LARA-R2 series - System Integration Manual
UBX-16010573 - R02
Objective Specification
System description
Page 29 of 148
1.6.2
Module power-off
LARA-R2 series can be properly switched off by:
AT+CPWROFF command (see
u-blox AT Commands Manual
[2]). The current parameter settings are saved in
the module’s non-volatile memory and a proper network detach is performed.
An abrupt under-voltage shutdown occurs on LARA-R2 series modules when the
VCC
module supply is
removed. If this occurs, it is not possible to perform the storing of the current parameter settings in the module’s
non-volatile memory or to perform the proper network detach.
It is highly recommended to avoid an abrupt removal of the
VCC
supply during LARA-R2 series modules
normal operations: the power off procedure must be started by the AT+CPWROFF command, waiting the
command response for a proper time period (see
u-blox AT Commands Manual
[2]), and then a proper
VCC
supply has to be held at least until the end of the modules’ internal power off sequence, which
occurs when the generic digital interfaces supply output (
V_INT
) is switched off by the module.
An abrupt hardware shutdown occurs on LARA-R2 series modules when a low level is applied on
RESET_N
pin.
In this case, the current parameter settings are not saved in the module’s non-volatile memory and a proper
network detach is not performed.
It is highly recommended to avoid an abrupt hardware shutdown of the module by forcing a low level on
the
RESET_N
input pin during module normal operation: the
RESET_N
line should be set low only if reset
or shutdown via AT commands fails or if the module does not reply to a specific AT command after a time
period longer than the one defined in the
u-blox AT Commands Manual
An over-temperature or an under-temperature shutdown occurs on LARA-R2 series modules when the
temperature measured within the cellular module reaches the dangerous area, if the optional Smart
Temperature Supervisor feature is enabled and configured by the dedicated AT command. For more details see
section 1.14.15 and
u-blox AT Commands Manual
[2], +USTS AT command.
