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LTE Module Series

EG21-G Hardware Design

EG21-G_Hardware_Design 40 / 100

In order to enhance the reliability and availability of the (U)SIM card in customers’ applications, please
follow the criteria below in (U)SIM circuit design:



Keep placement of (U)SIM card connector to the module as close as possible. Keep the trace length

as less than 200mm as possible.



Keep (U)SIM card signals away from RF and VBAT traces.



Assure the ground between the module and the (U)SIM card connector short and wide. Keep the
trace width of ground and USIM_VDD no less than 0.5mm to maintain the same electric potential.
Make sure the bypass capacitor between USIM_VDD and USIM_GND less than 1uF, and place it as
close to (U)SIM card connector as possible. If the ground is complete on customers’ PCB,
USIM_GND can be connected to PCB ground directly.



To avoid cross-talk between USIM_DATA and USIM_CLK, keep them away from each other and
shield them with surrounded ground.



In order to offer good ESD protection, it is recommended to add a TVS diode array whose parasitic
capacitance should not be more than 15pF. The 0Ω resistors should be added in series between the
module and the (U)SIM card to facilitate debugging. The 33pF capacitors are used for filtering
interference of EGSM900MHz. Please note that the (U)SIM peripheral circuit should be close to the
(U)SIM card connector.



The pull-up resistor on USIM_DATA line can improve anti-jamming capability when long layout trace
and sensitive occasion are applied, and should be placed close to the (U)SIM card connector.

3.10.

USB Interface

EG21-G contains one integrated Universal Serial Bus (USB) interface which complies with the USB 2.0
specification and supports high-speed (480Mbps) and full-speed (12Mbps) modes. The USB interface is
used for AT command communication, data transmission, GNSS NMEA sentences output, software
debugging, firmware upgrade and voice over USB*. The following table shows the pin definition of USB
interface.

Table 10: Pin Description of USB Interface

Pin Name

Pin No.

I/O

Description

Comment

USB_DP

69

IO

USB differential data bus (+)

Require differential
impedance of 90Ω

USB_DM

70

IO

USB differential data bus (-)

Require differential
impedance of 90Ω

USB_VBUS

71

PI

USB connection detection

Typical 5.0V

GND

72

Ground

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Содержание EG21-G

Страница 1: ...EG21 G Hardware Design LTE Module Series Rev EG21 G_Hardware_Design_V1 0 Date 2019 03 12 Status Released www quectel com ...

Страница 2: ...N PROVIDED IS BASED UPON CUSTOMERS REQUIREMENTS QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE QUECTEL DOES NOT MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN AND DOES NOT ACCEPT ANY LIABILITY FOR ANY INJURY LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR RELIANCE UPON THE INFORMATION ALL INFORMATION SUPPLIED HEREIN IS SUBJECT TO CHANGE WITHOUT PR...

Страница 3: ...LTE Module Series EG21 G Hardware Design EG21 G_Hardware_Design 2 100 About the Document History Revision Date Author Description 1 0 2019 03 11 Lorry XU Harry HUANG Initial ...

Страница 4: ...eup Function 28 3 5 1 3 USB Application with USB Suspension Resume and RI Function 29 3 5 1 4 USB Application without USB Suspension Function 30 3 5 2 Airplane Mode 30 3 6 Power Supply 31 3 6 1 Power Supply Pins 31 3 6 2 Decrease Voltage Drop 32 3 6 3 Reference Design for Power Supply 33 3 6 4 Monitor the Power Supply 33 3 7 Power on and off Scenarios 34 3 7 1 Turn on Module Using the PWRKEY 34 3 ...

Страница 5: ...ector for Antenna Installation 62 6 Electrical Reliability and Radio Characteristics 65 6 1 Absolute Maximum Ratings 65 6 2 Power Supply Ratings 66 6 3 Operation and Storage Temperatures 66 6 4 Current Consumption 67 6 5 RF Output Power 72 6 6 RF Receiving Sensitivity 72 6 7 Electrostatic Discharge 74 6 8 Thermal Consideration 74 7 Mechanical Dimensions 77 7 1 Mechanical Dimensions of the Module 7...

Страница 6: ...TUS ACTIVITY INDICATOR 49 TABLE 21 WORKING STATE OF THE NETWORK CONNECTION STATUS ACTIVITY INDICATOR 49 TABLE 22 PIN DEFINITION OF STATUS 50 TABLE 23 BEHAVIORS OF RI 51 TABLE 24 PIN DEFINITION OF USB_BOOT INTERFACE 52 TABLE 25 GNSS PERFORMANCE 54 TABLE 26 PIN DEFINITION OF THE RF ANTENNA 56 TABLE 27 MODULE OPERATING FREQUENCIES 56 TABLE 28 PIN DEFINITION OF GNSS ANTENNA INTERFACE 60 TABLE 29 GNSS ...

Страница 7: ...LTE Module Series EG21 G Hardware Design EG21 G_Hardware_Design 6 100 TABLE 44 EDGE MODULATION AND CODING SCHEMES 92 ...

Страница 8: ...EFERENCE CIRCUIT OF U SIM INTERFACE WITH A 6 PIN U SIM CARD CONNECTOR 39 FIGURE 19 REFERENCE CIRCUIT OF USB APPLICATION 41 FIGURE 20 REFERENCE CIRCUIT WITH TRANSLATOR CHIP 43 FIGURE 21 REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT 44 FIGURE 22 PRIMARY MODE TIMING 45 FIGURE 23 AUXILIARY MODE TIMING 45 FIGURE 24 REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC 46 FIGURE 25 REFERENCE CIRCUIT OF SD C...

Страница 9: ...HEATSINK AT THE BACKSIDE OF CUSTOMERS PCB 75 FIGURE 43 MODULE TOP AND SIDE DIMENSIONS 77 FIGURE 44 MODULE BOTTOM DIMENSIONS BOTTOM VIEW 78 FIGURE 45 RECOMMENDED FOOTPRINT TOP VIEW 79 FIGURE 46 TOP VIEW OF THE MODULE 80 FIGURE 47 BOTTOM VIEW OF THE MODULE 80 FIGURE 48 REFLOW SOLDERING THERMAL PROFILE 82 FIGURE 49 TAPE AND REEL SPECIFICATIONS 84 FIGURE 51 TAPE AND REEL DIRECTIONS 84 ...

Страница 10: ...ations This document can help customers quickly understand module interface specifications electrical and mechanical details as well as other related information of EG21 G module To facilitate its application in different fields relevant reference design is also provided for customers reference Associated with application note and user guide customers can use the module to design and set up mobile...

Страница 11: ...consult the airline staff for more restrictions on the use of wireless devices on boarding the aircraft Wireless devices may cause interference on sensitive medical equipment so please be aware of the restrictions on the use of wireless devices when in hospitals clinics or other healthcare facilities Cellular terminals or mobiles operating over radio signals and cellular network cannot be guarante...

Страница 12: ...ncludes Data only and Telematics versions Data only version does not support voice function while Telematics version supports it With a compact profile of 29 0mm 32 0mm 2 4mm EG21 G can meet almost all requirements for M2M applications such as automotive metering tracking system security router wireless POS mobile computing device PDA phone tablet PC etc EG21 G is an SMD type module which can be e...

Страница 13: ...Bm 2dB for LTE FDD bands Class 3 23dBm 2dB for LTE TDD bands LTE Features Support up to non CA Cat 1 FDD and TDD Support 1 4MHz 20MHz RF bandwidth Support MIMO in DL direction LTE FDD Max 10Mbps DL Max 5Mbps UL LTE TDD Max 8 96Mbps DL Max 3 1Mbps UL UMTS Features Support 3GPP R8 DC HSDPA HSPA HSDPA HSUPA and WCDMA Support QPSK 16 QAM and 64 QAM modulation DC HSDPA Max 7 2Mbps DL HSUPA Max 5 76Mbps...

Страница 14: ...Support master and slave modes but must be the master in long frame synchronization USB Interface Compliant with USB 2 0 specification slave only the data transfer rate can reach up to 480Mbps Used for AT command communication data transmission GNSS NMEA output software debugging firmware upgrade and voice over USB Support USB serial drivers for Windows 7 8 8 1 10 Windows CE 5 0 6 0 7 0 Linux 2 6 ...

Страница 15: ...ation temperature range the module is 3GPP compliant 2 2 Within extended temperature range the module remains the ability to establish and maintain a voice SMS data transmission emergency call etc There is no unrecoverable malfunction There are also no effects on radio spectrum and no harm to radio network Only one or more parameters like Pout might reduce in their value and exceed the specified t...

Страница 16: ...s VDD_EXT USB U SIM PCM UARTs I2C RESET_N 19 2M XO STATUS GPIOs SAW Control IQ Control Duplex SAW Tx PRx DRx SD Figure 1 Functional Diagram means under development 2 4 Evaluation Board In order to help customers develop applications with EG21 G Quectel supplies an evaluation board EVB USB to RS 232 converter cable earphone antenna and other peripherals to control or test the module NOTE ...

Страница 17: ...G is equipped with 144 LGA 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 U SIM interface USB interface UART interfaces PCM and I2C interfaces SD card interface ADC interfaces Status indication USB_BOOT interface ...

Страница 18: ...100 101 102 106 107 111 112 103 104 109 105 110 89 94 98 88 93 97 86 91 96 85 90 95 99 87 92 108 113 RESERVED RESERVED 117 126 125 124 123 122 121 118 127 128 115 USB_BOOT 1 RESERVED 116 140 1371 136 1 135 134 133 132 131 130 129 114 VDD_SDIO Power Pins Signal Pins GND Pins RESERVED RESERVED 141 142 RESERVED RESERVED 143 144 119 120 RESERVED Pins Bluetooth Pins PCM_IN 3 PCM_OUT 3 PCM_SYNC 3 PCM_CL...

Страница 19: ...n Power Supply Pin Name Pin No I O Description DC Characteristics Comment VBAT_BB 59 60 PI Power supply for module s baseband part Vmax 4 3V Vmin 3 3V Vnorm 3 8V It must be able to provide sufficient current up to 0 8A VBAT_RF 57 58 PI Power supply for module s RF part Vmax 4 3V Vmin 3 3V Vnorm 3 8V It must be able to provide sufficient current up to 1 8A in a burst transmission VDD_EXT 7 PO Provi...

Страница 20: ...nused keep it open NET_MODE 5 DO Indicate the module network registration mode VOHmin 1 35V VOLmax 0 45V 1 8V power domain Cannot be pulled up before startup If unused keep it open NET_ STATUS 6 DO Indicate the module network activity status VOHmin 1 35V VOLmax 0 45V 1 8V power domain If unused keep it open USB Interface Pin Name Pin No I O Description DC Characteristics Comment USB_VBUS 71 PI USB...

Страница 21: ...ically USIM_DATA 15 IO Data signal of U SIM card For 1 8V U SIM VILmax 0 6V VIHmin 1 2V VOLmax 0 45V VOHmin 1 35V For 3 0V U SIM VILmax 1 0V VIHmin 1 95V VOLmax 0 45V VOHmin 2 55V USIM_CLK 16 DO Clock signal of U SIM card For 1 8V U SIM VOLmax 0 45V VOHmin 1 35V For 3 0V U SIM VOLmax 0 45V VOHmin 2 55V USIM_RST 17 DO Reset signal of U SIM card For 1 8V U SIM VOLmax 0 45V VOHmin 1 35V For 3 0V U SI...

Страница 22: ...ontrol 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 TXD 67 DO Transmit data VOLmax 0 45V VOHmin 1 35V 1 8V power domain If unused keep it open RXD 68 DI Receive data VILmin 0 3V VILmax 0 6V VIHmin 1 2V VIHmax 2 0V 1 8V power domain If unused keep it open Debug UART Interface Pin Name Pin No I O Description...

Страница 23: ... 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 PCM_CLK 27 IO PCM clock VOLmax 0 45V VOHmin 1 35V VILmin 0 3V VILmax 0 6V VIHmin 1 2V VIHmax 2 0V I2C Interface Pin Name Pin No I O Description DC Characteristics Comment I2C_SCL 41 OD I2C serial clock Used for external codec An external pull up...

Страница 24: ...x 0 58V VIHmin 1 27V VIHmax 2 0V 3 0V signaling VOLmax 0 38V VOHmin 2 01V VILmin 0 3V VILmax 0 76V VIHmin 1 72V VIHmax 3 34V SDIO signal level can be selected according to SD card supported level please refer to SD 3 0 protocol for more details If unused keep it open SDC2_ DATA1 30 IO SD card SDIO bus DATA1 1 8V signaling VOLmax 0 45V VOHmin 1 4V VILmin 0 3V VILmax 0 58V VIHmin 1 27V VIHmax 2 0V 3...

Страница 25: ...0 45V VOHmin 1 4V 3 0V signaling VOLmax 0 38V VOHmin 2 01V SDIO signal level can be selected according to SD card supported level please refer to SD 3 0 protocol for more details If unused keep it open SDC2_CMD 33 IO SD card SDIO bus command 1 8V signaling VOLmax 0 45V VOHmin 1 4V VILmin 0 3V VILmax 0 58V VIHmin 1 27V VIHmax 2 0V 3 0V signaling VOLmax 0 38V VOHmin 2 01V VILmin 0 3V VILmax 0 76V VI...

Страница 26: ...main If unused keep it open BT_CTS 40 DO BT UART clear to send VOLmax 0 45V VOHmin 1 35V 1 8V power domain Cannot be pulled up before startup If unused keep it open BT_EN 139 DO BT function control via FC20 module VOLmax 0 45V VOHmin 1 35V 1 8V power domain If unused keep it open RF Interface Pin Name Pin No I O Description DC Characteristics Comment ANT_DIV 35 AI Diversity antenna 50Ω impedance I...

Страница 27: ...e Pin Name Pin No I O Description DC Characteristics Comment USB_BOOT 115 DI Force the module to enter into emergency download mode VILmin 0 3V VILmax 0 6V VIHmin 1 2V VIHmax 2 0V 1 8V power domain Active high It is recommended to reserve test point RESERVED Pins Pin Name Pin No I O Description DC Characteristics Comment RESERVED 3 18 43 55 73 84 113 114 116 117 118 138 140 144 Reserved Keep these...

Страница 28: ... 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 rema...

Страница 29: ...configured to high level or low level detection Please refer to AT QCFG apready command for details means under development 3 5 1 2 USB Application with USB Remote Wakeup Function If the host supports USB suspension resume and remote wakeup function the following three preconditions must be met to let the module enter into the sleep mode Execute AT QSCLK 1 command to enable sleep mode Ensure the D...

Страница 30: ...B Suspension Resume and RI Function If the host supports USB suspension and resume but does not support remote wake up function the RI signal is needed to wake up the host There are three preconditions to let the module enter into the sleep mode Execute AT QSCLK 1 command to enable the sleep mode Ensure the DTR is held at high level or keep it open The host s USB bus which is connected with the mo...

Страница 31: ...r keep it open Disconnect USB_VBUS The following figure shows the connection between the module and the host USB_VBUS USB_DP USB_DM AP_READY VDD USB_DP USB_DM GPIO Module Host RI EINT Power Switch GPIO GND GND Figure 6 Sleep Mode Application without Suspension Function Switching on the power switch to supply power to USB_VBUS will wake up the module Please pay attention to the level match shown in...

Страница 32: ...y default It can be enabled by AT QCFG airplanecontrol command and this command is under development 2 The execution of AT CFUN command will not affect GNSS function 3 6 Power Supply 3 6 1 Power Supply Pins EG21 G provides four VBAT pins to connect with the external power supply and there are two separate voltage domains for VBAT Two VBAT_RF pins for module s RF part Two VBAT_BB pins for module s ...

Страница 33: ...R It is recommended to use three ceramic capacitors 100nF 33pF 10pF for composing the MLCC array and place these capacitors close to VBAT_BB VBAT_RF pins The main power supply from an external application has to be a single voltage source and can be expanded to two sub paths with star structure The width of VBAT_BB trace should be no less than 1mm and the width of VBAT_RF trace should be no less t...

Страница 34: ... the desired output VBAT a buck converter is preferred to be used as the power supply The following figure shows a reference design for 5V input power source The typical output of the power supply is about 3 8V and the maximum load current is 3A DC_IN MIC29302WU IN OUT EN GND ADJ 2 4 1 3 5 VBAT 100nF 470uF 100nF 100K 47K 470uF 470R 51K 1 1 4 7K 47K VBAT_EN Figure 9 Reference Circuit of Power Suppl...

Страница 35: ...EY pin to a low level for at least 500ms It is recommended to use an open drain collector driver to control the PWRKEY After STATUS pin require external pull up outputs a low level PWRKEY pin can be released A simple reference circuit is illustrated in the following figure Turn on pulse PWRKEY 4 7K 47K 500ms 10nF Figure 10 Turn on the Module by Using Driving Circuit The other way to control the PW...

Страница 36: ...T About 100ms BOOT_CONFIG USB_BOOT 100ms Ater this time the BOOT_CONFIG pin can be set high level by external circuit Figure 12 Power on Scenario of Module Please make sure that VBAT is stable before pulling down PWRKEY pin The time between them should be no less than 30ms 3 7 2 Turn off Module The following procedures can be used to turn off the module Normal power down procedure Turn off the mod...

Страница 37: ...and to turn off the module which is similar to turning off the module via PWRKEY pin Please refer to document 2 for details about AT QPOWD command 1 In order to avoid damaging internal flash please do not switch off the power supply when the module works normally Only after the module is shut down by PWRKEY or AT command then the power supply can be cut off 2 When turning off module with AT comman...

Страница 38: ...ain The recommended circuit is similar to the PWRKEY control circuit An open drain collector driver or button can be used to control the RESET_N Reset pulse RESET_N 4 7K 47K 150ms 460ms Figure 14 Reference Circuit of RESET_N by Using Driving Circuit RESET_N S2 Close to S2 TVS Figure 15 Reference Circuit of RESET_N by Using Button The reset scenario is illustrated in the following figure ...

Страница 39: ... IMT 2000 requirements Both 1 8V and 3 0V U SIM cards are supported Table 9 Pin Definition of U SIM Interface Pin Name Pin No I O Description Comment USIM_VDD 14 PO Power supply for U SIM card Either 1 8V or 3 0V is supported by the module automatically USIM_DATA 15 IO Data signal of U SIM card USIM_CLK 16 DO Clock signal of U SIM card USIM_RST 17 DO Reset signal of U SIM card USIM_ PRESENCE 13 DI...

Страница 40: ...ND GND 33pF 33pF 33pF VCC RST CLK IO VPP GND GND USIM_VDD 15K U SIM Card Connector Figure 17 Reference Circuit of U SIM Interface with an 8 Pin U SIM Card Connector If U SIM card detection function is not needed please keep USIM_PRESENCE unconnected A reference circuit for U SIM interface with a 6 pin U SIM card connector is illustrated in the following figure Module USIM_VDD USIM_GND USIM_RST USI...

Страница 41: ...hose parasitic capacitance should not be more than 15pF The 0Ω resistors should be added in series between the module and the U SIM card to facilitate debugging The 33pF capacitors are used for filtering interference of EGSM900MHz Please note that the U SIM peripheral circuit should be close to the U SIM card connector The pull up resistor on USIM_DATA line can improve anti jamming capability when...

Страница 42: ...are not mounted by default In order to ensure the integrity of USB data line signal L1 R3 R4 components must be placed close to the module and also these resistors should be placed close to each other The extra stubs of trace must be as short as possible The following principles should be complied with when design the USB interface so as to meet USB 2 0 specification It is important to route the U...

Страница 43: ...r data transmission and AT command communication The debug UART interface supports 115200bps baud rate It is used for Linux console and log output The following tables show the pin definition of the UART interfaces Table 11 Pin Definition of Main UART Interface Pin Name Pin No I O Description Comment RI 62 DO Ring indicator 1 8V power domain DCD 63 DO Data carrier detection CTS 64 DO Clear to send...

Страница 44: ...ts is recommended The following figure shows a reference design VCCA VCCB OE A1 A2 A3 A4 A5 A6 A7 A8 GND B1 B2 B3 B4 B5 B6 B7 B8 VDD_EXT RI DCD RTS RXD DTR CTS TXD 51K 51K 0 1uF 0 1uF RI_MCU DCD_MCU RTS_MCU RXD_MCU DTR_MCU CTS_MCU TXD_MCU VDD_MCU Translator 10K 120K Figure 20 Reference Circuit with Translator Chip Please visit http www ti com for more information Another example with transistor tr...

Страница 45: ...on works as master only In primary mode the data is sampled on the falling edge of the PCM_CLK and transmitted on the rising edge The PCM_SYNC falling edge represents the MSB In this mode the PCM interface supports 256kHz 512kHz 1024kHz or 2048kHz PCM_CLK at 8kHz PCM_SYNC and also supports 4096kHz PCM_CLK at 16kHz PCM_SYNC In auxiliary mode the data is sampled on the falling edge of the PCM_CLK an...

Страница 46: ...PCM_SYNC PCM_OUT MSB LSB PCM_IN 125us MSB 1 2 32 31 LSB Figure 23 Auxiliary Mode Timing The following table shows the pin definition of PCM and I2C interfaces which can be applied on audio codec design Table 14 Pin Definition of PCM and I2C Interfaces Pin Name Pin No I O Description Comment PCM_IN 24 DI PCM data input 1 8V power domain PCM_OUT 25 DO PCM data output 1 8V power domain ...

Страница 47: ...K and 8KHz PCM_SYNC Please refer to document 2 for more details about AT QDAI command The following figure shows a reference design of PCM interface with external codec IC PCM_IN PCM_OUT PCM_SYNC PCM_CLK I2C_SCL I2C_SDA Module 1 8V 4 7K 4 7K BCLK LRCK DAC ADC SCL SDA BIAS MICBIAS INP INN LOUTP LOUTN Codec Figure 24 Reference Circuit of PCM Application with Audio Codec 1 It is recommended to reserv...

Страница 48: ... card power If unused keep it open SD_INS_DET 23 DI SD card insertion detection 1 8V power domain If unused keep it open The following figure shows a reference design of SD card SD Card Connector DAT2 CD DAT3 CMD VDD CLK VSS DAT0 DAT1 DETECTIVE Module SDC2_DATA3 SDC2_DATA2 SDC2_DATA1 VDD_SDIO SDC2_DATA0 SDC2_CLK SDC2_CMD SD_INS_DET R1 0R R7 NM R8 NM R9 NM R10 NM R11 NM R12 470K VDD_EXT VDD_3V R2 0...

Страница 49: ... as well as noisy signals such as clock signals DCDC signals etc It is important to route the SDIO signal traces with total grounding The impedance of SDIO data trace is 50Ω 10 Make sure the adjacent trace spacing is two times of the trace width and the load capacitance of SDIO bus should be less than 15pF It is recommended to keep the trace length difference between CLK and DATA CMD less than 1mm...

Страница 50: ... The module provides two pins which are NET_MODE and NET_STATUS The following tables describe pin definition and logic level changes in different network status Table 18 Pin Definition of Network Connection Status Activity Indicator Pin Name Pin No I O Description Comment NET_MODE 5 DO Indicate the module network registration mode 1 8V power domain Cannot be pulled up before startup NET_STATUS 6 D...

Страница 51: ...for indicating the module s operation status It can be connected to a GPIO of DTE with a pull up resistor or as LED indication circuit as below When the module is turned on normally the STATUS will present the low state Otherwise the STATUS will present high impedance state Table 20 Pin Definition of STATUS Pin Name Pin No I O Description Comment STATUS 61 OD Indicate the module operation status A...

Страница 52: ...igger the behavior of RI pin URC can be outputted from UART port USB AT port and USB modem port through configuration via AT QURCCFG command The default port is USB AT port In addition RI behavior can be configured flexibly The default behavior of the RI is shown as below Table 21 Behaviors of RI State Response Idle RI keeps at high level URC RI outputs 120ms low pulse when a new URC returns The R...

Страница 53: ...Name Pin No I O Description Comment USB_BOOT 115 DI Force the module to enter into emergency download mode 1 8V power domain Active high It is recommended to reserve test point The following figure shows a reference circuit of USB_BOOT interface Module USB_BOOT VDD_EXT 4 7K Test point TVS Close to test point Figure 28 Reference Circuit of USB_BOOT Interface V IL 0 5V VH 0 8V VBAT PWRKEY 500ms RESE...

Страница 54: ...stable before pulling down PWRKEY pin The time between them is no less than 30ms 2 When using MCU to control module to enter into the forced download mode follow the above timing sequence It is not recommended to pull up USB_BOOT to 1 8V before powering up the VBAT Short the test points as shown in Figure 32 can manually force the module to enter into download mode NOTES ...

Страница 55: ...y default By default EG21 G GNSS engine is switched off It has to be switched on via AT command For more details about GNSS engine technology and configurations please refer to document 3 4 2 GNSS Performance The following table shows GNSS performance of EG21 G Table 23 GNSS Performance Parameter Description Conditions Typ Unit Sensitivity GNSS Cold start Autonomous 146 dBm Reacquisition Autonomou...

Страница 56: ...the antenna port on which the module fixes position within 3 minutes after executing cold start command 4 3 Layout Guidelines The following layout guidelines should be taken into account in customers designs Maximize the distance among GNSS antenna main antenna and Rx diversity antenna Digital circuits such as U SIM card USB interface camera module and display connector should be kept away from th...

Страница 57: ...nna Interfaces 5 1 1 Pin Definition The pin definition of main antenna and Rx diversity antenna interfaces is shown below Table 24 Pin Definition of the RF Antenna Pin Name Pin No I O Description Comment ANT_MAIN 49 IO Main antenna pad 50Ω impedance ANT_DIV 35 AI Receive diversity antenna pad 50Ω impedance If unused keep it open 5 1 2 Operating Frequency Table 25 Module Operating Frequencies 3GPP ...

Страница 58: ...805 1880 MHz LTE FDD B4 1710 1755 2110 2155 MHz LTE FDD B5 824 849 869 894 MHz LTE FDD B7 2500 2570 2620 2690 MHz LTE FDD B8 880 915 925 960 MHz LTE FDD B12 699 716 729 746 MHz LTE FDD B13 777 787 746 756 MHz LTE FDD B18 815 830 860 875 MHz LTE FDD B19 830 845 875 890 MHz LTE FDD B20 832 862 791 821 MHz LTE FDD B25 1850 1915 1930 1995 MHz LTE FDD B26 814 849 859 894 MHz LTE FDD B28 703 748 758 803...

Страница 59: ...n is enabled by default AT QCFG diversity 0 command can be used to disable receive diversity Please refer to document 2 for details 3 Place the π type matching components R1 C1 C2 R2 C3 C4 as close to the antenna as possible 5 1 4 Reference Design of RF Layout For user s PCB the characteristic impedance of all RF traces should be controlled as 50Ω The impedance of the RF traces is usually determin...

Страница 60: ... Hardware Design EG21 G_Hardware_Design 59 100 Figure 31 Microstrip Design on a 2 layer PCB Figure 32 Coplanar Waveguide Design on a 2 layer PCB Figure 33 Coplanar Waveguide Design on a 4 layer PCB Layer 3 as Reference Ground ...

Страница 61: ...e right angle traces should be changed to curved ones There should be clearance area under the signal pin of the antenna connector or solder joint The reference ground of RF traces should be complete Meanwhile adding some ground vias around RF traces and the reference ground could help to improve RF performance The distance between the ground vias and RF traces should be no less than two times the...

Страница 62: ... as below GNSS Antenna VDD Module ANT_GNSS 47nH 10R 0 1uF 100pF NM NM Figure 35 Reference Circuit of GNSS Antenna 1 An external LDO can be selected to supply power according to the active antenna requirement 2 If the module is designed with a passive antenna then the VDD circuit is not needed 5 3 Antenna Installation 5 3 1 Antenna Requirement The following table shows the requirements on main ante...

Страница 63: ...put impedance Ω 50 Polarization type Vertical Cable insertion loss 1dB GSM850 EGSM900 WCDMA B5 B6 B8 B19 LTE B5 B8 B12 B13 B18 B19 B20 B26 B28 Cable insertion loss 1 5dB DCS1800 PCS1900 WCDMA B1 B2 B4 LTE B1 B2 B3 B4 B25 B39 Cable insertion loss 2dB LTE B7 B38 B40 B41 1 It is recommended to use a passive GNSS antenna when LTE B13 or B14 is supported as the use of active antenna may generate harmon...

Страница 64: ...re Design EG21 G_Hardware_Design 63 100 Figure 36 Dimensions of the U FL R SMT Connector Unit mm U FL LP serial connectors listed in the following figure can be used to match the U FL R SMT Figure 37 Mechanicals of U FL LP Connectors ...

Страница 65: ...s EG21 G Hardware Design EG21 G_Hardware_Design 64 100 The following figure describes the space factor of mated connector Figure 38 Space Factor of Mated Connector Unit mm For more details please visit http hirose com ...

Страница 66: ... ratings for power supply and voltage on digital and analog pins of the module are listed in the following table Table 29 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 3 V Voltage at ADC0 0 VBAT_BB V Voltage at ADC1 0 VBAT_BB V ...

Страница 67: ...rage temperatures are listed in the following table Table 31 Operation and Storage Temperatures Parameter Min Typ Max Unit Operation Temperature Range 1 35 25 75 ºC Extended Operation Range 2 40 85 ºC Storage Temperature Range 40 90 ºC 1 1 Within operation temperature range the module is 3GPP compliant 2 2 Within extended temperature range the module remains the ability to establish and maintain a...

Страница 68: ...D mA DCS DRX 2 USB disconnected TBD mA DCS DRX 5 USB disconnected TBD mA DCS DRX 5 USB suspended TBD mA DCS DRX 9 USB disconnected TBD mA WCDMA PF 64 USB disconnected TBD mA WCDMA PF 64 USB suspended TBD mA WCDMA PF 128 USB disconnected TBD mA WCDMA PF 256 USB disconnected TBD mA WCDMA PF 512 USB disconnected TBD mA LTE FDD PF 32 USB disconnected TBD mA LTE FDD PF 64 USB disconnected TBD mA LTE FD...

Страница 69: ...USB connected TBD mA LTE TDD PF 64 USB disconnected TBD mA LTE TDD PF 64 USB connected TBD mA GPRS data transfer GNSS OFF GSM900 4DL 1UL 32 5dBm TBD mA GSM900 3DL 2UL 32dBm TBD mA GSM900 2DL 3UL 30dBm TBD mA GSM900 1DL 4UL 29dBm TBD mA GSM850 4DL 1UL 32 5dBm TBD mA GSM850 3DL 2UL 32dBm TBD mA GSM850 2DL 3UL 30dBm TBD mA GSM850 1DL 4UL 29dBm TBD mA DCS1800 4DL 1UL 29 5dBm TBD mA DCS1800 3DL 2UL 29d...

Страница 70: ...A DCS1800 3DL 2UL 25dBm TBD mA DCS1800 2DL 3UL 23dBm TBD mA DCS1800 1DL 4UL 22dBm TBD mA PCS1900 4DL 1UL 26dBm TBD mA PCS1900 3DL 2UL 25dBm TBD mA PCS1900 2DL 3UL 23dBm TBD mA PCS1900 1DL 4UL 22dBm TBD mA WCDMA data transfer GNSS OFF WCDMA B1 HSDPA 21dBm TBD mA WCDMA B1 HSUPA 20 5dBm TBD mA WCDMA B2 HSDPA 21dBm TBD mA WCDMA B2 HSUPA 20 5dBm TBD mA WCDMA B4 HSDPA 21dBm TBD mA WCDMA B4 HSUPA 20 5dBm...

Страница 71: ...FDD B7 22 3dBm TBD mA LTE FDD B8 22 3dBm TBD mA LTE FDD B12 22 3dBm TBD mA LTE FDD B13 22 3dBm TBD mA LTE FDD B18 22 3dBm TBD mA LTE FDD B19 22 3dBm TBD mA LTE FDD B20 22 3dBm TBD mA LTE FDD B25 22 3dBm TBD mA LTE FDD B26 22 3dBm TBD mA LTE FDD B28 22 3dBm TBD mA LTE TDD B38 22 3dBm TBD mA LTE TDD B39 22 3dBm TBD mA LTE TDD B40 22 3dBm TBD mA LTE TDD B41 22 3dBm TBD mA GSM voice call GSM900PCL 5 3...

Страница 72: ...ice call WCDMA B1 22 5dBm TBD mA WCDMA B2 22 5dBm TBD mA WCDMA B4 22 5dBm TBD mA WCDMA B5 22 5dBm TBD mA WCDMA B6 22 5dBm TBD mA WCDMA B8 22 5dBm TBD mA WCDMA B19 22 5dBm TBD mA Table 33 GNSS Current Consumption of EG21 G Module Parameter Description Conditions Typ Unit IVBAT GNSS Searching AT CFUN 0 Cold start Passive Antenna TBD mA Lost state Passive Antenna TBD mA Tracking AT CFUN 0 Instrument ...

Страница 73: ...49dBm LTE FDD B1 B2 B3 B4 B5 B7 B8 B12 B13 B18 B19 B20 B25 B26 B28 23dBm 2dB 39dBm LTE TDD B38 B39 B40 B41 23dBm 2dB 39dBm In GPRS 4 slots TX mode the maximum output power is reduced by 3dB The design conforms to the GSM specification as described in Chapter 13 16 of 3GPP TS 51 010 1 6 6 RF Receiving Sensitivity The following tables show conducted RF receiving sensitivity of EG21 G module Table 35...

Страница 74: ... FDD B3 10M 97 5dBm 98 1dBm 99 7dBm 93 3dBm LTE FDD B4 10M 97 8dBm 98 2dBm 99 7dBm 96 3dBm LTE FDD B5 10M 98dBm 98 5dBm 99 9dBm 94 3dBm LTE FDD B7 10M 97 3dBm 97 6dBm 99 2dBm 94 3dBm LTE FDD B8 10M 98dBm 98dBm 99 8dBm 93 3dBm LTE FDD B12 10M 98dBm 98 3dBm 99 8dBm 93 3dBm LTE FDD B13 10M 98dBm 98dBm 99 5dBm 93 3dBm LTE FDD B18 10M 98dBm 99 4dBm 100dBm 96 3dBm LTE FDD B19 10M 98dBm 98 8dBm 99 9dBm 9...

Страница 75: ...Thermal Consideration In order to achieve better performance of the module it is recommended to comply with the following principles for thermal consideration On customers PCB design please keep placement of the module away from heating sources especially high power components such as ARM processor audio power amplifier power supply etc Do not place components on the opposite side of the PCB area ...

Страница 76: ...shows two kinds of heatsink designs for reference and customers can choose one or both of them according to their application structure Heatsink EG21 G Module Application Board Application Board Heatsink Thermal Pad Shielding Cover Figure 39 Referenced Heatsink Design Heatsink at the Top of the Module Thermal Pad Heatsink Application Board Application Board Heatsink Thermal Pad EG21 G Module Shiel...

Страница 77: ...hen the maximum BB chip temperature reaches or exceeds 115 C the module will disconnect from the network and it will recover to network connected state after the maximum temperature falls below 115 C Therefore the thermal design should be maximally optimized to make sure the maximum BB chip temperature always maintains below 105 C Customers can execute AT QTEMP command and get the maximum BB chip ...

Страница 78: ...l Dimensions This chapter describes the mechanical dimensions of the module All dimensions are measured in mm The tolerances for dimensions without tolerance values are 0 05mm 7 1 Mechanical Dimensions of the Module 32 0 15 29 0 15 0 8 2 4 0 2 Figure 41 Module Top and Side Dimensions ...

Страница 79: ...e_Design 78 100 2 0 2 0 3 5 1 50 3 2 3 4 3 2 3 4 3 2 6 75 3 5 32 0 15 2 8 4 8 0 82 5 96 1 6 2 15 4 4 1 7 4 88 1 8 1 8 1 15 1 05 1 10 1 10 29 0 15 1 30 2 40 2 49 3 45 1 30 3 0 3 85 1 30 0 80 1 25 1 90 3 35 1 30 Figure 42 Module Bottom Dimensions Bottom View ...

Страница 80: ...ded Footprint Top View 1 The keepout area should not be designed 2 For easy maintenance of the module please keep about 3mm between the module and other components in the host PCB 3 EG21 G share the same recommended footprint with EC25 but different recommended stencil Refer to document 4 for more information NOTES ...

Страница 81: ...Design 80 100 7 3 Design Effect Drawings of the Module Figure 44 Top View of the Module Figure 45 Bottom View of the Module These are design effect drawings of EG21 G module For more accurate pictures please refer to the module that you get from Quectel NOTE ...

Страница 82: ... the factory environment of 30ºC 60 RH Stored at 10 RH 3 Devices require bake before mounting if any circumstances below occurs When the ambient temperature is 23ºC 5ºC and the humidity indicator card shows the humidity is 10 before opening the vacuum sealed bag Device mounting cannot be finished within 168 hours at factory conditions of 30ºC 60 RH 4 If baking is required devices may be baked for ...

Страница 83: ...t the peak reflow temperature is 240ºC 245ºC and the absolute maximum reflow temperature is 245ºC To avoid damage to the module caused by repeated heating it is strongly recommended that the module should be mounted after reflow soldering for the other side of PCB has been completed The recommended reflow soldering thermal profile lead free reflow soldering and related parameters are shown below T...

Страница 84: ...t Spray test the laser engraved label information on the shielding can is still clearly identifiable and the 2D barcode is still readable although white rust may be found 8 3 Packaging EG21 G is packaged in tap and reel carriers Each reel is 11 88m long and contains 250pcs modules The figure below shows the package details measured in mm 30 3 0 15 29 3 0 15 30 3 0 15 32 5 0 15 33 5 0 15 0 35 0 05 ...

Страница 85: ...rdware Design EG21 G_Hardware_Design 84 100 Direction of feed Cover tape 13 100 44 5 0 20 0 00 48 5 Figure 47 Tape and Reel Specifications Carrier tape packing module Carrier tape unfolding 1083 Figure 48 Tape and Reel Directions ...

Страница 86: ...ual GNSS AT Commands Manual for EC25 EC21 EC20 R2 0 EC20 R2 1 EG95 EG91 EG25 G and EM05 modules 4 Quectel_Module_Secondary_SMT_User_Guide Module Secondary SMT User Guide 5 Quectel_EG25 G_Reference_Design EG25 G Reference Design 6 Quectel_RF_Layout_Application_Note RF Layout Application Note 7 Quectel_LTE_Module_Thermal_Design_Guide Thermal design guide for LTE modules including EC25 EC21 EC20 R2 0...

Страница 87: ...D 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 ...

Страница 88: ...drature Amplitude Modulation QPSK Quadrature Phase Shift Keying RF Radio Frequency RHCP Right Hand Circularly Polarized Rx Receive SGMII Serial Gigabit Media Independent Interface SIM Subscriber Identification Module SIMO Single Input Multiple Output SMS Short Message Service TDD Time Division Duplexing TDMA Time Division Multiple Access TD SCDMA Time Division Synchronous Code Division Multiple Ac...

Страница 89: ...e Value VILmax Maximum Input Low Level Voltage Value VILmin Minimum Input Low Level Voltage Value VImax Absolute Maximum Input Voltage Value VImin Absolute Minimum Input Voltage Value 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 Rat...

Страница 90: ...chemes Table 40 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 4 ...

Страница 91: ...r 2 2 the first number indicates the amount of downlink timeslots while the second number indicates the amount of uplink timeslots The active slots determine the total number of slots the GPRS device can use simultaneously for both uplink and downlink communications The description of different multi slot classes is shown in the following table Table 41 GPRS Multi slot Classes Multislot Class Down...

Страница 92: ...e Design EG21 G_Hardware_Design 91 100 14 4 4 NA 15 5 5 NA 16 6 6 NA 17 7 7 NA 18 8 8 NA 19 6 2 NA 20 6 3 NA 21 6 4 NA 22 6 4 NA 23 6 6 NA 24 8 2 NA 25 8 3 NA 26 8 4 NA 27 8 4 NA 28 8 6 NA 29 8 8 NA 30 5 1 6 31 5 2 6 32 5 3 6 33 5 4 6 ...

Страница 93: ...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 8kbps 29 6kbps 59 2kbps MCS 4 GMSK C 17 6kbps 35 2kbps 70 4kbps MCS 5 8 PSK B 22 4kbps 44 8kbps 89 6kbps MCS 6 8 PSK A 29 6kbps 59 2kbps 118 4kbps MCS 7 8 PSK B 44 8kbps 89 6kbps 179 2kbps MCS 8 8...

Страница 94: ...usly with any other antenna or transmitter 3 A label with the following statements must be attached to the host end product This device contains FCC ID XMR201906EG21G 4 To comply with FCC regulations limiting both maximum RF output power and human exposure to RF radiation maximum antenna gain including cable loss must not exceed Operating Band FCC Max Antenna Gain dBi IC Max Antenna Gain dBi GSM85...

Страница 95: ...e FCC Part 15B criteria for unintentional radiators in order to be properly authorized for operation as a Part 15 digital device The user s manual or instruction manual for an intentional or unintentional radiator shall caution the user that changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment In cases wher...

Страница 96: ...re émetteur The host product shall be properly labeled to identify the modules within the host product The Innovation Science and Economic Development Canada certification label of a module shall be clearly visible at all times when installed in the host product otherwise the host product must be labeled to display the Innovation Science and Economic Development Canada certification number for the...

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