Quectel EC25 series Reference Design Download Page 4 | Manualshive

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LTE Module Series

EC25 Reference Design

EC25_Reference_Design Confidential / Released 3 / 4

Contents

About the Document ................................................................................................................................ 2

Contents .................................................................................................................................................... 3

Reference Design .............................................................................................................................. 4

Introduction ............................................................................................................................. 4

Schematics ............................................................................................................................. 4

Quectel

Confidential

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Summary of Contents for EC25 series

Page 1: ...EC25 Reference Design LTE Module Series Rev EC25_Reference_Design_Rev D Date 2016 11 11 www quectel com...

Page 2: ...TION 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 CONTA...

Page 3: ...design in Sheet 1 2 Added power supply for codec in Sheet 3 3 Added note for UART Translator Transistor Solution in Sheet 4 4 Changed some DGND to AGND in audio design in Sheet 5 C 2016 10 14 Eden LI...

Page 4: ...Module Series EC25 Reference Design EC25_Reference_Design Confidential Released 3 4 Contents About the Document 2 Contents 3 1 Reference Design 4 1 1 Introduction 4 1 2 Schematics 4 Quectel Confident...

Page 5: ...sign Confidential Released 4 4 1 Reference Design 1 1 Introduction This document provides the reference design for Quectel EC25 module 1 2 Schematics The schematics illustrated in the following pages...

Page 6: ...37 RESERVED 38 RESERVED 39 RESERVED 40 RESERVED 41 I2C_SCL 42 I2C_SDA 43 RESERVED 44 ADC1 45 ADC0 46 GND 47 ANT_GNSS 48 GND 49 ANT_MAIN 50 GND 51 GND 52 GND 53 GND 54 GND 55 RESERVED 56 GND 57 VBAT_RF...

Page 7: ...eep WAKEUP_IN_MODULE at low level before module starts up successfully Reference Design Quectel_EC25 EC21_AT_Commands_Manual Quectel_EC25_Hardware_Design and VBUS_CTRL High level Q207 is turned on AP_...

Page 8: ...ly must be able to provide sufficient current up to 2A or more 3 The recommended operating voltage of VBAT is 3 3V 4 3V Supply Power for PCM Codec Reference Design Note 2 2 RC circuit which is assembl...

Page 9: ...low level and high level detections For more details please refer to 1 The decouple capacitor of USIM_VDD should be less than 1uF and must be near to USIM socket Notes Note It is recommended to use a...

Page 10: ...D 7 AGND 10 LOUTR N 11 CPN2 12 CPP2 13 CPN1 14 CPP1 15 CPVDD 16 CPVPP 18 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 V...

Page 11: ...unction is ON by default If diversity antenna is not used there is a need to use AT command to turn off diversity reception 5 ESD protection devices should be added to the GNSS antenna interface and t...

Page 12: ...ld keep a distance of 3 times of its trace width from other signal lines 1 MDC 2 RSTN 3 LX 4 VDD33 5 INT 6 XTLO 7 XTLI 8 AVDDL 9 RBIAS 10 VDDH_REG 11 TRXP0 12 TRXN0 13 AVDDL 14 TRXP1 15 TRXN1 16 AVDD3...

Page 13: ...round transformers is prohibited for better ESD protection performance 5 For better EMI suppression performance do not route in top layer weak pull up down configuration signal 0 0 0 0 0 0 0 0 0 0 0 0...

Page 14: ...0K 1 GND 2 RESERVED 3 RESERVED 4 DBG_TXD 5 LTE_UART_TXD 6 LTE_UART_RXD 7 BT_UART_RTS 8 BT_UART_CTS 9 WLAN_EN 10 BT_EN 11 VIO 12 GND 20 GND 21 VDD_3V3 22 SDIO_D3 23 SDIO_D2 24 SDIO_D1 25 SDIO_D0 26 SDI...

Page 15: ...used to upgrade firmware Junction capacitance of ESD component on USB data lines might influence the signal please pay attention to it Typically the capacitance should be less than 1pF Note When USB_...

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