LISA-U1 series - System Integration Manual
3G.G2-HW-10002-3
Preliminary
System description
Page 28 of 125
~30 ms
IDLE MODE
ACTIVE MODE
IDLE MODE
500-700 µA
Active Mode
Enabled
Idle Mode
Enabled
500-700 µA
2G case: ~125 mA
3G case: ~85 mA
2G case: 0.44-2.09 s
3G case: 0.61-5.09 s
IDLE MODE
2G or 3G case: ~30 ms
ACTIVE MODE
Time [s]
Current [mA]
150
100
50
0
Time [ms]
Current [mA]
150
100
50
0
5-10 mA
20-25 mA
2G case: ~125 mA
3G case: ~85 mA
PLL
Enabled
RX
Enabled
35-40 mA
DSP
Enabled
Figure 13: Description of VCC current consumption profile versus time when the module is registered with 2G or 3G networks:
the module is in idle mode and periodically wakes up to active mode to monitor the paging channel for paging block reception
1.5.3.4
2G and 3G fixed active mode (power saving disabled)
Power saving configuration is by default disabled, or it can be disabled using the appropriate AT command (refer
to
[2], AT+UPSV command). When power saving is disabled, the module doesn’t
automatically enter idle-mode whenever possible: the module remains in active mode.
The module processor core is activated during active-mode, and the 26 MHz reference clock frequency is used.
An example of the current consumption profile of the data module when power saving is disabled is shown in
Figure 14: the module is registered with the network, active-mode is maintained, and the receiver and the DSP
are periodically activated to monitor the paging channel for paging block reception.
