LISA-C2 series and FW75-C200 - System Integration Manual
UBX-13000620 - R21
Early Production Information
System description
Page 32 of 103
LISA-C200 and FW75-C200 modules identify themselves by their VID (Vendor ID) and PID (Product ID)
combination, included in the USB device descriptors:
LISA-C200 and FW75-C200
•
VID = 0x05C6 PID = 0x9004
1.9.3.1
USB and power saving
When the USB port has been set as the AT command interface (at boot), sUPSV mode is not necessary
for power save mode to work, it is automatically enabled.
In summary this configuration (USB = AT Interface):
-
The +UPSV <mode> setting has no effect; power save mode is automatically enabled
-
Physical disconnection of the USB cable or suspension by the USB host will allow the module to enter
power save mode
-
The module’s current drops to the expected <2mA when then USB port is disconnected or the host goes
into sleep mode
The current consumption profiles when power saving is enabled and disabled are shown in Figure 16 & Figure
17.
On FW versions prior to x4S: the module will enter power save mode at a fixed timeout value (default), after
the host goes enters suspend mode or physical USB disconnection.
On FW version x4S and onwards, the module will enter power save mode as specified on the +UPSV
<timeout> value, after the host enters suspend mode or physical USB disconnection.
Figure 16: Current consumption profile during cyclic idle/active mode (power saving enabled)
~1.4 mA
60-70 mA
0.98s / 2.26s / 4.82 s
Time [s]
Current [mA]
IDLE MODE
Active Mode
(RX Enabled)
~300ms
