Quectel EG915U Series User Manual

LTE Standard Module Series
EG915U_Series_Hardware_Design 26 / 81
3.2. Sleep Mode
The module is able to reduce its current consumption to an ultra-low value in the sleep mode. The
following section describes power saving procedures of EG915U series module.
3.2.1 UART Application Scenario
If the host communicates with module via UART interface, the following preconditions should be met to let
the module enter sleep mode.
⚫ Execute AT+QSCLK=1 to enable sleep mode.
⚫ Drive MAIN_DTR to high level.
The following figure shows the connection between the module and the host.
MAIN_RXD
MAIN_TXD
MAIN_RI
MAIN_DTR
AP_READY
TXD
RXD
EINT
GPIO
GPIO
Module
Host
GND
GND
Figure 3: Sleep Mode Application via UART
⚫ Driving MAIN_DTR low will wake up the module.
⚫ When EG915U series has a URC to report, the URC will trigger the behavior of MAIN_RI pin. See
Chapter 4.10.3 for details about MAIN_RI behavior.
level. In this mode, the module can still receive paging, SMS, voice call and
TCP/UDP data from network normally.
Power Down Mode
In this mode, the VBAT power supply is constantly turned on and the software
stops working.

Quectel EG915U Series Specifications

General

Operating Temperature	-40°C to +85°C
Form Factor	LGA
Interface	UART, GPIO, I2C, SPI
Power Supply	3.3V to 4.3V
GNSS	GPS, GLONASS, BeiDou, Galileo, QZSS
Protocol Support	TCP/UDP/PPP/FTP/HTTP/SSL/MQTT
Certifications	CE, FCC, RoHS

Summary

Product Overview

Key Features

Lists the main technical features of the EG915U series module.

Pin Assignment

Illustrates the pin layout of the EG915U module.

Pin Description

Details the function and characteristics of each pin.

Operating Characteristics

Operating Modes

Outlines the different operating modes of the module.

Sleep Mode

Details how to reduce module current consumption in sleep mode.

Power Supply

Details power supply requirements and pins.

Turn on

Describes how to turn on the module.

Turn off

Explains procedures for turning off the module.

Reset

Explains how to reset the module using the RESET_N pin.

Application Interfaces

Analog Audio Interfaces

Describes the analog audio input and output interfaces.

USB Interface

Details the USB interface capabilities and specifications.

(U)SIM Interface

Describes the dual SIM interfaces and their support.

UART Interfaces

Describes the main, debug, and auxiliary UART interfaces.

Electrical Characteristics & Reliability

Absolute Maximum Ratings

Lists the absolute maximum ratings for power supply and voltage.

Power Supply Ratings

Details the power supply ratings of the module.

Tx Power

Specifies the transmit RF output power for different frequency bands.

Rx Sensitivity

Details the conducted RF receiving sensitivity for different bands.

Mechanical Information

Mechanical Dimensions

Shows the physical dimensions of the module.

Recommended Footprint

Provides a recommended footprint for PCB layout.