Product Info

Automotive Module Series
AG35 Hardware Design
AG35_Hardware_Design 39 / 129
USB_VBUS
USB_DP
USB_DM
VDD
USB_DP
USB_DM
Module
Host
GND GND
Figure 5: Sleep Mode Application with USB Remote Wakeup
 Sending data to AG35 through USB will wake up the module.
 When AG35 has URC to report, the module will send remote wake-up signals via USB bus so as to
wake up the host.
3.5.1.3. USB Application with USB Suspend/Resume and RI Functions
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.
The following figure shows the connection between the module and the host.
USB_VBUS
USB_DP
USB_DM
VDD
USB_DP
USB_DM
Module Host
GND GND
RI EINT
Figure 6: Sleep Mode Application with RI