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Quectel EG9 Series, Reference Design

The Quectel EG9 Series is a cutting-edge Reference Design that offers exceptional performance in a compact form. Enhance your product development with our comprehensive user manual, available for free download from manualshive.com, ensuring convenient access to all the necessary information and support for your project.

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LTE  Module  Series 

EG9x  Reference  Design

 

 

EG9x_Reference_Design                                                                                                                                4 / 4 
 
 
 

1

 

Reference Design 

 

1.1. Introduction 

 

This document provides the reference design for Quectel EG9x modules, which contain EG91 and EG95 

modules. 

 

1.2. Schematics 

 

The schematics illustrated in the following pages are provided for your reference only. 

 

Summary of Contents for EG9 Series

Page 1: ...EG9x Reference Design LTE Module Series Rev EG9x_Reference_Design_Rev A Date 2018 02 09 Status Released www quectel com ...

Page 2: ...ROVIDED 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 PRIOR...

Page 3: ...LTE Module Series EG9x Reference Design EC20_R2 1_Reference_Design 2 4 About the Document History Revision Date Author Description A 2018 02 09 Felix YIN Initial ...

Page 4: ...LTE Module Series EG9x Reference Design EC20_R2 1_Reference_Design 3 4 Contents About the Document 2 Contents 3 1 Reference Design 4 1 1 Introduction 4 1 2 Schematics 4 ...

Page 5: ...e_Design 4 4 1 Reference Design 1 1 Introduction This document provides the reference design for Quectel EG9x modules which contain EG91 and EG95 modules 1 2 Schematics The schematics illustrated in the following pages are provided for your reference only ...

Page 6: ... RI 40 I2C_SCL 41 I2C_SDA 42 USIM1_PRESENCE 43 USIM1_VDD 44 USIM1_RST 45 USIM1_DATA 46 USIM1_CLK 47 USIM_GND 48 GND 49 ANT_DIV 50 GND 51 RESERVED 52 VBAT_RF 53 VBAT_RF 54 GND 55 GND 56 RESERVED 57 RESERVED 58 GND 59 GND 60 ANT_MAIN 61 GND 62 GND U0101 A 63 RESERVED 64 RESERVED 65 RESERVED 66 RESERVED 67 GND 68 GND 69 GND 70 GND 71 GND 72 GND 73 GND 74 GND 75 USB_BOOT 76 RESERVED 77 RESERVED 78 RES...

Page 7: ...DY High Level Detection AP_READY Low Level Detection 4 Transistor circuits Q0203 Q0206 are used for level translation The Necessary Control Circuit Reference Design 5V power source from main board and AT Command manuals 1 VDD 2 GND 3 TXD 4 RXD 5 DTR 6 RI 7 CTS 8 RTS 9 DCD 12 USB_DM 13 USB_ID 14 GPIO_01 15 GPIO_02 16 GPIO_03 17 GPIO_04 10 USB_VBUS 11 USB_DP 18 GPIO_05 19 GPIO_06 20 GPIO_07 U0201 Q0...

Page 8: ... current up to 2A or more VDD_1V8 R0311 R0312 R0312 1 207 1 8V VDD_3 3V R0305 R0306 1 1 207 3 3V Supply Power for PCM Codec e g 5V e g 5V Notes Power on Sequence power on VDD_1V8 first then VDD_3 3V Power off Sequence power off VDD_3 3V first then VDD_1V8 1 CODEC_POWER_EN must be at low level in order to ensure the normal output voltage of VDD_3 3V If VDD_3 3V power supply needs to be switched off...

Page 9: ... the transistor circuit of RI and DCD is similar to that of CTS interface C0401 100nF R0402 120K R0401 10K C0402 100nF Q0401 2SC4617TLQ Q0402 2SC4617TLQ R0404 4 7K R0403 4 7K C0403 1nF R0405 4 7K R0406 4 7K C0404 1nF Q0403 2SC4617TLQ R0408 4 7K R0407 4 7K Q0404 2SC4617TLQ R0409 4 7K R0410 4 7K 6 A5 7 A6 8 A7 9 A8 10 OE 5 A4 4 A3 19 VCCB 20 B1 18 B2 14 B6 13 B7 12 B8 11 GND 3 A2 2 VCCA 1 A1 17 B3 1...

Page 10: ... CPVREF 19 CPVEE 20 HPO_L 21 ADCDAT1 22 DACDAT1 23 LRCK1 26 SCL 27 SDA 28 GPIO1 IRQ1 29 DBVDD 30 DCVDD 31 MICVDD 32 MICBIAS1 8 VREF2 24 BCLK1 1 JD1 9 LOUTL P 17 HPO_R 25 MCLK 33 DGND U0501 ALC5616 C0505 4 7uF C0504 4 7uF C0503 100nF R0501 0R C0501 4 7uF C0502 100nF C0509 2 2uF C0510 100nF C0506 4 7uF C0507 100nF C0508 2 2uF C0515 2 2uF C0516 2 2uF C0511 4 7uF R0503 0R R0508 NM_10K R0510 4 7K R0509...

Page 11: ...6 DVSS 7 IOVDD 8 SCL 9 SDA 10 MIC1LP LINE1LP 11 MIC1LM LINE1LM 12 MIC1RP LINE1RP 13 MIC1RM LINE1RM 14 MIC2L LINE2L MICDET 15 MICBIAS 16 MIC2R LINE2R 17 AVSS1 18 DRVDD 19 HPLOUT 20 HPLCOM 21 DRVSS 22 HPRCOM 23 HPROUT 24 DRVDD 25 AVDD 26 AVSS2 27 LEFT_LOP 28 LEFT_LOM 29 RIGHT_LOP 30 RIGHT_LOM 31 RESET 32 DVDD 33 GND U0601 TLV320AIC3104 C0615 100nF C0614 100nF R0615 1 5K R0616 1 5K C0613 2 2uF C0604 ...

Page 12: ...ces as differential pairs respectively 3 In earphone application route the MIC signal traces as differential pairs 4 All MIC and SPK signal traces should be routed with total grounding and far away from noise such as clock and DC DC signals etc 4 1 3 2 J0701 D0701 ESD9X5 0ST5G D0702 C0702 33pF C0704 33pF C0705 10pF C0703 10pF C0706 33pF C0701 10pF C0709 10pF C0710 33pF C0711 10pF C0712 33pF C0708 ...

Page 13: ... improve anti jamming capability of the U SIM circuit and they should be placed close to the U SIM card connector 2 It is recommended to connect the U SIM card connector GND to the module USIM_GND If the ground is complete on customers PCB USIM_GND can be connected to PCB ground directly 3 U0801 and U0802 is recommended to be used to offer good ESD protection and the parasitic capacitance should n...

Page 14: ...Antenna Interface C0901 and C0902 are reserved for impedance matching Reference Design C0903 and C0904 are reserved for impedance matching GNSS Antenna Interface C0905 and C0906 are reserved for impedance matching RF and GNSS Designs C0901 NM R0901 0R C0903 NM R0902 0R J0901 Main antenna J0902 Diversity antenna C0902 NM C0904 NM C0905 NM R0903 0R J0903 Gnss antenna C0906 NM 1 ANT_MAIN 1 ANT_DIV 1 ...

Page 15: ...tection components on USB data lines might influence the signal Typically the capacitance should be less than 1pF SPI_MOSI SPI_MISO SPI_CLK Note It is a dedicated one to one connection and no chip select SPI Connection Note When USB_BOOT is at high level the module will be forced to enter into download mode Emergency Download Mode Q1002 DTC043ZEBTL R1002 2 2K D1002 4 5 6 3 2 1 7 8 J1001 D1005 SD12...

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