SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R08
Objective Specification
System description
Page 80 of 188
1.13.17
Power saving
The power saving configuration is by default disabled, but it can be enabled using the AT+UPSV command.
When power saving is enabled, the module automatically enters the low power idle-mode whenever possible,
reducing current consumption.
During low power idle-mode, the module is not ready to communicate with an external device by means of the
application interfaces, since it is configured to reduce power consumption. It can be woken up from idle-mode
to active-mode by the connected application processor, by the connected u-blox positioning receiver or by
network activities, as described in Table 6.
During idle-mode, the module processor core runs with the RTC 32 kHz reference clock, which is generated by:
The internal 32 kHz oscillator, in case of SARA-G340, SARA-G350 and SARA-U2 modules
The 32 kHz signal provided at the
EXT32K
input pin, in case of SARA-G300 and SARA-G310 modules
SARA-G300 and SARA-G310 need a 32 kHz signal at
EXT32K
input to reach the low power idle-mode.
For the complete description of the AT+UPSV command, refer to the
u-blox AT Commands Manual
For the definition and the description of SARA-G3 and SARA-U2 series modules operating modes, including the
events forcing transitions between the different operating modes, refer to section 1.4.
For the description of current consumption in idle and active operating modes, refer to sections 1.5.1.4, 1.5.1.5.
For the description of the UART settings related to module power saving configuration, refer to section 1.9.1.4.
For the description of the USB settings related to module power saving configuration, refer to section 1.9.3.2.
For the description of the
EXT32K
input and related application circuit design-in, refer to sections 1.6.4, 2.3.3.
