Ublox TOBY-R2 Series, Руководство по системной интеграции

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TOBY-R2 series - System integration manual
UBX-16010572 - R10 System description Page 63 of 151
Threshold Definitions
When the application of cellular module operates at extreme temperatures with Smart Temperature
Supervisor enabled, the user should note that outside the valid temperature range the device will
automatically shut down as described above.
The input for the algorithm is always the temperature measured within the cellular module (Ti,
internal). This value can be higher than the working ambient temperature (Ta, ambient), as (for
example) during transmission at maximum power a significant fraction of DC input power is
dissipated as heat This behavior is partially compensated by the definition of the upper shutdown
threshold (t
+2
) that is slightly higher than the declared environmental temperature limit.
The temperature thresholds are defined according the Table 19 .
Symbol Parameter Temperature
t
-2
Low temperature shutdown –40 °C
t
-1
Low temperature warning –30 °C
t
+1
High temperature warning +77 °C
t
+2
High temperature shutdown +97 °C
Table 19: Thresholds definition for Smart Temperature Supervisor
☞
The sensor measures board temperature inside the shields, which can differ from ambient
temperature.
1.14.16 Power saving
The power saving configuration is by default disabled, but it can be enabled using the AT+UPSV
command (for the complete description of the AT+UPSV command, see the u-blox AT commands
manual
[2] ).
When power saving is enabled, the module automatically enters the low power idle-mode whenever
possible, reducing current consumption (see section
1.5.1.5 , TOBY-R2 series data sheet [1] ).
During the low power idle-mode, the module is temporarily not ready to communicate with an external
device, as it is configured to reduce power consumption. The module wakes up from low power
idle-mode to active-mode in the following events:
 Automatic periodic monitoring of the paging channel for the paging block reception according to
network conditions (see
1.5.1.5 , 1.9.1.4 )
 Automatic periodic enable of the UART interface to receive / send data, with AT+UPSV=1
(see
1.9.1.4 )
 RTS input set ON by the host DTE, with HW flow control disabled and AT+UPSV=2 (see 1.9.1.4 )
 DTR input set ON by the host DTE, with AT+UPSV=3 (see 1.9.1.4 )
 USB detection, applying 5 V (typ.) to VUSB_DET input (see 1.9.2 )
 The connected USB host forces a remote wakeup of the module as USB device (see 1.9.2.4 )
 The connected u-blox GNSS receiver forces a wakeup of the cellular module using the GNSS Tx
data ready function over GPIO3 (see
1.9.3 )
 The connected SDIO device forces a wakeup of the module as SDIO host (see 1.9.4 )

A preset RTC alarm occurs (see u-blox AT commands manual [2] , AT+CALA)
For the definition and the description of TOBY-R2 series modules operating modes, including the
events forcing transitions between the different operating modes, see the section
1.4 .