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Plug in USB cable or enable the USB HUB controller can wake up the module.
6.2.2 USB Application (Nonsupport USB Suspend, Nonsupport
VBUS)
If the host nonsupport USB suspend and nonsupport VBUS function, the module can enter sleep mode
by disconnect USB_VBUS from the external control circuit:
Sleep:
Send AT+GTLPMMODE=1,X command to set the WAKEUP_IN pin's level of control module enter sleep
mode. Reset module, command effective.
(X=0, WAKEUP_IN pin is high level, module enter sleep mode;
X=1, WAKEUP_IN pin is low level, module enter sleep mode)
AT+CSCLK=1 command to enable sleep function.
AT+GTUSBSLEEPEN=1,1 command to set USB sleep mode
Draw out the USB cable or disable the USB HUB controller, module enter sleep mode.
Wake up:
Plug in USB cable or enable the USB HUB controller can wake up the module.
6.2.3 USB Application (Support USB Suspend)
If the host support USB Suspend/Resume. Setting USB sleep in Linux system.
Sleep:
Send AT+GTLPMMODE=1,X command to set the WAKEUP_IN pin's level of control module enter sleep
mode. Reset module, command effective.
(X=0, WAKEUP_IN pin is high level, module enter sleep mode;
X=1, WAKEUP_IN pin is low level, module enter sleep mode)
AT+CSCLK=1 command to enable sleep function.
AT+GTUSBSLEEPEN=0,0 command to set USB sleep mode
In Linux system, set the level and control of USB device as auto to suspend the devices of module.
Standing the module and host about 2 seconds, the module can enter suspend mode automatically.
Wake up:
Any operation of USB can wake up the module from sleep mode.
6.2.4 UART Application (WAKEUP_IN Pin Level Control)
When host and module connected through UART, use the following steps to make the module enter
Sleep:
Sent AT+GTLPMMODE=1,X command to set et the WAKEUP_IN pin's level of control module enter
sleep mode. Reset module, command effective.
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FIBOCOM NL668-LA Series Hardware Guide
Page 41 of 61
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