LISA-U2 series - System integration manual
UBX-13001118 - R27
System description
Page 77 of 183
C1-Public
The module firmware can be upgraded over the USB interface using the u-blox EasyFlash tool or by
means of an AT command (for more details, see section
and the Firmware update application
note
The USB drivers are available for the following operating system platforms:
•
Windows XP
•
Windows Vista
•
Windows 7
•
Windows 8
•
Windows 8.1
•
Windows 10
•
Windows CE 5.0
•
Windows Embedded CE 6.0
•
Windows Embedded Compact 7
•
Windows Embedded Automotive 7
•
Windows Mobile 5
•
Windows Mobile 6
•
Windows Mobile 6.1
•
Windows Mobile 6.5
LISA-U2 modules are compatible with standard Linux/Android USB kernel drivers.
1.9.3.2
USB and power saving
The modules automatically enter the USB suspended state when the device has observed no bus
traffic for a specific time period according to the USB 2.0 specification
. In suspended state, the
module maintains any USB internal status as a device. In addition, the module enters the suspended
state when the hub port it is attached to is disabled. This is referred to as a USB selective suspend.
If the USB is suspended and a power saving configuration is enabled by the AT+UPSV command, the
module automatically enters the low-power idle mode whenever possible, but it wakes up to active
mode according to any required activity related to the network (e.g. the periodic paging reception
described in section
) or any other required activity related to the functions / interfaces of the
module.
The USB exits suspend mode when there is bus activity. If the USB is connected and not suspended,
the module is forced to stay in active mode, and so the AT+UPSV settings are overruled, but they still
have effect on the power saving configuration of the other interfaces.
The modules are capable of USB remote wake-up signaling: i.e. it may request the host to exit suspend
mode or selective suspend by using electrical signaling to indicate a remote wake-up, for example due
to an incoming call, URCs, or data reception on a socket. The remote wake-up signaling notifies the
host that it should resume from its suspended mode, if necessary, and service the external event.
Remote wake-up is accomplished using electrical signaling described in the USB 2.0
specifications
For the module current consumption description with power saving enabled and USB suspended, or
with power saving disabled and USB not suspended, see the sections
and LISA-U2