User's Manual

LISA-U1/LISA-H1 series - System Integration Manual
3G.G2-HW-10002-2 Advance Information System description
Page 15 of 116
Operating Mode
Description
Features / Remarks
Transition condition
Active-Mode
Microprocessor runs with
26 MHz as reference
oscillator.
The module is prepared to
accept data signals from an
external device.
Module is switched on and is fully active.
Power saving is not enabled by default: it
can be enabled by the AT+UPSV
command (see u-blox AT Commands
Manual [2])
The application interfaces are enabled.
If power saving is enabled, the module
automatically enters idle mode whenever
possible (refer to u-blox AT Commands
Manual [2], AT+UPSV).
Connected-Mode
Voice or data call enabled.
Microprocessor runs with
26 MHz as reference
oscillator.
The module is prepared to
accept data signals from an
external device.
The module is switched on and a voice
call or a data call (2G/3G) is in progress.
Module is fully active.
The application interfaces are enabled.
When call terminates, the module
returns to the last operating state (Idle or
Active).
Table 2: Module operating modes summary
Transition between the different modes is described in Figure 3.
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
AT+CPWROFF
(no HW pin)
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
ActiveConnected Idle
Figure 3: Operating modes transition