Integration Manual

LISA-U series - System Integration Manual
3G.G2-HW-10002-A3 Preliminary System description
Page 18 of 160
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.
The application interfaces are enabled,
unless power saving configuration is
enabled by the AT+UPSV command (refer
to sections 1.9.2.3, 1.9.3.2, 1.9.4.2 and
u-blox AT Commands Manual [3]).
Power saving is not enabled by default: it
can be enabled by the AT+UPSV
command (see u-blox AT Commands
Manual [3]).
If power saving is enabled, the module
automatically enters idle-mode and
application interfaces are disabled
whenever possible (refer to sections
1.9.2.3, 1.9.3.2, 1.9.4.2 and u-blox AT
Commands Manual [3], 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,
unless power saving configuration is
enabled by the AT+UPSV command (see
section 1.9.2.3, 1.9.3.2, 1.9.4.2 and the
u-blox AT Commands Manual [3]).
When call terminates, the module
returns to the active operating mode.
Table 5: 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
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
Switch OFF:
• AT+CPWROFF
• PWR_ON (LISA-U2xx-01 only)
Figure 3: Operating modes transition