User's Manual

LTE Module Series
BG96 Hardware Design
BG96_Hardware_Design Confidential / Released 27 / 71
 Driving the host DTR to low level will wake up the module.
 When BG96 has URC to report, RI signal will wake up the host. Refer to Chapter 3.15 for details
about RI behaviors.
 AP_READY* will detect the sleep state of the host (can be configured to high level or low level
detection). Please refer to AT+QCFG=“apready” command for details.
3.4.1.2. USB Application with USB Remote Wakeup Function
If the host supports USB suspend/resume and remote wakeup functions, the following three preconditions
must be met to let the module enter into sleep mode.
 Execute AT+QSCLK=1 command to enable the sleep mode.
 Ensure the DTR is held in 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.
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 BG96 through USB will wake up the module.
 When BG96 has URC to report, the module will send remote wake-up signals via USB bus so as to
wake up the host.
3.4.1.3. 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 sleep mode.
 Execute AT+QSCLK=1 command to enable sleep mode.
 Ensure the DTR is held in high level or keep it open.
 The host’s USB bus, which is connected with the module’s USB interface, enters into suspended
state.