Usb Application With Usb Suspend/Resume And Ri Function; Usb Application Without Usb Suspend Function - Quectel EG06 Series Manual

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.

Execute AT+QSCLK=1 command to enable the 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.
The following figure shows the connection between the module and the host.

Sending data to EG06 through USB will wake up the module.

When EG06 has a URC to report, RI signal will wake up the host.

3.5.1.4. USB Application without USB Suspend Function

If the host does not support USB suspend function, USB_VBUS should be disconnected with an external
control circuit to let the module enter into sleep mode.

Execute AT+QSCLK=1 command to enable the sleep mode.

Ensure the DTR is held at high level or keep it open.

Disconnect USB_VBUS.
EG06_Hardware_Design
Module
USB_VBUS
USB_DP
USB_DM
RI
GND
Figure 6: Sleep Mode Application with RI
LTE-A Module Series
EG06 Hardware Design
Host
VDD
USB_DP
USB_DM
EINT
GND
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