UMTS/HSPA Module Series
UG96 Hardware Design
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USB_VBUS
USB_DP
USB_DM
VDD
USB_DP
USB_DM
Module
GND
GND
RI
EINT
Host
Figure 4: USB Application with Suspend Function
When the host
’s USB bus returns to resume state, the module will be woken up.
3.5.1.3. USB Application without Suspend Function
If the host communicates with module via USB interface, and does not support USB suspend function,
USB_VBUS should be disconnected with an external control circuit to let the module enter into sleep
mode.
⚫
Execute
AT+QCFG="uart/power",0,0
to set UART into auto on/off mode.
⚫
Execute
AT+QSCLK=1
to enable the sleep mode.
⚫
Disconnect USB_VBUS.
Supplying power to USB_VBUS will wake up the module.
The following figure shows the connection between the module and host.
USB_VBUS
USB_DP
USB_DM
VDD
USB_DP
USB_DM
Module
Host
RI
EINT
Power
Switch
GPIO
GND
GND
Figure 5: Sleep Mode Application without Suspend Function