Usb Application With Usb Remote Wakeup Function - Quectel LTE-A Series Hardware Design

The following figure shows the connection between the module and the host.

Driving the host DTR to low level will wake up the module.

When EG18 has a URC to report, RI signal will wake up the host. Please refer to Chapter 3.16 for
details about RI behaviors.

3.4.1.2. USB Application with USB Remote Wakeup Function

If the host supports USB suspend/resume and remote wakeup function, the following three preconditions
must be met to let the module enter sleep mode.

Keep DTR at high level (pulled up by default).

Execute AT+QSCLK=1 command to enable the sleep mode.
 The host's USB bus, which is connected with the module's USB interface, has entered into suspend
state.
The following figure shows the connection between the module and the host.
Figure 5: Sleep Mode Application with USB Remote Wakeup
EG18_Hardware_Design
Figure 4: Sleep Mode Application via UART Interfaces
Module
USB_VBUS
USB Interface
GND
LTE-A Module Series
EG18 Hardware Design
Host
VDD
USB Interface
GND
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