SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R11
System description
Page 18 of 157
Mode
Description
Transition between operating modes
Deep-Sleep
Only the internal 32 kHz reference is active.
The RF section and the application interfaces
are temporarily disabled and switched off: the
module is temporarily not ready to
communicate with an external device by
means of the application interfaces as
configured to reduce the current consumption.
The module enters the low power deep sleep
mode (entering the Power Saving Mode
defined in 3GPP Rel.13) whenever possible, if
power saving configuration is enabled by
AT+CPSMS command (see the SARA-R4/N4
series AT Commands Manual
), reducing
Power saving configuration is not enabled by
default; it can be enabled by AT+CPSMS (see
the SARA-R4/N4 series AT Commands Manual
The modules automatically switch from the active mode to low
power deep sleep mode whenever possible, upon expiration of the
6 seconds AT inactivity timer, and upon expiration of “Active Timer”,
entering in the Power Saving Mode defined in 3GPP Rel.13, if power
saving configuration is enabled (see
, AT+CPSMS command).
When in low power deep sleep mode, the module switches on to
the active mode upon expiration of “Periodic Update Timer”
according to the Power Saving Mode defined in 3GPP Rel.13 (see
and the SARA-R4/N4 series AT Commands Manual
AT+CPSMS command), or it can be switched on to the active mode
by the host processor using the PWR_ON input pin (see section
).
Idle
Module is switched on with application
interfaces temporarily disabled: the module is
temporarily not ready to communicate with an
external device by means of the application
interfaces as configured to reduce the current
consumption.
The module enters the low power idle mode
whenever possible, if low power configuration
is enabled by AT+UPSV command (see the
SARA-R4/N4 series AT Commands Manual
),
reducing current consumption.
Low power configuration is not enabled by
default; it can be enabled by AT+UPSV (see
the SARA-R4/N4 series AT Commands Manual
The modules automatically switch from the active mode to low
power idle mode whenever possible, upon expiration of the 6
seconds AT inactivity timer, if low power configuration is enabled
(see the SARA-R4/N4 series AT Commands Manual
, AT+UPSV
command).
When in low power idle mode, the module switches to the active
mode upon data reception over UART serial interface. The first
character received in low power idle mode wakes up the system: it
is not recognized as valid communication character, and the
recognition of the subsequent characters is guaranteed only after
the complete system wake-up.
