Product Info

LTE-A Module Series
EG12 Hardware Design
EG12_Hardware_Design 35 / 100
 When EG12 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.
 Keep DTR at high level (pulled up by default).
 Execute AT+QSCLK=1 command to enable the sleep mode.
 Disconnect USB_VBUS.
The following figure shows the connection between the module and the host.
USB_VBUS
USB Interface
VDD
USB Interface
Module Host
RI
EINT
Power
Switch
GPIO
GND
GND
Figure 7: Sleep Mode Application without Suspend Function
Switching on the power switch to supply power to USB_VBUS will wake up the module.
Please pay attention to the level match of the connection shown in dotted line between the module and
the host.
3.5.2. Airplane Mode
EG12 provides a W_DISABLE# signal to disable or enable airplane mode through hardware operation.
The W_DISABLE# pin is pulled up by default. Driving it to low level will let the module enter into airplane
mode.
In airplane mode, the RF function will be disabled. The RF function can also be enabled or disabled
through software AT commands. The following table shows the RF function status of the module.
NOTE