LTE Standard Module Series
EG25-GL_Hardware_Design 30 / 96
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 the module through USB will wake up the module.
⚫
When the module has a URC to report, it will send remote wake-up signals via USB bus to wake up
the host.
3.2.2.2 USB Application with USB Suspend/Resume and MAIN_RI Function
If the host supports USB suspend and resume, but does not support remote wakeup function, MAIN_RI
signal is needed to wake up the host.
There are three preconditions to set the module to sleep mode.
⚫
Execute
AT+QSCLK=1
to enable the sleep mode.
⚫
Ensure the MAIN_DTR is held at high level or keep it open.
⚫
The h
ost’s USB bus, which is connected with the module’s USB interface, enters suspend 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
MAIN_RI
EINT
Figure 5: Sleep Mode Application with MAIN_RI
Содержание EG25-GL
Страница 1: ...EG25 GL Hardware Design LTE Standard Module Series Version 1 0 0 Date 2022 09 09 Status Preliminary ...
Страница 8: ...LTE Standard Module Series EG25 GL_Hardware_Design 7 96 9 Appendix References 92 ...
Страница 10: ...LTE Standard Module Series EG25 GL_Hardware_Design 9 96 Table 42 Terms and Abbreviations 92 ...