EC25-A User Manual LTE Module Series Rev. EC25-A_User_Manual_V1.0 Date: 2016-03-28 www.quectel.
LTE Module EC25-A User Manual Our aim is to provide customers with timely and comprehensive service. For any assistance, please contact our company headquarters: Quectel Wireless Solutions Co., Ltd. Office 501, Building 13, No.99, Tianzhou Road, Shanghai, China, 200233 Tel: +86 21 5108 6236 Mail: info@quectel.com Or our local office, for more information, please visit: http://www.quectel.com/support/salesupport.aspx For technical support, to report documentation errors, please visit: http://www.quectel.
LTE Module EC25-A User Manual About the Document History Revision Date Author Description V1.
LTE Module EC25-A User Manual Contents About the Document ................................................................................................................................... 2 Contents ....................................................................................................................................................... 3 Table Index ................................................................................................................................................
LTE Module EC25-A User Manual 3.11. 3.12. 3.13. 3.14. 3.15. 3.16. UART Interface ....................................................................................................................... 36 PCM and I2C Interface........................................................................................................... 38 ADC Function ......................................................................................................................... 41 Network Status Indication ...........
LTE Module EC25-A User Manual Table Index TABLE 1: EC25 SERIES FREQUENCY BANDS ........................................................................................ 9 TABLE 2: EC25 KEY FEATURES .............................................................................................................. 10 TABLE 3: IO PARAMETERS DEFINITION ................................................................................................ 16 TABLE 4: PIN DESCRIPTION .........................................
LTE Module EC25-A User Manual Figure Index FIGURE 1: FUNCTIONAL DIAGRAM ........................................................................................................ 12 FIGURE 2: PIN ASSIGNMENT (TOP VIEW) ............................................................................................. 15 FIGURE 3: UART SLEEP APPLICATION .................................................................................................. 22 FIGURE 4: SLEEP APPLICATION WITH USB REMOTE WAKEUP ............
LTE Module EC25-A User Manual 1 Introduction This document defines the EC25 module and describes its air interface and hardware interface which are connected with your application. This document can help you quickly understand module interface specifications, electrical and mechanical details, as well as other related information of EC25 module. Associated with application notes and user guide, you can use EC25 module to design and set up mobile applications easily. 1.1.
LTE Module EC25-A User Manual Cellular terminals or mobiles operating over radio frequency signal and cellular network cannot be guaranteed to connect in all conditions, for example no mobile fee or with an invalid SIM card. While you are in this condition and need emergent help, please remember using emergency call. In order to make or receive a call, the cellular terminal or mobile must be switched on and in a service area with adequate cellular signal strength.
LTE Module EC25-A User Manual 2 Product Concept 2.1. General Description EC25 is a series of FDD-LTE /TDD-LTE /WCDMA/TD-SCDMA/CDMA/GSM wireless communication module with receive diversity, which provides data connectivity on FDD-LTE, TDD-LTE, DC-HSPA+, HSPA+, HSDPA, HSUPA, WCDMA, TD-SCDMA, CDMA, EDGE and GPRS networks. It can also provide GNSS1) and voice functionality2) for your specific application. EC25 contains four variants: EC25-E, EC25-A, EC25-V and EC25-AUT.
LTE Module EC25-A User Manual 80 LCC signal pads and 64 other pads. 2.2. Directives and Standards 2.2.1. FCC Statement Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. This device complies with part 15 of the FCC Rules.
LTE Module EC25-A User Manual SMS cell broadcast SMS storage: ME by default USIM Interface Support USIM/SIM card: 1.8V, 3.
LTE Module EC25-A User Manual 2.4. Functional Diagram The following figure shows a block diagram of EC25 and illustrates the major functional parts. Power management Baseband DDR+NAND flash Radio frequency Peripheral interface ANT_MAIN ANT_GNSS ANT_DIV Switch SAW Switch Duplex LNA SAW VBAT_RF APT PA PRx DRx Tx NAND DDR2 SDRAM Transceiver IQ VBAT_BB PMIC PWRKEY Control Control Baseband RESET_N ADCs 19.
LTE Module EC25-A User Manual 2.5. Evaluation Board In order to help you to develop applications with EC25, Quectel supplies an evaluation board (EVB), USB data cable, earphone, antenna and other peripherals to control or test the module.
LTE Module EC25-A User Manual 3 Application Interface 3.1. General Description EC25 is equipped with an 80-pin SMT pad plus 64-pin ground pads and reserved pads that can be connected to cellular application platform. Sub-interfaces included in these pads are described in detail in the following chapters: Power supply USIM interface USB interface UART interface PCM interface ADC interface Status indication 3.2.
LTE Module EC25-A User Manual GND RESERVED 57 56 55 18 VBAT_RF RESERVED 99 85 90 95 119 132 120 133 121 134 122 135 123 136 124 137 125 138 126 139 127 140 58 17 VBAT_RF USIM_RST 59 16 VBAT_BB USIM_CLK 60 15 VBAT_BB USIM_DATA 61 14 STATUS USIM_VDD 62 13 RI USIM_PRESENCE 63 12 DCD DBG_TXD 103 64 11 131 108 65 DBG_RXD 118 104 109 100 86 91 96 GND 53 GND 52 GND 51 GND 50 GND 49 ANT_MAIN 48 GND 143 RESERVED 83 80 77 74 105 110
LTE Module EC25-A User Manual 3.3. Pin Description The following tables show the EC25’s pin definition. Table 3: IO Parameters Definition Type Description IO Bidirectional input/output DI Digital input DO Digital output PI Power input PO Power output AI Analog input AO Analog output OD Open drain Table 4: Pin Description Power Supply Pin Name VBAT_BB VBAT_RF Pin No.
LTE Module EC25-A User Manual 85~112 Turn on/off Pin Name I/O Description DC Characteristics DI Turn on/off the module. VIHmax=2.1V VIHmin=1.3V VILmax=0.5V DI Reset the module. VIHmax=2.1V VIHmin=1.3V VILmax=0.5V I/O Description DC Characteristics Comment OD Indicate the module operating status. The drive current should be less than 0.9mA. Require external pull-up. If unused, keep it open. DO Indicate the module network registration mode. VOHmin=1.35V VOLmax=0.45V 1.8V power domain.
LTE Module EC25-A User Manual For 3.0V USIM: Vmax=3.05V Vmin=2.7V IOmax=50mA USIM_DATA USIM_CLK USIM_RST USIM_ PRESENCE 15 16 17 13 IO DO DO Data signal of USIM card. Clock signal of USIM card. Reset signal of USIM card. For 1.8V USIM: VILmax=0.6V VIHmin=1.2V VOLmax=0.45V VOHmin=1.35V For 3.0V USIM: VILmax=1.0V VIHmin=1.95V VOLmax=0.45V VOHmin=2.55V For 1.8V USIM: VOLmax=0.45V VOHmin=1.35V For 3.0V USIM: VOLmax=0.45V VOHmin=2.55V For 1.8V USIM: VOLmax=0.45V VOHmin=1.35V For 3.
LTE Module EC25-A User Manual CTS RTS 64 65 DO DI Clear to send. VOLmax=0.45V VOHmin=1.35V 1.8V power domain. If unused, keep it open. Request to send. VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. If unused, keep it open. 1.8V power domain. Pull-up by default. Low level wakes up the module. If unused, keep it open. DTR 66 DI Data terminal ready, sleep mode control. VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V TXD 67 DO Transmit data. VOLmax=0.45V VOHmin=1.
LTE Module EC25-A User Manual PCM_IN PCM_OUT PCM_SYNC 24 25 26 DI DO IO PCM data input. VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. If unused, keep it open. PCM data output. VOLmax=0.45V VOHmin=1.35V 1.8V power domain. If unused, keep it open. PCM data frame sync signal. VOLmax=0.45V VOHmin=1.35V VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. In master mode, it is an output signal. In slave mode, it is an input signal. If unused, keep it open.
LTE Module EC25-A User Manual WAKEUP_IN W_DISABLE# AP_READY 1 4 2 Sleep mode control. VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. Pull-up by default. Low level wakes up the module. If unused, keep it open. DI Airplane mode control. VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. Pull-up by default. In low voltage level, module can enter into airplane mode. If unused, keep it open. DI Application processor sleep state detection. VILmin=-0.
LTE Module EC25-A User Manual Sleep Mode In this mode, the current consumption of the module will be reduced to the minimal level. During this mode, the module can still receive paging message, SMS, voice call and TCP/UDP data from the network normally. Power Down Mode In this mode, the power management unit shuts down the power supply. Software is not active. The serial interface is not accessible. Operating voltage (connected to VBAT_RF and VBAT_BB) remains applied. 3.5. Power Saving 3.5.1.
LTE Module EC25-A User Manual Refer to AT command AT+QCFG=“apready” for details. 3.5.1.2. USB Application with USB Remote Wakeup Function If host supports USB suspend/resume and remote wakeup function, the following part will show the sleep application. There are three preconditions to let the module enter into the sleep mode. Execute AT command AT+QSCLK=1 to enable the sleep mode. Ensure the DTR is held in high level or keep it open.
LTE Module EC25-A User Manual state. The following figure shows the connection between the module and the host. Module Host VDD USB_VBUS USB_DP USB_DP USB_DM USB_DM AP_READY GPIO RI EINT GND GND Figure 5: Sleep Application with RI Sending data to EC25 through USB will wake up the module. When EC25 has URC to report, RI signal will wake up the host. 3.5.1.4.
LTE Module EC25-A User Manual Opening power switch to supply power to USB_VBUS will wake up the module. NOTE You should pay attention to the level match shown in dotted line between module and host. Refer to document [1] for more details about EC25 power management application. 3.5.2. Airplane Mode When the module enters into airplane mode, the RF function does not work, and all AT commands correlative with RF function will be inaccessible. This mode can be set with the following ways.
LTE Module EC25-A User Manual Table 6: VBAT and GND Pins Pin Name Pin No. Description Min. Typ. Max. Unit VBAT_RF 57, 58 Power supply for module RF part. 3.3 3.8 4.3 V VBAT_BB 59, 60 Power supply for module baseband part. 3.3 3.8 4.3 V GND 8, 9, 19, 22, 36, 46, 48, 50~54, 56, 72, 85~112 Ground. - 0 - V 3.6.2. Decrease Voltage Drop The power supply range of the module is from 3.3V to 4.3V. Make sure the input voltage will never drop below 3.3V.
LTE Module EC25-A User Manual VBAT VBAT_RF VBAT_BB + D1 5.1V C2 C3 C4 100nF 33pF 10pF C1 100uF C5 + 100uF C6 C7 C8 100nF 33pF 10pF Module Figure 8: Star Structure of the Power Supply 3.6.3. Reference Design for Power Supply The power design for the module is very important, as the performance of the module largely depends on the power source. The power supply is capable of providing sufficient current up to 2A at least.
LTE Module EC25-A User Manual 3.6.4. Monitor the Power Supply You can use the AT+CBC command to monitor the VBAT_BB voltage value. For more details, please refer to document [2]. 3.7. Turn on and off Scenarios 3.7.1. Turn on Module Using the PWRKEY The following table shows the pin definition of PWRKEY. Table 7: PWRKEY Pin Description Pin Name PWRKEY Pin No. 21 Description DC Characteristics Turn on/off the module. VIHmax=2.1V VIHmin=1.3V VILmax=0.
LTE Module EC25-A User Manual S1 PWRKEY TVS Close to S1 Figure 11: Turn on the Module Using Keystroke The turn on scenario is illustrated in the following figure. NOTE VBAT PWRKEY ≥ 100ms VIH ≥ 1.3V VIL ≤ 0.5V RESET_N TBD STATUS (OD) TBD UART Inactive Active TBD USB Inactive Active Figure 12: Timing of Turning on Module NOTE Make sure that VBAT is stable before pulling down PWRKEY pin. The time between them is no less than 30ms.
LTE Module EC25-A User Manual 3.7.2. Turn off Module The following procedures can be used to turn off the module: Normal power down procedure: Turn off the module using the PWRKEY pin. Normal power down procedure: Turn off the module using command AT+QPOWD. 3.7.2.1. Turn off Module Using the PWRKEY Pin Driving the PWRKEY to a low level voltage, the module will execute power-down procedure after the PWRKEY is released. The power-down scenario is illustrated in the following figure.
LTE Module EC25-A User Manual Table 8: RESET_N Pin Description Pin Name RESET_N Pin No. 20 Description DC Characteristics Reset the module. VIHmax=2.1V VIHmin=1.3V VILmax=0.5V Comment The recommended circuit is similar to the PWRKEY control circuit. You can use an open drain/collector driver or button to control the RESET_N. RESET_N TBD 4.
LTE Module EC25-A User Manual VBAT ≤Treset_max ≥Treset_min VIH ≥ 1.3V RESET_N Module Status VIL ≤ 0.5V RUNNING RESETTING RUNNING Figure 16: Timing of Resetting Module NOTES 1. 2. Use the RESET_N only when turning off the module by the command AT+QPOWD and the PWRKEY pin failed. Ensure that there is no large capacitance on the PWRKEY and RESET_N pins. 3.9. USIM Card Interface The USIM card interface circuitry meets ETSI and IMT-2000 SIM interface requirements. Both 1.8V and 3.
LTE Module EC25-A User Manual EC25 supports USIM card hot-plug via the USIM_PRESENCE pin. It supports low level and high level detections, which is disabled by default. For details, refer to document [2] about the command AT+QSIMDET. The following figure shows the reference design of the 8-pin USIM connector.
LTE Module EC25-A User Manual criteria below in the USIM circuit design: Keep layout of USIM card as close as possible to the module. Assure the length of trace is less than 200mm. Keep USIM card signal away from RF and VBAT alignment. Assure the ground between the module and the USIM connector short and wide. Keep the width of ground and USIM_VDD no less than 0.5mm to maintain the same electric potential.
LTE Module EC25-A User Manual Test Points Minimize this stub Module VDD R3 NM_0R R4 NM_0R MCU ESD Array USB_VBUS USB_DM USB_DP R1 0R R2 0R Close to Module GND USB_DM USB_DP GND Figure 19: Reference Circuit of USB Application In order to meet USB data line signal integrity, components R1, R2, R3 and R4 must be placed close to the module, and then these resistors should be placed close to each other. The extra stubs of trace must be as short as possible.
LTE Module EC25-A User Manual 3.11. UART Interface The module provides two UART interfaces: main UART interface and debug UART interface. The following shows the different features. Main UART interface supports 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600bps baud rate, and the default is 115200bps. This interface can be used for data transmission and AT communication. Debug UART interface supports 115200bps baud rate. It can be used for Linux console and log output.
LTE Module EC25-A User Manual Table 13: Logic Levels of Digital I/O Parameter Min. Max. Unit VIL -0.3 0.6 V VIH 1.2 2.0 V VOL 0 0.45 V VOH 1.35 1.8 V The module provides 1.8V UART interface. A level translator should be used if your application is equipped with a 3.3V UART interface. A level translator TXS0108EPWR provided by Texas Instrument is recommended. The following figure shows the reference design. VDD_EXT VCCA 0.1uF VCCB OE 0.
LTE Module EC25-A User Manual VDD_EXT MCU/ARM 4.7K 1nF VDD_EXT 10K Module /TXD RXD /RXD TXD 1nF 10K VCC_MCU 4.7K VDD_EXT /RTS /CTS GPIO EINT GPIO GND RTS CTS DTR RI DCD GND Figure 21: Reference Circuit with Transistor Circuit NOTE Transistor circuit solution is not suitable for high baud rates exceeding 460Kbps. 3.12.
LTE Module EC25-A User Manual 125us PCM_CLK 1 2 255 256 PCM_SYNC MSB LSB MSB MSB LSB MSB PCM_OUT PCM_IN Figure 22: Primary Mode Timing 125us 1 PCM_CLK 2 15 16 PCM_SYNC MSB LSB MSB LSB PCM_OUT PCM_IN Figure 23: Auxiliary Mode Timing The following table shows the pin definition of PCM and I2C interface which can be applied on audio codec design. Table 14: Pin Definition of PCM and I2C Interface Pin Name Pin No. I/O Description Comment PCM_IN 24 DI PCM data input 1.
LTE Module EC25-A User Manual PCM_OUT 25 DO PCM data output 1.8V power domain PCM_SYNC 26 IO PCM data frame sync signal 1.8V power domain PCM_CLK 27 IO PCM data bit clock 1.8V power domain I2C_SCL 41 OD I2C serial clock Require external pull-up to 1.8V I2C_SDA 42 OD I2C serial data Require external pull-up to 1.8V Clock and mode can be configured by AT command, and the default configuration is master mode using short sync data format with 2048kHz PCM_CLK and 8kHz PCM_SYNC.
LTE Module EC25-A User Manual 3.13. ADC Function The module provides two analog-to-digital converters (ADC). Using AT command AT+QADC=0 can read the voltage value on ADC0 pin. Using AT command AT+QADC=1 can read the voltage value on ADC1 pin. For more details of these AT commands, please refer to document [2]. In order to improve the accuracy of ADC, the trace of ADC should be surrounded by ground. Table 15: Pin Definition of the ADC Pin Name Pin No.
LTE Module EC25-A User Manual mode. NET_STATUS 6 DO Indicate the module network activity status. 1.
LTE Module EC25-A User Manual Table 19: Pin Definition of STATUS Pin Name STATUS Pin No. 61 I/O Description Comment OD Indicate the module operation status Require external pull-up The following figure shows different design circuit of STATUS, you can choose either one according to your application demands. VBAT VDD_MCU 10K 2.2K STATUS Module MCU_GPIO STATUS Module Figure 26: Reference Circuit of the STATUS 3.16.
LTE Module EC25-A User Manual Table 20: Behavior of the RI State Response Idle RI keeps high level URC RI outputs 120ms low pulse when new URC returns The RI behavior can be changed by command AT+QCFG=“urc/ri/ring”. Refer to document [2] for details.
LTE Module EC25-A User Manual 4 GNSS Receiver 4.1. General Description EC25 includes a fully integrated global navigation satellite system solution that supports Gen8C-Lite of Qualcomm (GPS, GLONASS, BeiDou, Galileo and QZSS). EC25 supports standard NMEA-0183 protocol, and outputs NMEA sentences with 1Hz via USB interface by default. By default, EC25 GNSS engine is switched off. It has to be switched on with AT command.
LTE Module EC25-A User Manual Hot start @open sky Accuracy (GNSS) CEP-50 Autonomous TBD s XTRA enabled TBD s Autonomous @open sky TBD m NOTES 1. 2. 3. Tracking sensitivity: the lowest GPS signal value at the antenna port for which the module can keep on positioning for 3 minutes. Reacquisition sensitivity: the lowest GPS signal value at the antenna port for which the module can fix position again within 3 minutes after loss of lock.
LTE Module EC25-A User Manual 5 Antenna Interface EC25 antenna interface includes a main antenna, an Rx-diversity antenna which is used to resist the fall of signals caused by high speed movement and multipath effect, and a GNSS antenna. The antenna interface has an impedance of 50ohm. 5.1. Main/Rx-diversity Antenna Interface 5.1.1. Pin Definition The main antenna and Rx-diversity antenna pins definition are shown below. Table 22: Pin Definition of the RF Antenna Pin Name Pin No.
LTE Module EC25-A User Manual 5.1.3. Reference Design The reference design of ANT_MAIN and ANT_DIV antenna is shown as below. It should reserve a π-type matching circuit for better RF performance. The capacitors are not mounted by default. Main antenna Module R1 ANT_MAIN 0R C1 C2 NM NM Diversity antenna R2 ANT_DIV 0R C3 C4 NM NM Figure 27: Reference Circuit of Antenna Interface NOTES 1. 2.
LTE Module EC25-A User Manual Table 24: Pin Definition of GNSS Antenna Pin Name Pin No. I/O Description Comment ANT_GNSS 47 AI GNSS antenna 50ohm impedance Table 25: GNSS Frequency Type Frequency Unit GPS/Galileo/QZSS 1575.42 ± 1.023 MHz GLONASS 1597.5 ~ 1605.8 MHz BeiDou 1561.098 ± 2.046 MHz The reference design of GNSS antenna is shown as below. VDD GNSS Antenna 10R 0.1uF Module 47nH 100pF ANT_GNSS NM NM Figure 28: Reference Circuit of GNSS Antenna NOTES 1. 2.
LTE Module EC25-A User Manual 5.3. Antenna Installation 5.3.1. Antenna Requirement The following table shows the requirements on main antenna, Rx-diversity antenna and GNSS antenna. Table 26: Antenna Requirements Type Requirements GNSS Frequency range: 1561 - 1615MHz Polarization: RHCP or linear VSWR: < 2 (Typ.) Passive antenna gain: > 0dBi Active antenna noise figure: < 1.5dB Active antenna gain: > -2dBi Active antenna embedded LNA gain: 20dB (Typ.) Active antenna total gain: > 18dBi (Typ.
LTE Module EC25-A User Manual Figure 29: Dimensions of the UF.L-R-SMT Connector (Unit: mm) You can use U.FL-LP serial connector listed in the following figure to match the UF.L-R-SMT. Figure 30: Mechanicals of UF.
LTE Module EC25-A User Manual The following figure describes the space factor of mated connector. Figure 31: Space Factor of Mated Connector (Unit: mm) For more details, please visit http://www.hirose.com.
LTE Module EC25-A User Manual 6 Electrical, Reliability and Radio Characteristics 6.1. Absolute Maximum Ratings Absolute maximum ratings for power supply and voltage on digital and analog pins of the module are listed in the following table. Table 27: Absolute Maximum Ratings Parameter Min. Max. Unit VBAT_RF/VBAT_BB -0.3 4.7 V USB_VBUS -0.3 5.5 V Peak Current of VBAT_BB 0 0.8 A Peak Current of VBAT_RF 0 1.8 A Voltage at Digital Pins -0.3 2.
LTE Module EC25-A User Manual Parameter Description Conditions Min. VBAT_RF min/max values, including voltage drop, ripple and spikes. Voltage drop during transmitting burst Maximum power control level on GSM900. IVBAT Peak supply current (during transmission slot) Maximum power control level on GSM900. USB_VBUS USB detection 3.0 Typ. Max. Unit 400 mV 1.8 2.0 A 5.0 5.25 V 6.3. Operating Temperature The operating temperature is listed in the following table.
LTE Module EC25-A User Manual Table 30: Conducted RF Output Power Frequency Max. Min. WCDMA B2/B5 22.5dBm±1dB <-50dBm LTE FDD B2/B4/B12 22dBm±2dB <-44dBm Directives and Standards The EC25-A module is designed to comply with the FCC statements. FCC ID: XMR201605EC25A, The Host system using EC25-A, should have label indicated "Contains FCC ID: XMR201605EC25A". FCC Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.
LTE Module EC25-A User Manual Table 31: Electrostatics Discharge Characteristics Tested Points Contact Discharge Air Discharge Unit VBAT, GND ±5 ±10 kV All Antenna Interfaces ±4 ±8 kV Other Interfaces ±0.
LTE Module EC25-A User Manual 7 Mechanical Dimensions This chapter describes the mechanical dimensions of the module. All dimensions are measured in mm. 7.1. Mechanical Dimensions of the Module 2.4+/-0.2 (29+/-0.15) (32+/-0.15) 0.
LTE Module EC25-A User Manual 29.0 32.
LTE Module EC25-A User Manual Keepout area 29.0 7.2. Footprint of Recommendation 32.0 Figure 34: Recommended Footprint (Top View) NOTES 1. 2. Pads 73~84 should not be designed. In order to maintain the module, keep about 3mm between the module and other components in the host PCB.
LTE Module EC25-A User Manual 7.3. Top View of the Module Figure 35: Top View of the Module 7.4.
LTE Module EC25-A User Manual 8 Storage and Manufacturing 8.1. Storage EC25 is stored in a vacuum-sealed bag. The restrictions of storage condition are shown as below. 1. Shelf life in sealed bag is 12 months at < 40ºC/90%RH. 2. After this bag is opened, devices that will be subjected to reflow soldering or other high temperature processes must be: Mounted within 72 hours at factory conditions of ≤ 30ºC/60%RH. Stored at <10% RH. 3.
LTE Module EC25-A User Manual suggested that the module should be mounted after the first panel has been reflowed. The following picture is the actual diagram which we have operated. ºC Preheat Heating Cooling 250 Liquids Temperature 217 200 ºC 200 40s~60s Temperature 160 ºC 150 70s~120s 100 Between 1~3 ºC/s 50 0 50 100 150 200 250 300 s Time Figure 37: Liquids Temperature 8.3. Packaging EC25 is packaged in tap and reel carriers. One reel is 11.
1 0. 29.3±0.15 0.35± 0.05 30.3±0.15 0± 5 1. 44.00±0.3 20.20±0.15 44.00±0.1 2.00±0.1 4.00±0.1 30.3±0.15 1.75±0.1 LTE Module EC25-A User Manual 4.2±0.15 3.1±0.15 32.5±0.15 33.5±0.15 32.5± 0.15 33.5± 0.15 48.5 Cover tape 13 100 Direction of feed 44.5+0.20 -0.
LTE Module EC25-A User Manual 9 Appendix A Reference Table 32: Related Documents SN Document Name Remark [1] Quectel_EC25_Power_Management_Application_ Note EC25 Power Management Application Note [2] Quectel_EC25_AT_Commands_Manual EC25 AT Commands Manual [3] Quectel_EC25_GNSS_AT_Commands_Manual EC25 GNSS AT Commands Manual [4] Quectel_Module_Secondary_SMT_User_Guide Module Secondary SMT User Guide Table 33: Terms and Abbreviations Abbreviation Description AMR Adaptive Multi-rate bps
LTE Module EC25-A User Manual EFR Enhanced Full Rate ESD Electrostatic Discharge FDD Frequency Division Duplex FR Full Rate GLONASS GLObalnaya NAvigatsionnaya Sputnikovaya Sistema, the Russian Global Navigation Satellite System GMSK Gaussian Minimum Shift Keying GNSS Global Navigation Satellite System GPS Global Positioning System GSM Global System for Mobile Communications HR Half Rate HSPA High Speed Packet Access HSDPA High Speed Downlink Packet Access HSUPA High Speed Uplink Pa
LTE Module EC25-A User Manual PPP Point-to-Point Protocol QAM Quadrature Amplitude Modulation QPSK Quadrature Phase Shift Keying RF Radio Frequency RHCP Right Hand Circularly Polarized Rx Receive SIM Subscriber Identification Module SMS Short Message Service TDD Time Division Duplexing TDMA Time Division Multiple Access TD-SCDMA Time Division-Synchronous Code Division Multiple Access TX Transmitting Direction UL Uplink UMTS Universal Mobile Telecommunications System URC Unsolic
LTE Module EC25-A User Manual VOHmax Maximum Output High Level Voltage Value VOHmin Minimum Output High Level Voltage Value VOLmax Maximum Output Low Level Voltage Value VOLmin Minimum Output Low Level Voltage Value VSWR Voltage Standing Wave Ratio WCDMA Wideband Code Division Multiple Access EC25-A_User_Manual Confidential / Released 67 / 70
LTE Module EC25-A User Manual 10 Appendix B GPRS Coding Scheme Table 34: Description of Different Coding Schemes Scheme CS-1 CS-2 CS-3 CS-4 Code Rate 1/2 2/3 3/4 1 USF 3 3 3 3 Pre-coded USF 3 6 6 12 Radio Block excl.USF and BCS 181 268 312 428 BCS 40 16 16 16 Tail 4 4 4 - Coded Bits 456 588 676 456 Punctured Bits 0 132 220 - Data Rate Kb/s 9.05 13.4 15.6 21.
LTE Module EC25-A User Manual 11 Appendix C GPRS Multi-slot Class Twenty-nine classes of GPRS multi-slot modes are defined for MS in GPRS specification. Multi-slot classes are product dependant, and determine the maximum achievable data rates in both the uplink and downlink directions. Written as 3+1 or 2+2, the first number indicates the amount of downlink timeslots, while the second number indicates the amount of uplink timeslots.
LTE Module Sires EC25 Hardware Design 12 Appendix D EDGE Modulation and Coding Scheme Table 36: EDGE Modulation and Coding Scheme Coding Scheme Modulation Coding Family 1 Timeslot 2 Timeslot 4 Timeslot CS-1: GMSK / 9.05kbps 18.1kbps 36.2kbps CS-2: GMSK / 13.4kbps 26.8kbps 53.6kbps CS-3: GMSK / 15.6kbps 31.2kbps 62.4kbps CS-4: GMSK / 21.4kbps 42.8kbps 85.6kbps MCS-1 GMSK C 8.80kbps 17.60kbps 35.20kbps MCS-2 GMSK B 11.2kbps 22.4kbps 44.8kbps MCS-3 GMSK A 14.
