Integration Manual

SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R13 System description Page 15 of 119
Mode Description Transition between operating modes
Active Module is switched on with application interfaces
enabled or not suspended: the module is ready to
communicate with an external device by means of
the application interfaces unless power saving
configuration is enabled by AT+CPSMS (see the
SARA-R4/N4 series AT Commands Manual [2]).
The modules enter active mode from power-off mode when the host
processor implements a clean switch-on procedure by using the PWR_ON
pin (see 1.6.1).
The modules enter active mode from low power deep sleep mode upon
expiration of “Periodic Update Timer” (see 1.13.9), or when the host
processor implements a clean switch-on procedure by using the PWR_ON
pin (see 1.6.1).
The modules enter power-off mode from active mode when the host
processor implements a clean switch-off procedure (see 1.6.2).
The modules automatically switch from active to low power deep sleep
mode whenever possible, if power saving is enabled (see 1.13.9).
The module switches from active to connected mode when a RF Tx/Rx data
connection is initiated or when RF Tx/Rx activity is required due to a
connection previously initiated.
The module switches from connected to active mode when a RF Tx/Rx data
connection is terminated or suspended.
Connected RF Tx/Rx data connection is in progress.
The module is prepared to accept data signals from
an external device.
When a data connection is initiated, the module enters connected mode
from active mode.
Connected mode is suspended if Tx/Rx data is not in progress. In such cases
the module automatically switches from connected to active mode and then,
if power saving configuration is enabled by the AT+CPSMS command, the
module automatically switches to low power deep sleep mode whenever
possible. Vice-versa, the module wakes up from low power deep sleep mode
to active mode and then connected mode if RF Tx/Rx activity is necessary.
When a data connection is terminated, the module returns to the active
mode.
Table 5: SARA-R4/N4 series modules operating modes description