Neoway Technology 125X GPRS Module User Manual Neo M590 GPRS Module User Guide V1 2x

Shenzhen Neoway Technology Co., Ltd GPRS Module Neo M590 GPRS Module User Guide V1 2x

User manual

M590 GPRS Module Hardware User Guide Version 1.2
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd i Copyright © Neoway Technology Co., Ltd 2014. All rights reserved. No part of this document may be 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: Sales@neoway.com.cn Support@neoway.com.cn Website: http://www.neoway.com.cn
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd ii Revision Record Issue Changes Revised By Date V1.0 Initial draft Qiao Naiwei 2013-10 V1.1 Modified the description of VCCIO Qiao Naiwei 2014-04 V1.2 Added chapter 4. Weng Peibin 2014-05
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd iii Contents About This Document ......................................................................................................... 1 1 Introduction to M590 ........................................................................................................ 1 1.1 Overview ..................................................................................................................................... 1 1.2 Block Diagram ............................................................................................................................ 1 1.3 Specifications .............................................................................................................................. 2 2 Pin Description and PCB Foot Print .............................................................................. 3 2.1 Specifications and Encapsulation ................................................................................................ 3 2.2 Pin Definition .............................................................................................................................. 4 2.3 PCB Foot Print ............................................................................................................................ 6 3 Interface Design................................................................................................................. 7 3.1 Power Supply and Switch Interfaces ........................................................................................... 7 3.1.1 Design Requirements ......................................................................................................... 7 3.1.2 VDD_EXT ....................................................................................................................... 10 3.1.3 Power-On/Off Control and Procedure .............................................................................. 10 3.1.4 RESET ............................................................................................................................. 13 3.2 UART ........................................................................................................................................ 13 3.3 DTR and RING ......................................................................................................................... 15 3.3.1 DTR Pin ........................................................................................................................... 15 3.3.2 RING Signal Indicator ..................................................................................................... 16 3.4 SIM Card Interface .................................................................................................................... 16 3.5 Running LED Indicator ............................................................................................................. 18 3.6 RF Interface............................................................................................................................... 19 3.6.1 RF Design and PCB Layout ............................................................................................. 19 3.6.2 Recommended RF Connection......................................................................................... 21 4 Electric Features and Reliability ..................................................................................... 22 4.1 Electric Feature ......................................................................................................................... 22 4.2 Temperature............................................................................................................................... 22 4.3 Current ...................................................................................................................................... 23 4.4 ESD Protection .......................................................................................................................... 23 5 RF Features ....................................................................................................................... 25 5.1 Work Band ................................................................................................................................ 25 5.2 Transmitting Power and Receiving Sensitivity ......................................................................... 25 5.2.1 Transmitting Power .......................................................................................................... 25 5.2.2 Receiving Sensitivity ....................................................................................................... 26 6 Mounting the Module onto the Application Board.................................................. 27 7 Package .............................................................................................................................. 27 8 Abbreviations ................................................................................................................... 28
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd iv Table of Figures Figure 2-1 Top view of the M590 module ............................................................................................... 3 Figure 2-2 PCB foot print recommended for M590 (unit: mm) .............................................................. 6 Figure 3-1 Current peaks and voltage drops ............................................................................................ 7 Figure 3-2 Capacitors used for the power supply .................................................................................... 8 Figure 3-3 Reference design of power supply control ............................................................................. 8 Figure 3-4 Reference design of power supply controlled by p-MOSFET ............................................... 9 Figure 3-5 Reference designs of separated power supply ...................................................................... 10 Figure 3-6 Power-on procedure ............................................................................................................. 11 Figure 3-7 Power-off procedure ............................................................................................................. 11 Figure 3-8 Reference circuit for power-on/off control ........................................................................... 12 Figure 3-9 Reference circuit for power-on/off controlled by high level ................................................ 12 Figure 3-10 Reset circuit with triode separating .................................................................................... 13 Figure 3-11 Signal connection between DCE and DTE ......................................................................... 13 Figure 3-12 Recommended circuit for the communication between 3.3V MCU and UART ................ 14 Figure 3-13 Recommended circuit for the communication between 5V MCU and UART ................... 14 Figure 3-14 RING indicator for incoming call ...................................................................................... 16 Figure 3-15 RING indicator for SMS .................................................................................................... 16 Figure 3-16 Reference design of SIM card interface ............................................................................. 17 Figure 3-17 Reference of SIM card socket ............................................................................................ 17 Figure 3-18 LED indicator ..................................................................................................................... 18 Figure 3-19 Reference design for antenna interface .............................................................................. 19 Figure 3-20 RF layout reference ............................................................................................................ 20 Figure 3-21 Reference RF design when pin 21 is not used .................................................................... 20 Figure 3-22 Encapsulation specifications of Murata RF connector ....................................................... 21
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd v Table of Tables Table 1-1 M590 specifications ................................................................................................................. 2 Table 2-1 M590 pin definition ................................................................................................................. 4 Table 3-1 Power supply and switch interface .......................................................................................... 7 Table 3-2 UART .................................................................................................................................... 13 Table 3-3 DTR and RING pins .............................................................................................................. 15 Table 3-4 SIM Card Interface ................................................................................................................ 16 Table 3-5 LED indicator ........................................................................................................................ 18 Table 4-1 Electric feature of the module ................................................................................................ 22 Table 4-2 Temperature Feature .............................................................................................................. 22 Table 4-3 Current feature ....................................................................................................................... 23 Table 4-4 ESD feature of the module .................................................................................................... 23 Table 5-1 Work band .............................................................................................................................. 25 Table 5-2 Transmitting power (EGSM900) ........................................................................................... 25 Table 5-3 Transmitting power (DCS1800) ............................................................................................ 25
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 1 About This Document This document defines the features, indicators, and test standards of the M590 module and provides reference for the hardware design of each interface. With M590 GPRS Module AT Command Set, this user guide can help you complete wireless communication application easily. 1 Introduction to M590 M590 is a compact wireless GPRS module that supports downlink EDGE. It can provide functions of SMS and data services and is widely used in industrial and consumer fields. 1.1 Overview Neoway M590 module adopts 21-pin LCC encapsulation and its dimensions are 27.6 mm x 21.6 mm x 2.6 mm. It provides customers the following hardware resources: l UART interfaces, used for data communication, firmware updating and commissioning l 10-bit ADC input, voltage ranging from 0 V to 2.8 V l Adapting to 1.8 V and 3.0V SIM card l Supporting RING/LIGHT/DTR (sleep mode) functions l Supporting time updating 1.2 Block Diagram The M590 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 M590. DTRRINGUARTADCSIM
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 2 1.3 Specifications Table 1-1 M590specifications Specifications Description Band EGSM900/DCS1800 MHz dual-band Supporting band locking Sensitivity < -107 dBm Max. transmit power l EGSM900 Class4(2W) l DCS1800 Class1(1W) Protocol Compatible with GSM/GPRS Phase 2/2+ AT l GSM07.07 l Extended AT commands SMS l TEXT/PDU l Supporting SMS message receiving and transmitting and alert for new SMS messages l Supporting SMS message management: reading/deleting/storage/list GPRS feature l GPRS CLASS 12 l Max. theoretic uplink rate: 85.6 Kbit/s l Max. theoretic downlink rate: 85.6 Kbit/s l Built-in TCP/IP protocol, supporting multiple links l Supporting server and client modes Circuit Switch Data l CSD data service l USSD UART l Supporting UART multiplexing l Supporting AT sending, data transmission, and software download l Supporting baudrate from 1200 bit/s to 115200 bit/s 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)
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 3 2 Pin Description and PCB Foot Print 2.1 Specifications and Encapsulation Specifications M590 Dimensions 27.6 mm x 21.6 mm x 2.6 mm (H x W x D) Weight 2.6 g Encapsulation 21-pin LCC Figure 2-1 Top view of the M590 module SIMGPRS_ANT OtherNC 12345678910 1112131415161718192021GNDVBATVBATGNDLIGHTVDD_EXTURXDUTXDDTRRING SIM_DATASIM_CLKSIM_RSTVSIMGNDADC_INNCRESETON/OFFGNDGPRS_ANTPower GND UART ADCM590 TOP View
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 4 2.2 Pin Definition Table 2-1 M590 pin definition Pin Name I/O Function Reset Status Level Feature (V) Remarks Power Supply and Switch Interfaces 2, 3 VBAT P Main power supply input 3.5 V to 4.3 V (3.9 V is recommended) 6 VDD_EXT P 2.8 V power supply output Supply power for IO level shifting circuit. Load capability: less than 50 mA 1, 4, 15, 20 GND P Ground 19 ON/OFF DI On/Off input 0<VIL<0.6 2.1<VIH<VBAT Low level pulse can change the On/Off state. 18 RESET DI Reset input 0<VIL<0.6 2.1<VIH<3.1 Internally pulled up to 2.8V Low level reset UART Interface 7 URXD DI UART data receive I/PU 0<VIL<0.6 2.1<VIH<3.1 0<VOL<0.42 2.38<VOH<2.8 With 47K pull-up inside 8 UTXD DO UART data transmit SIM Card 11 SIM_DATA DI/O SIM card data IO 0<VIL<0.25*VSIM， 0.75*VSIM<VIH<VSIM 0<VOL<0.15*VSIM 0.85*VSIM<VOH<VSIM Compatible with 1.8/3.0 V SIM card 12 SIM_CLK DO SIM card clock output 13 SIM_RST DO SIM card reset output 14 VSIM P SIM card power supply output LED Indicators 5 LIGHT DO Status LED I/PD 2.8 V/4 mA output Sleep Mode Controlling 9 DTR DI Signal for controlling sleep mode I/PD 0<VIL<0.6 2.1<VIH<3.1 0<VOL<0.42 Low level by default Used together with AT commands
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 5 2.38<VOH<2.8 SMS and Incoming Call Ring 10 RING DO Ring output I/PD 0<VIL<0.6 2.1<VIH<3.1 0<VOL<0.42 2.38<VOH<2.8 Detect incoming SMS messages or calls ADCDetecting 16 ADC_IN AI 10-bitADC input Detectable voltage range: 0 V to 2.8 V GPRS Antenna 21 GPRS_ANT AI/O GPRS antenna interface 50 Ω impedance Reserved Pins 17 NC Must be left disconnected. P: indicates power supply pins NC: indicates pins that are not supported and must not be connected DI: indicates digital signal input pins DO: indicates digital signal output pins I/PD: indicates digital signal input pins with pull-down I/PU: indicates digital signal input pins with pull-up AI: indicates analogy signal input pins AO: indicates analogy signal output pins The maximum input voltage at all IO ports (including peak signal current) cannot exceed 3.1 V because the module uses a 2.8 V IO power system. In the application of the module, the IO output voltage from the 3.3 V power supply system of the external circuit might greatly overshoot 3.1 V due to the signal integrity design. In this situation, the IO pins of the module might be damaged if the IO signals are connected to the IO port on the 2.8-V system. To rectify this issue, take measures to match the level. For details, see the Section 3.2 UART.
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 6 2.3 PCB Foot Print LCC packaging is adopted to package the pins of the M590 module. Figure 2-2 shows the recommended PCB foot print. Figure 2-2 PCBfoot print recommended for M590 (unit: mm) 21.227.62.5421.63.44.02.35M590 Pads 1~20 : 1.8*2.4 Pad 21 : 1.2*1.6Pitch： X=21.2；Y=2.54Unit：mmCopper Cut D=2.0
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 7 3 Interface Design 3.1 Power Supply and Switch Interfaces Table 3-1 Power supply and switch interface Signal I/O Function Remarks VBAT P Main power supply input 3.5 V to 4.3 V (3.9 V is recommended) VDD_EXT P 2.8 V power supply output Loading capability < 50 mA RESET DI Module reset input Reset at low level Min. 50 ms 100 ms is recommended ON/OFF DI On/Off input Low level pulse can change the On/Off state. 3.1.1 Design Requirements VBAT is the main power supply of the module. Its input voltage ranges from 3.5 V to 4.3 V and the preferable value is 3.9V.It supplies power for baseband controller and RF power amplifier. The performance of the VBAT power supply is a critical path to module's performance and stability. The peak input current at the VBAT pin can be up to 2 A when the signal is weak and the module works at the maximum transmitting power. The voltage will encounter a drop in such a situation. The module might restart if the voltage drops lower than 3.5 V. Figure 3-1 Current peaks and voltage drops Keep above 3.5 VKeep above 3.5 V3.5 V3.5 V0 ms0 ms 3.7 ms3.7 ms 7.4 ms7.4 ms 10.7 ms10.7 ms TT2.0 A2.0 AVoltageVoltageInput CurrentInput Current3.9 V3.9 V
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 8 Figure 3-2shows a recommended power supply design for the module. Figure 3-2 Capacitors used for the power supply In the circuit, you can use TVS at D1 to enhance the performance of the module during a burst. SMF5.0AG (Vrwm=5V&Pppm=200W) is recommended.A large bypass tantalum capacitor (220 μF or 100μF) or aluminum capacitor (470 μF or 1000 μF) is expected at C1 to reduce voltage drops during bursts together with C2 (10μF capacitor). In addition, you need to add 0.1 μF, 100 pF, and 33 pF filter capacitors to enhance the stability of the power supply. A controllable power supply is preferable if used in harsh conditions. The module might fail to reset in remote or unattended applications, or in an environment with great electromagnetic interference (EMI). You can use the EN pin on the LDO or DC/DC chipset to control the switch of the power supply as shown in Figure 3-3. MIC29302WU in the following figure is an LDO and outputs 3 A current to ensure the performance of the module. Figure 3-3 Reference design of power supply control The alternative way is to use a p-MOSFET to control the module's power, as shown in Figure 3-4. When the external MCU detects the exceptions such as no response from the module or the disconnection of GPRS, power off/on can rectify the module exceptions.In Figure 3-4, the module is powered on when GPRS_EN is set to high level. VCC_IN_5VGPRS_EN VBAT100 uFTAN 0.1 uFTVS5V 10 uF470uFTAN10K4.75KVOUTMIC29302WUENVIN ADJ0.1 uF 100pF 33pF
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 9 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 VCC_IN_3.9V - |VGS(th)|, where VGS(th) is the Gate Threshold Voltage, Q2 is not needed. Reference components: l Q1 can be IRML6401 or Rds(on) p-MOSFET which has higher withstand voltage and drain current. l Q2: a common NPN transistor, e.g. MMBT3904; or a digital NPN transistor, e.g. DTC123.If digital transistor is used, delete R1 and R2. l C3: 470 uF tantalum capacitor rated at 6.3V; or 1000 uF aluminum capacitor.If lithium battery is used to supply power, C3 can be 220 uF tantalum capacitor. Protection Place a TVS diode (VRWM=5 V) on the VBAT power supply to ground, especially in automobile applications. For some stable power supplies, zener diodes can decrease the power supply overshoot. MMSZ5231B1T1G from ONSEMI and PZ3D4V2 from Prisemi are options. Trace The trace width of primary loop lines for VBAT on PCB must be able to support the safe transmission of 2A current and ensure no obvious loop voltage decrease.Therefore, the trace width of VBAT loop line is required 2 mm and the ground should be as complete as possible. Separation As shown in Figure 3-1, the GPRSmodule works in burst mode that generates voltage drops on power supply. And furthermore this results in a 217Hz TDD noise through power (One of the way generating noise.Another way is through RF radiation). Analog parts, especially the audio circuits, are subjected to this noise, known as a "buzz noise" in GSM systems.To prevent other parts from being affected, it's better to use SGDVCC_IN_3.9V VBAT10K100K 33 pF10 uFGPRS_EN2K10K0.1 uFQ1R4C1 C2 C4 C5 C7R1R210 uF0.1 uFR3 Q2TVS5V 470 uFC3 C6100pF
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 10 separated power supplies.The module shall be supplied by an independent power, like a DC/DC or LDO. See Figure 3-5. DC/DC or LDO should output rated peak current larger than 2 A. The inductor used in Reference Design (b), should be a power inductor and have a very low resistance. 10 uH with average current ability greater than 1.2A and low DC resistance is recommended. Figure 3-5 Reference designs of separated power supply 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. EMC Considerations Place transient overvoltage protection components like TVS diode on power supply, to absorb the power surges. SMAJ5.0A/C could be a choice. 3.1.2 VDD_EXT It is recommended that VDD_EXT is only used for interface level transformation. VDD_EXT can output 2.8 V and 50 mA. It stops output after the module is shut down. 3.1.3 Power-On/OffControl 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. ON/OFF is a low level pulse active input, used to turn on or off the module. Power-On Procedure While the module is off, drive the ON/OFF pin to ground for at least 1.2 second and then release, the module will start. An unsolicited message (+MODEM:STARTUP) will be sent to host through UART port, indicating that the module is powered on and can respond to AT commands. When you design your program, you can use the unsolicited message (MODEM:STARTUP) to check whether the module is started or reset improperly.
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 11 Figure 3-6 Power-on procedure Power-Off Procedure While the module is on, drive the ON/OFF pin to ground for at least 500 ms and then release, the module will try to detach to network and normally 2 seconds later it will shut down. Another approach to turn off the module is using AT commands. For details, see M590 GPRS Module AT Commands. Figure 3-7 shows the power-off procedure of the module. Figure 3-7 Power-off procedure Power-On/Off Control Figure 3-8 shows a reference circuit for ON/OFF control with inverted control logic. VBATON/OFFVDD_EXTUART1.2s3s300 msVBATON/OFFVDD_EXTUART2 s500 ms
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 12 Figure 3-8 Reference circuit for power-on/off control Figure 3-9 Reference circuit for power-on/off controlled by high level In Figure 3-9, 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. Use a common NPN transistor, e.g. MMBT3904; or a digital NPN transistor, e.g. DTC123.If digital transistor is used, delete R1 and R2. l Level abnormalities at interfaces connected to the external MCU, especially the UART port, might affect the power-on procedure of the module. For example, when a module is turned on, the IO ports of the MCU are still in output status because they have not been initialized completely. The module might fails to start if the UTXD signal (output pin) is forced to pull up or down. l The better way to rescue the module from abnormal condition, is to apply a power OFF-ON procedure, rather than using the ON/OFF control signal. In fact ON/OFF signal is software-dependent. GPRS ModuleON/OFFTVSS 1USER_ON GPRS ModuleON/OFF4.7K47KR1R2
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 13 3.1.4 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. Please refer to Figure 3-10. Figure 3-10 Reset circuitwith triode separating 3.2 UART Table 3-2 UART Signal I/O Function Description Remarks URXD DI UART data receive UTXD DO UART data transmit UART is used for AT commands, data sending/receiving, firmware updating, etc. Figure 3-11shows the signal connection between the module (DCE) and the terminal (DTE). Figure 3-11 Signal connection between DCE and DTE The UART of M590works 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. RESETVDD_EXT4.7K47K GPRS ModuleDCEURXDUTXDDTEUTXDURXD
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 14 If the UART is interfacing with a MCU that has 3.3V logic levels, it is recommended that you add a level shifting circuit outside of the module. Figure 3-12 Recommended circuit for the communication between 3.3V MCU and UART In Figure 3-12, 100 pF filter capacitor should be placed near the receive pin of the module. Resistance (200 Ω to 470 Ω) and capacity (100 pF to 470 pF) can be selected based on the tested signal wave. Great serial resistance and filter capacity will decrease the signal level, resulting in great signal wave distortion and the low adaptable UART communication baudrate. RB521S-30TE-61, RB521SM-30GJT2R, and LRB521S-30T1G are recommended for separating diode. When the external MCU adopts 5 V IO system, level shifting is required for both UART receive and transmit.Figure 3-13shows a reference circuit. Figure 3-13 Recommended circuit for the communication between 5V MCU and UART Module_URXDModule_UTXDVDD_EXT0.1 uF47KRB521S200 33 pF33 pFMCU_UTXDMCU_URXDINPUT OUTPUTVCC_IN VCC_OUT4.7K 10KQ1R2 R3
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 15 In Figure 3-13, INPUT is connected to UTXD of the MCU and VCC_IN is connected to the 5 V power supply of the MCU. OUTPUT is connected to URXD of the module and VCC_OUT is connected to VDD_EXT(2.8V) of the module.If the circuit is far away from the VDD_EXTpin, add a 0.1 μF decoupling capacitor to VCC_OUT. Level shifting between URXD of the MCU and UTXD of the module can be implemented in the same way. The pull-up resistor R3 ranges from 4.7 K to 10 K; R2 ranges from 2 K to 10 K.Resistors are selected based on the voltage of the power supply and UART baudrate. You can select resistors with great resistance to reduce the power consumption when the power supply has great voltage or the baudrate is low. But, the resistance will affect the quality of the square wave.In addition, the circuit performance is affected by the signal traces during PCB layout. It is recommended that you choose a high-speed NPN transistor because the Q1 switch rate will affect the wave quality after level shifting.MMBT3904 or MMBT2222 is recommended. Avoid data produced at UART when the module is powered on. You are advised to send data to the UART 3 seconds after the module is powered on so that the module would not respond wrongly. 3.3 DTR and RING Table 3-3 DTR and RING pins Signal I/O Function Remarks DTR DI Signal for controlling sleep mode Left disconnected if not used RING DO Ring output Left disconnected if not used 3.3.1 DTR Pin Generally DTR is used for sleep mode control. It works with AT commands. For details, see M590GPRS Module AT CommandSet.Based on the setting of the selected mode, pulling DTR low will bring the module into sleep mode. In this mode, the idle current is less than 2 mA, the module can also respond to the incoming call, SMS, and GPRS data.The host MCU can also control the module to exit sleep mode by controlling DTR. Process of entering the sleep mode: 1. Keep DTR high level in working mode. Activate the sleep mode by using the AT+ENPWRSAVE=1command. 2. Pull DTR low, and the module will enter sleep mode, but only after process and pending data finished. 3. In sleep mode, the module can be woken up by the events of incoming voice call, received data, or SMS. Meanwhile the module will send out the unsolicited messages by the interface of RING or UART. 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.
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 16 4. Pull DTR high, the module will exit from sleep mode actively, and furthermore enable the UART. Thus the voice call, received data, or SMS can be processed through UART.After processing finished pull it low again, to take the module back to sleep mode. 3.3.2 RING Signal Indicator l Calling: Once a voice call is coming, UART output "RING" character strings and meanwhile the RING pin outputs 30 ms low pulses at 5s period. After the call is answered, the high level restores. Figure 3-14 RING indicator for incoming call l SMS: Upon receipt of SMS, the module outputs one 35ms low pulse. Figure 3-15 RING indicator for SMS 3.4 SIM Card Interface Table 3-4 SIM Card Interface Signal I/O Function Description Remarks VSIM P SIM card power supply output 1.8V/3.0V SIM_CLK DO SIM card clock output SIM_RST DO SIM card reset output SIM_DATA DI/O SIM card data IO Internal pull-up M590 supports 3.0 V and 1.8 V SIM cards. VSIM supplies power for SIM card with 30mA. SIM_DATA is internally pulled up by a resistor. External pull-up resistor is not needed. SIM_CLK can work at several frequenciesat 3.25MHz typically. 5s30 ms 30 ms35 ms
M590 GPRS Module Hardware User GuideCopyright © Neoway Technology Co., LtdFigure 3-16 ESD protectors, such as ESD diodes (lower than 33 pF) or signals, especially in automotive electronics or other applications with badly ESD.replace ESD diodes with 27 pF to 33 pF grounding capacitors. be close to SIM card. If you use 6-pin SIM card sockets, MCPencapsulation. Figure 3 20 20 20 SIM_DATASIM_CLKSIM_RSTVSIMGPRS ModuleGPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd Reference design of SIM card interface 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.In other applications, replace ESD diodes with 27 pF to 33 pF grounding capacitors. The ESD diodes or small capacitors should , MCP-C713(H2.8) is recommended. Figure 3-17 shows its Figure 3-17 Reference of SIM card socket 1 uFCLKRSTVCCGNDSIM卡DATA 17 ESD varistors, are recommended on the SIM In other applications, The ESD diodes or small capacitors should shows its VPPGNDDATA
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 18 SIM card is sensitive to GSM TDD noise and RF interference. So, the PCB design should meet the following requirements: l The antenna should be installed far away from the SIM card and SIM card traces, especially to the build-in antenna. l The SIM traces on the PCB should be as short as possible and shielded with GND copper. l The ESD diodes or small capacitors should be closed to SIM card on the PCB. 3.5 Running LED Indicator Table 3-5 LED indicator Signal I/O Function Remarks LIGHT DO Indicates running status 2.8 V output, max. 4 mA High level drives the LED indicator The LIGHT pin can output a 4 mA current and 2.8 V voltage, therefore the LED can be directly connected to this pin with a resistor in series.For better luminance, drive the LED with a transistor instead. Figure 3-18 LED indicator When the module is running, the LED indicator is driven by the LIGHT to indicate different module status with its various blink behaviors. You can set the blink mode by AT commands. For more details, see M590 GPRS Module AT Command Set.LIGHTGPRS Module 1K LIGHTGPRS Module10KVCC4704.7K
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 19 3.6 RF Interface 3.6.1 RF Design and PCB Layout A 50 Ω antenna is required. VSWR ranges from 1.1 to 1.5. The antenna should be well matched to achieve best performance. It should be installed far away from high speed logic circuits, DC/DC power, or any other strong disturbing sources. For multiple-layer PCB, the trace between the antenna pad of module and the antenna connector, should have a 50 Ω characteristic impedance, and be as short as possible. The trace should be surrounded by ground copper. Place plenty of via holes to connect this ground copper to main ground plane, at the copper edge. If the trace between the module and connector has to be longer, or built-in antenna is used, a π-type matching circuit should be needed, as shown in Figure 3-19. The types and values of C1, L1, and L2 should be verified by testing using network analyzer instrument. If the characteristic impedance is well matched, and VSWR requirement is met, just use a 0 Ω resistor for L1 and leave C1, L2 un-installed. Avoid any other traces crossing the antenna trace on neighboring layer. Figure 3-19 Reference design for antenna interface 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 1mm; the RF is 1 mm away from the ground. Figure 3-20 shows a two-layer board application. The RF is connected to GSC RF connector through traces on PCB, which is connected to the antenna via cable. Remove the copper from the area of 2 mm in diameter around the RF testing point. Dig ground holes as many as possible. Separate this area from the copper-removing area of the 21st pin by ground. Ensure complete ground around the 20th pin in case that its signal is affected by other high-speed signals (SIM signal, e.g.). GPRS ModuleANTC1GPRS_ANTL2L1
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 20 Figure 3-20 RF layout reference If you use RF feeder to connect the module and the antenna (pin 21 is not used), remove the pad of the 21st pin and its adjuncts. Refer to Figure 3-21. Figure 3-21 Reference RF design when pin 21 is not used Ensure complete ground at both sides of the 20th pin. Avoid ground at only one side. The RF route should be as short and smooth as possible and at a width of 1 mm; the RF is 1 mm away from the ground. Separate the copper-removing area from the RF route by ground. Remove the copper from the top layer of the RF testing point (2mm in diameter). Dig ground holes around this are.
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 21 3.6.2 Recommended RF Connection If you adopts RF cables for connections, the GSC RF connector MM9329-2700RA1 from Murata is recommended. Figure 3-22 shows the encapsulation specifications. Figure 3-22 Encapsulation specifications of Murata RF connector
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 22 4 Electric Features and Reliability 4.1 Electric Feature Table 4-1 Electric feature of the module Parameter Minimum Value Typical Value Maximum Value VBAT Vin 3.5V 3.9V 4.3V Iin / / 2A VDD_EXT Vout / 2.8V / Iout / / 50mA DIO Vout 2.3V 2.8V 3.1V Iout / / 4mA Vin -0.3V 0V 0.6V Iin / / 22.5uA If the voltage is too low, the module might fail to start. If the voltage is too high or there is a voltage burst during the startup, the module might be damaged permanently. If you use LDO or DC-DC to supply power for the module, ensure that it output at least 2 A current. 4.2 Temperature Table 4-2 Temperature Feature Module Status Minimum Value Typical Value Maximum Value Working -40℃ 25℃ 85℃ Storage -45℃ 90℃ If the module works in temperature exceeding the thresholds, its RF performance (e.g. frequency deviation or phase deviation) might be worse but it can still work properly.
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 23 4.3 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. 18mA Off leakage current Power on the module or use AT command to shut the module down. 50uA Average network searching current Set the instrument. Start the module. Wait until the module registers the instrument. 60mA Sleep mode On a live network, the module registers the network and then enters the sleep mode. 1.7mA Set the instrument properly (DRX=9) 1 mA Voice service Maximum power level in full rate mode EGSM900 197.8mA DCS1800 152.6mA GPRS class 12 4Up/1Down@Gamma=3 EGSM900 417.6mA DCS1800 303.1mA 1Up/4Down@Gamma=3 EGSM900 186.8 mA DCS1800 144.2mA The data in the above table is typical values obtained during tests in lab. It might be a little bit different in manufacturing. Also, the test results might be various due to different settings or testing methods. 4.4 ESDProtection Electronics need to pass sever ESD tests. The following table shows the ESD capability of key pins of our module. It is recommended that you add ESD protection to those pins in accordance to the application to ensure your product quality when designing your products. Humility: 45% Temperature: 25℃ Table 4-4 ESD feature of the module Testing Point Contact Discharge Air Discharge VBAT ±8KV ±15KV GND ±8KV ±15KV
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 24 ANT ±8KV ±15KV Cover ±8KV ±15KV URXD/UTXD ±4KV ±8KV Others ±4KV ±8KV
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 25 5 RF Features 5.1 Work Band Table 5-1 Work band Work Band Uplink Downlink EGSM900 880~915MHz 925~960MHz DCS1800 1710~1785MHz 1805~1880MHz 5.2 Transmitting Power and Receiving Sensitivity 5.2.1 Transmitting Power Table 5-2 Transmitting power (EGSM900) PCL Transmitting Power Threshold Range 5 33dBm ±2 dBm 6 31dBm ±3dBm 7 29 dBm ±3dBm 8 27 dBm ±3dBm 9 25 dBm ±3dBm 10 23 dBm ±3dBm 11 21 dBm ±3dBm 12 19 dBm ±3dBm 13 17 dBm ±3dBm 14 15 dBm ±3dBm 15 13 dBm ±5dBm 16 11 dBm ±5dBm 17 9 dBm ±5dBm 18 7 dBm ±5dBm 19 5 dBm ±5dBm Table 5-3 Transmitting power (DCS1800) PCL Transmitting Power Threshold Range 0 30 dBm ±2 dBm 1 28 dBm ±3dBm
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 26 2 26 dBm ±3dBm 3 24 dBm ±3dBm 4 22 dBm ±3dBm 5 20 dBm ±3dBm 6 18 dBm ±3dBm 7 16 dBm ±3dBm 8 14 dBm ±3dBm 9 12 dBm ±3dBm 10 10 dBm ±4Bm 11 8 dBm ±4Bm 12 6 dBm ±4Bm 13 4 dBm ±4dBm 14 2 dBm ±5dBm 15 0 dBm ±5 dBm 5.2.2 Receiving Sensitivity Band Typical GSM800&EGSM900 <-107 dBm DCS1800&PCS1900 <-107 dBm The data in the above tables is obtained by connecting the module to RF test instrument (e.g. CMU200, CWM500, or Agilent8960) in lab tests. It is for reference only.
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 27 6 Mounting the Module onto the Application Board M590 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: l Only one flow is supported. l Quality of the solder joint depends on the solder volume. Minimum of 0.15mm stencil thickness is recommended. l Use bigger aperture size of the stencil than actual pad size. l Use a low-residue, no-clean type solder paste. 7 Package M590modules are packaged in sealed bags on delivery to guarantee a long shelf life. Package the modules again in case of opening for any reasons. Neoway adopts trays to hold our modules to facilitate mounting. You can just put the tray in fixed direction on your machine. For more details about the storage and mounting of our modules, refer toReflow Soldering Guide for Neoway SMD Modules V1.2.
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 28 8 Abbreviations ADC Analog-Digital Converter AFC Automatic Frequency Control AGC Automatic Gain Control AMR Acknowledged multirate (speech coder) CSD Circuit Switched Data CPU Central Processing Unit DAI Digital Audio interface DAC Digital-to-Analog Converter DCE Data Communication Equipment DSP Digital Signal Processor DTE Data Terminal Equipment DTMF Dual Tone Multi-Frequency DTR Data Terminal Ready EFR Enhanced Full Rate EGSM Enhanced GSM EMC Electromagnetic Compatibility EMI Electro Magnetic Interference ESD Electronic Static Discharge ETS European Telecommunication Standard FDMA Frequency Division Multiple Access FR Full Rate GPRS General Packet Radio Service GSM Global Standard for Mobile Communications HR Half Rate IC Integrated Circuit IMEI International Mobile Equipment Identity LCD Liquid Crystal Display LED Light Emitting Diode MS Mobile Station PCB Printed Circuit Board PCS Personal Communication System
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 29 RAM Random Access Memory RF Radio Frequency ROM Read-only Memory RMS Root Mean Square RTC Real Time Clock SIM Subscriber Identification Module SMS Short Message Service SRAM Static Random Access Memory TA Terminal adapter TDMA Time Division Multiple Access UART Universal asynchronous receiver-transmitter VSWR Voltage Standing Wave Ratio Modular Approal: The M590 module is designed to comply with the FCC statement. FCC ID is PJ7-125X. The host system using M590, should have label indicated it contain modular’s FCC ID PJ7-125X. This radio module must not installed to co-locate and operating simultaneously with other radios in host system , additional testing and equipment authorization may be required to operating simultaneously with other radio. RF warning for Mobile device: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body. § 15.19 Labelling requirements. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. § 15.21 Information to user. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. § 15.105 Information to the user. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful in
M590 GPRS Module Hardware User Guide Copyright © Neoway Technology Co., Ltd 30 terference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -Reorient or relocate the receiving antenna. -Increase the separation between the equipment and receiver. -Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -Consult the dealer or an experienced radio/TV technician for help.

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