Quectel Wireless Solutions Company Limited 201807EG95NA Manuale Utente
LTE Module Series
EG95 Hardware Design
EG95_Hardware_Design 26 / 81
The following figure shows the connection between the module and the host.
USB_VBUS
USB_DP
USB_DM
AP_READY
VDD
USB_DP
USB_DM
GPIO
Module
Host
GND
GND
Figure 4: Sleep Mode Application with USB Remote Wakeup
Sending data to EG95 through USB will wake up the module.
When EG95 has a URC to report, the module will send remote wake-up signals via USB bus so as to
wake up the host.
wake up the host.
3.5.1.3. USB Application with USB Suspend/Resume and RI Function
If the host supports USB suspend/resume, but does not support remote wake-up function, the RI signal is
needed to wake up the host.
There are three preconditions to let the module enter into the sleep mode.
needed to wake up the host.
There are three preconditions to let the module enter into the sleep mode.
Execute AT+QSCLK=1 command to enable sleep mode.
Ensure the DTR is held at high level or keep it open.
The host’s USB bus, which is connected with the module’s USB interface, enters into suspended
state.
state.
The following figure shows the connection between the module and the host.
USB_VBUS
USB_DP
USB_DM
AP_READY
VDD
USB_DP
USB_DM
GPIO
Module
Host
GND
GND
RI
EINT
Figure 5: Sleep Mode Application with RI