Product Info

LTE Standard Module Series
EG95 Series Hardware Design
EG95_Series_Hardware_Design
34 / 99
Module
USB_VBUS
USB_DP
USB_DM
AP_READY
RI
GND
Host
VDD
USB_DP
USB_DM
GPIO
EINT
GND
Figure 5: Sleep Mode Application with RI
• Sending data to EG95 via USB will wake up the module.
• When module 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 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.
The following figure shows the connection between the module and the host.
Module Host
GPIO
USB_VBUS
USB_DP
USB_DM
Power
Switch
VDD
USB_DP
USB_DM
RI EINT
AP_READY
GPIO
GND
GND
Figure 6: Sleep Mode Application without Suspend Function
Switching on the power switch to supply power to USB_VBUS will wake up the module.