LISA-U2 series - System Integration Manual
UBX-13001118 - R19
Early Production Information
System description
Page 16 of 175
Operating
Mode
Description
Transition between operating modes
Active
The module is ready to accept data signals from
an external device unless power saving
configuration is enabled by AT+UPSV (see
sections 1.9.2.3, 1.9.3.2, 1.9.4.2 and
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When the module is switched on by an appropriate power-on event
(see 1.6.1), the module enters active-mode from not-powered or
power-off mode.
If power saving configuration is enabled by the AT+UPSV command,
the module automatically switches from active to idle-mode whenever
possible and the module wakes up from idle to active-mode in the
events listed above (see the idle to active transition description).
When a voice call or a data call is initiated, the module switches from
active-mode to connected-mode.
Connected
A voice call or a data call is in progress.
When a voice or a data call is enabled, the
application interfaces are kept enabled and the
module is prepared to accept data from an
external device unless power saving
configuration is enabled by AT+UPSV (see
1.9.2.3, 1.9.3.2, 1.9.4.2 and
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When a voice call or a data call is initiated, the module enters
connected-mode from active-mode.
If power saving configuration is enabled by the AT+UPSV command,
the module automatically switches from connected to idle-mode
whenever possible in case of PSD data call with internal context
activation, and then it wakes up from idle to connected mode in the
events listed above (see the idle to active transition description).
When a voice call or a data call is terminated, the module returns to
the active-mode.
Table 5: Module operating modes description
Figure 2 describes the transition between the different operating modes.
Switch ON:
•
Apply VCC
If power saving is enabled
and there is no activity for
a defined time interval
Any wake up event described
in the module operating
modes summary table above
Incoming/outgoing call or
other dedicated device
network communication
Call terminated,
communication dropped
Remove VCC
Switch ON:
•
PWR_ON
•
RESET_N
•
RTC Alarm
Not
powered
Power off
Active
Connected
Idle
Switch OFF:
•
AT+CPWROFF
•
PWR_ON
Figure 2: Operating modes transition