Service Guide
Table Of Contents
- Safety Information
- About the Document
- Contents
- Table Index
- Figure Index
- 1 Introduction
- 2 Product Overview
- 3 Operating Characteristics
- 4 Application Interfaces
- 5 Antenna Interfaces
- 6 Electrical Characteristics & Reliability
- 7 Mechanical Information
- 8 Storage, Manufacturing & Packaging
- 9 Appendix References
LTE Standard Module Series
EG915U_Series_Hardware_Design 29 / 81
3.2.2.2. USB Application with USB Suspend/Resume and MAIN_RI Wakeup Function
If the host supports USB Suspend/Resume, but does not support remote wakeup function, the MAIN_RI
signal is needed to wake up the host.
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
⚫ Sending data to the module through USB will wake up the module.
⚫ When the module has a URC to report, the URC will trigger the behavior of MAIN_RI pin.