Ublox LISA-U2 Series, System Integration Manual

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LISA-U2 series - System integration manual
UBX-13001118 - R27 System description Page 16 of 183
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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 the u-
blox AT commands manual [2] ).
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 the u-blox AT commands
manual [2] ).
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
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