital Baseband Baseband FLASH Audio Interface Specifications Table 1-1 M660A specifications Specifications Description Band GSM850/EGSM900/DCS1800/PCS1900 MHz dual-band/quad-band Supporting band locking Sensitivity <...
  • Page 10 Neo_M660A GPRS Module Hardware User Guide Supporting echo suppression Supporting recording and DTMF check function  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 ...

  • Page 11: Pin Description And Pcb Foot Print

    Neo_M660A GPRS Module Hardware User Guide 2 Pin Description and PCB Foot Print Specifications and Encapsulation Specifications M660A Dimensions 24 mm x 24 mm x 2.6 mm (H x W x D) Weight 2.6 g Encapsulation 68-pin LGA Figure 2-1 Top view of the M660A module...

  • Page 12: Pin Definition

    Neo_M660A GPRS Module Hardware User Guide Pin Definition Table 2-1 M660A pin definition Reset Level Feature Name Function Remarks Status Power Supply and Switch Interfaces 3.5 V to 4.3 V 55, 56, Main power supply VBAT (3.9 V is input...
  • Page 13 Neo_M660A GPRS Module Hardware User Guide Clear to send I/PU 0<V <0.6 With internal 47K resistors to Request to send I/PU 2.1<V <3.1 respectively pull 0<V <0.42 UTXD UART data transmit O/PU CTS and URXD 2.38<V <2.8 up to 2.8 V...
  • Page 14 Neo_M660A GPRS Module Hardware User Guide USB Interfaces VBUS USB voltage test USB_DP DI/O Complying with Used for USB interface the USB1.1 firmware differential data cable USB_DM DI/O standard download Reserved Pins 5, 6, Must be left 11~14, disconnected. 34~38,...

  • Page 15: Pcb Foot Print

    Neo_M660A GPRS Module Hardware User Guide PCB Foot Print LCC packaging is adopted to package the pins of the M660A module. Figure 2-2 shows the recommended PCB foot print. Figure 2-2 PCB foot print recommended for M660A (unit: mm) 24.00 4.97...

  • Page 16: Interface Design

    Neo_M660A GPRS Module Hardware User Guide 3 Interface Design Power Supply and Switch Interfaces Table 3-1 Power supply and switch interface Pin Name 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...

  • Page 17: Figure 3-2 Reference Design D For The Power Supply

    Neo_M660A GPRS Module Hardware User Guide Figure 3-2 shows a recommended power supply design for the module. Figure 3-2 Reference design d 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_M660A GPRS Module Hardware User Guide Figure 3-4 Reference design of power supply controlled by p-MOSFET VCC_IN_3.9V VBAT 10 uF 0.1 uF 100pF 33 pF 470 uF 100K 10 uF 0.1 uF GPRS_EN In Figure 3-4, the module is powered on when GPRS_EN is set to high level.

  • 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 Procedure

    Neo_M660A GPRS Module Hardware User Guide Figure 3-6 VRTC reference design GPRS Module VRTC Backup Circuit Capacitor battery 3.1.4 Power On/Off 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 Turning Off Procedure

    2 seconds later it will shut down. Then shut down the main power supply. Figure 3-8 shows the procedure of turning off the module. Another approach to turn off the module is using AT commands. For details, see Neo_M660A GPRS Module AT Command Set. Figure 3-8 Turning off procedure...

  • Page 22: Reset

    Neo_M660A GPRS Module Hardware User Guide Figure 3-10 Reference circuit for power-on 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). R1 and R2 can be adjusted according to the driving capability of the USER_ON pin.

  • Page 23: Uart

    3.1 V. Supported baud rates range from 300 bit/s to 921600 bit/s and the default rate is 115200 bit/s. For more details about baudrate, see Neo_M660A GPRS Module Hardware User Guide. If the UART is interfacing with an MCU that has 3.3 V logic levels, resistors should be connected in series with the signals.

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

    Neo_M660A GPRS Module Hardware User Guide Figure 3-13 Recommended communication circuit between 3.3V MCU and UART VDD_EXT 0.1 uF MCU_UTXD Module_URXD RB521S 33 pF 200 Ω Module_UTXD MCU_URXD 33 pF In Figure 3-13, 100 pF filter capacitor should be placed near the receive pin of the module. Resistor (200 Ω...

  • Page 25: Usb Interfaces

    Neo_M660A GPRS Module Hardware User Guide INPUT is connected to TXD of the MCU and VCC_IN is connected to the 5 V power supply of the external MCU. OUTPUT is connected to RXD of the module. If the circuit is far away from the VDD_EXT pin, add a 0.1 μF decoupling capacitor to VDD_EXT.

  • Page 26: Dtr And Ring

    Left disconnected if not used 3.4.1 DTR Pin Generally DTR is used to control sleep mode together with AT commands. For details, see Neo_M660A GPRS Module AT Command Set. Based on the setting of the selected mode, pulling DTR low will bring the module into sleep mode if the module is idle.

  • Page 27: Sim Card Interface

    Neo_M660A GPRS Module Hardware User Guide Figure 3-16 RING indicator for incoming call 250 ms 250 ms  SMS: Upon receipt of SMS, the module outputs one 600 ms low pulse. Figure 3-17 RING indicator for SMS 600 ms SIM Card Interface...

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

    Neo_M660A GPRS Module Hardware User Guide Figure 3-18 Reference design of SIM card interface 20 Ω SIM_DATA 20 Ω SIM_CLK DATA 20 Ω SIM_RST VSIM 1 uF SIM Card GPRS 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

    2.8 V output, max. 4 mA When the module is running, the LED indicator is driven by the LIGHT pin to indicate different module status with its various blink behaviors. For how to set the LED indicator, see Neo_M660A GPRS Module AT Command Set.

  • Page 30: Audio Interface

    M660A supports two lines of audio interfaces. You can switch the audio channels and adjust the volume via AT commands. For details, see Neo_M660A GPRS AT Command Set. Figure 3-22 shows a reference audio interface design. The peak voltage routed to MICP/MICN should not exceed 200 mV AC.

  • Page 31: Figure 3-23 Reference Design For Common Audio Input

    Neo_M660A GPRS Module Hardware User Guide Figure 3-23 Reference design for common audio input MIC_BIAS 2.2 uF 33 pF 2.2 KΩ MICP Baseband User's Circuit Circuit MICN 2.2 kΩ 33 pF GPRS Module In Figure 3-22 and Figure 3-23, the audio input circuits are designed to meet the requirements for small audio signal, far away from interference source and masking PCB routing by ground.

  • Page 32: Rf Interface

    Neo_M660A GPRS Module Hardware User Guide Figure 3-25 Coupling capacitor interfacing RECP User's Circuit RECN GPRS Module RF Interface 3.8.1 RF Design and PCB Layout GPRS_ANT is the antenna interface of the module. A 50 Ω antenna is required. VSWR ranges from 1.0 to 1.5.

  • Page 33: Recommended Rf Connection

    Neo_M660A GPRS Module Hardware User Guide Figure 3-27 RF layout reference The RF traces are wide 0.5 mm; leave space at least 0.5 mm between the coppers. Drill enough grounding holes. Ensure that the ground pins on both sides of the antenna are grounded completely and they form a complete circle with grounding copper.

  • Page 34: Electric Features And Reliability

    Neo_M660A 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 35: Current

    Neo_M660A GPRS Module Hardware User Guide Current Table 4-3 Current feature Parameter Testing Conditions Testing Result (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 60 μA...

  • Page 36: Table 4-4 Esd Feature Of The Module

    Neo_M660A GPRS Module Hardware User Guide Humility: 45% Temperature: 25℃ Table 4-4 ESD feature of the module Testing Point Contact Discharge Air Discharge VBAT ± 8KV ± 15KV ± 8KV ± 15KV ± 8KV ± 15KV Cover ± 8KV ± 15KV RXD/TXD ±...

  • Page 37: Rf Features

    Neo_M660A GPRS Module Hardware User Guide 5 RF Features Work Band Table 5-1 Work band Work Band Uplink Downlink GSM850 824~849MHz 869~894MHz EGSM900 880~915MHz 925~960MHz DCS1800 1710~1785MHz 1805~1880MHz PCS1900 1850~1910MHz 1930~1990MHz 5.1.2 Transmitting Power Table 5-2 Transmitting power (GSM850&EGSM900) Transmitting Power...

  • Page 38: Receiving Sensitivity

    Neo_M660A GPRS Module Hardware User Guide 28 dBm ± 3 dBm 26 dBm ± 3 dBm 24 dBm ± 3 dBm 22 dBm ± 3 dBm 20 dBm ± 3 dBm 18 dBm ± 3 dBm 16 dBm ± 3 dBm 14 dBm ±...

  • Page 39: Mounting The Module Onto The Application Board

    Neo_M660A GPRS Module Hardware User Guide 6 Mounting the Module onto the Application Board M660A 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 40 Neo_M660A 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 41 Neo_M660A 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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