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M14A2A User Manual
4.
Power
4.1.
Module power states
In the operational modes, the system can be configured to use the different power states .
The system state is selected according to the permissions, required activity, and the available expected
time until the next power state.
This method allows the power management to be very dynamic and flexible and to be tuned according
to the needs of each product/application and according to specific conditions.
The following table shows several main system operational modes and the different system power states
used in each mode.
If the Power states of Deep Sleep and Light Hibernation feature are required, it was recommended
to connect WAKEUP_IN and WAKEUP_OUT signal to Host. This design can make sure M14A2A can be
waked up by Host.
Table 10.
System operational modes
System Operational Mode
System Power State
Description
Idle Registered (short
paging interval)
Active
Wake up
Active
The modem is currently listening to the channel,
decoding paging message etc
Deep sleep
The modem is in deep sleep; modem state info is
fully retained on the baseband side.
Idle Registered (short
paging interval)
Active
Wake up
Active
The modem is listening for paging.
Light Hibernation
The modem state is retained in the DDR and
reconstructed when returning to active.
Idle Registered (long
paging cycle) or PSM
Active
Wake up
Active
The modem is currently listening to the channel,
decoding paging message etc.
Off
The modem stores its state info on the host, flash
memory, or other non-volatile memory. The
modem internal memory and DDR data are not
stored and are completely shut down.
Connected
Active
All different active modes
Connected long-DRX
Deep sleep
Connected short-DRX
Light sleep
Detached
Active
The modem performs scanning for networks.
Shutdown
Off
The modem is shut down.
