Quectel EG21-G Leitfaden

EG21-G

Reference Design

LTE Standard Module Series

Rev. EG21-G_Reference_Design_V1.0

Date: 2019-12-05

Status: Released

www.quectel.com

LTE Standard Module Series

EG21-G Reference Design

EG21-G_Reference_Design 1 / 8

Our aim is to provide customers with timely and comprehensive service. For any

assistance, please contact our company headquarters:

Quectel Wireless Solutions Co., Ltd.

Building 5, Shanghai Business Park Phase III (Area B), No.1016 Tianlin Road, Minhang District, Shanghai,

China 200233

Tel: +86 21 5108 6236

Email: [email protected]om

Or our local office. For more information, please visit:

http://www.quectel.com/support/sales.htm

For technical support, or to report documentation errors, please visit:

http://www.quectel.com/support/technical.htm

Or email to: support@quectel.com

GENERAL NOTES

QUECTEL OFFERS THE INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION

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 PRIOR NOTICE.

THE INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF

QUECTEL WIRELESS SOLUTIONS CO., LTD. TRANSMITTING, REPRODUCTION, DISSEMINATION

AND EDITING OF THIS DOCUMENT AS WELL AS UTILIZATION OF THE CONTENT ARE

FORBIDDEN WITHOUT PERMISSION. OFFENDERS WILL BE HELD LIABLE FOR PAYMENT OF

DAMAGES. ALL RIGHTS ARE RESERVED IN THE EVENT OF A PATENT GRANT OR

REGISTRATION OF A UTILITY MODEL OR DESIGN.

LTE Standard Module Series

EG21-G Reference Design

EG21-G_Reference_Design 2 / 8

About the Document

Revision History

Revision

Date

Author

Description

1.0

2019-12-05

Lim PENG/

Woody WU

Initial

 LTE Standard Module Series 
 EG21-G Reference Design 
 
EG21-G_Reference_Design  3 / 8
 
 
 
Contents 
About the Document...................................................................................................................................2 
Contents.......................................................................................................................................................3 
Figure Index.................................................................................................................................................4 
1Reference Design.................................................................................................................................5 
1.1. Introduction ................................................................................................................................5
1.2. Power-on/off and Resetting Scenarios......................................................................................6
1.2.1. Power-on Scenario...........................................................................................................6
1.2.2. Power-off Scenario...........................................................................................................7
1.2.3. Resetting Scenario...........................................................................................................8
1.3. Schematics ................................................................................................................................8

LTE Standard Module Series

EG21-G Reference Design

EG21-G_Reference_Design 4 / 8

Figure Index

FIGURE 1: TIMING OF TURNING ON MODULE ............................................................................................... 6

FIGURE 2: TIMING OF TURNING OFF MODULE ............................................................................................. 7

FIGURE 3: TIMING OF RESETTING MODULE ................................................................................................. 8

LTE Standard Module Series

EG21-G Reference Design

EG21-G_Reference_Design 5 / 8

1Reference Design

1.1. Introduction

This document provides the reference design for Quectel EG21-G module. And the reference design

includes power-on/off/resetting scenarios, block diagrams of power supply and module design, UART

interfaces, (U)SIM interface, audio interfaces, etc.

LTE Standard Module Series

EG21-G Reference Design

EG21-G_Reference_Design 6 / 8

1.2. Power-on/off and Resetting Scenarios

1.2.1. Power-on Scenario

VIL≤0.5V

VH=0.8V

VBAT

PWRKEY

≥500ms

RESET_N

STATUS

(OD)

Inactive Active

UART

NOTE 1

Inactive Active

USB

≥2.5s

≥12s

≥13s

VDD_EXT

About 100ms

BOOT_CONFIG &

USB_BOOT Pins

≥100ms. After this time, the BOOT_CONFIG

pins can be set to high level by external circuit.

Figure 1: Timing of Turning on Module

1. Please make sure that VBAT is stable before pulling down PWRKEY pin. The time between them is

no less than 30ms.

2. When using MCU to control module to enter the emergency download mode, please follow the above

timing sequence. It is not recommended to pull up USB_BOOT to 1.8V before powering up VBAT.

Short the test points as shown in Figure 28 can manually force the module to enter download mode.

NOTES

LTE Standard Module Series

EG21-G Reference Design

EG21-G_Reference_Design 7 / 8

1.2.2. Power-off Scenario

VBAT

PWRKEY

≥29.5s

≥650ms

RUNNING Power-down procedure OFF

Module

Status

STATUS

(OD)

Figure 2: Timing of Turning off Module

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, the power supply

can be cut off.

2. When turning off module with the AT command, please keep PWRKEY at a high level after the

execution of the command. Otherwise, the module will turn itself back on after being shut down.

NOTES

LTE Standard Module Series

EG21-G Reference Design

EG21-G_Reference_Design 8 / 8

1.2.3. Resetting Scenario

VIL≤0.5V VIH≥1.3V

VBAT

≥150ms

Resetting

Module

Status Running

RESET_N

Restart

≤460ms

Figure 3: Timing of Resetting Module

1. Please ensure that there is no large capacitance with the max value exceeding 10nF on PWRKEY

and RESET_N pins.

2. RESET_N only resets the internal baseband chip of the module and does not reset the power

management chip.

3. It is recommended to use RESET_N only when failing to turn off the module by AT+QPOWD

command or PWRKEY pin.

1.3. Schematics

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

NOTES

EG21-G Reference Design

2019/12/5

DATE

1.0

114

VER

TITLE

SIZE

PROJECT

Quectel Wireless Solutions

6543 21

SHEET

DRAWN BY

CHECKED BY

Woody WU

Lorry XU

Power Supply Block Diagram

DC-DC

DC 5V OUT

e.g. DC 12V IN DC 3.8V @2.0A

EG21-G

MIC29302WU

MOS ON/OFF USB_VBUS

VBAT_EN

SGM2019-ADJYN5G/TR DC 3.3V

SGM2019-ADJYN5G/TR DC 1.8V

CODEC_

VDD_EXT

MIC29302WU

ALC5616

TLV320AIC3104

Codec

VBUS_CTRL EN

POWER_EN

SD card

MOS ON/OFF

DC 3.3V @0.8A

SD_PWR_EN

SGMII

DC 3.3V @0.8A

51K

Andere Handbücher für EG21-G

Inhaltsverzeichnis

Andere Quectel GSM/GPRS-Modul Handbücher

Quectel

Quectel FC800L Bedienungsanleitung

Quectel

Quectel MC60 Leitfaden

Quectel

Quectel SC200E Series Bedienungsanleitung

Quectel

Quectel UG96 Beilage

Quectel

Quectel GL100 Bedienungsanleitung

Quectel

Quectel BG95 Series Beilage

Quectel

Quectel M10 Bedienungsanleitung

Quectel

Quectel RM505Q-AE Bedienungsanleitung

Quectel

Quectel 5G-M2 EVB Bedienungsanleitung

Quectel

Quectel EG12 Series Beilage

Quectel

Quectel EC21 Mini PCIe Series Beilage

Quectel

Quectel Mini PCIe-C EVB Bedienungsanleitung

Quectel

Quectel LC79D (A) EVB Bedienungsanleitung

Quectel

Quectel EG91 Series Beilage

Quectel

Quectel BC65-TE-B Bedienungsanleitung

Quectel

Quectel BC68 Bedienungsanleitung

Quectel

Quectel UMTS<E EVB R2.0 Bedienungsanleitung

Quectel

Quectel UC20 Bedienungsanleitung

Quectel

Quectel BG950A-GL Bedienungsanleitung

Quectel

Quectel M10 Einrichtungshandbuch

Quectel

Quectel AF20 Beilage

Quectel

Quectel L89 R2.0 Bedienungsanleitung

Quectel

Quectel UC20 Installationshandbuch

Quectel

Quectel BG96 Montage- und Bedienungsanleitung

Beliebte GSM/GPRS-Modul Handbücher anderer Marken

Laird

Laird BL600 Series Kurzanleitung zur Einrichtung

Smartgen

Smartgen SG361 Bedienungsanleitung

Vanderbilt

Vanderbilt SPCN320 Bedienungsanleitung

Neoway

Neoway M590E V1 Installations- und Betriebshandbuch

Gilbarco

Gilbarco PA025800 Series Kurzanleitung

Fracarro

Fracarro ESP-CT-GSM Bedienungsanleitung

Bosch

Bosch Multicom BMC-3G Bedienungsanleitung

Zte

Zte MG2639 Bedienungsanleitung

Airlink101

Airlink101 Raven G3210 Bedienungsanleitung

Vanderbilt

Vanderbilt SPCN310 Bedienungsanleitung

Thitronik

Thitronik GSM-pro Bedienungsanleitung

Teknim

Teknim TXM-0502 Bedienungsanleitung

Safeline

Safeline LYRA Bedienungsanleitung

mangOH

mangOH Green Bedienungsanleitung

Campbell

Campbell Airlink Raven X-Telus Bedienungsanleitung

Ai-Thinker

Ai-Thinker A9G Bedienungsanleitung

Autoplugin

Autoplugin PGSM4 Bedienungsanleitung

GOSUNCN

GOSUNCN WeLink ME3616 Bedienungsanleitung