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1.5.2
Cellular operating modes
The cellular system of LENA-R8 series modules have several operating modes defined in
General status
Operating mode
Power-down
Not-powered mode VCC supply not present or below operating range: module is switched off.
Power-off mode
Normal Operation Idle mode
Active mode
Connected mode
Table 4: Module operating modes definition
The initial operating mode of LENA-R8 series modules cellular system has the VCC supply not present
or below the operating range: the modules are switched off in not-powered mode.
Once a valid VCC supply is applied to LENA-R8 series modules' cellular system, it remains switched
off in the power-off mode. Then the proper toggling of the PWR_ON input line is necessary to trigger
the switch-on routine of the modules that subsequently enter the active mode.
LENA-R8 series modules cellular system is ready to operate when in active mode. The available
communication interfaces are ready, the cellular system can accept and respond to AT commands,
entering connected mode upon cellular RF signal reception / transmission.
LENA-R8 series modules cellular system switch from active mode to the low power idle mode
whenever possible, if the low power configuration is enabled by the +UPSV AT command. The low
power idle mode can last for different time periods according to the specific +UPSV AT command
setting, according to the DRX setting, and according to the concurrent activities executed.
LENA-R8 series modules cellular system can be gracefully switched off by the +CPWROFF AT
command, or by proper toggling of the PWR_ON input line.
Connected
Figure 3: LENA-R8 series modules operating modes transitions
1.5.3
GNSS operating modes
☞
LENA-R8001 modules do not include a GNSS receiver: GNSS operating modes are not available.
The GNSS system of LENA-R8001M10 modules, based on u-blox UBX-M10050-KB GNSS receiver,
supports different operating modes. These modes represent strategies of controlling the acquisition
and tracking engines to optimize performance and power consumption.
UBX-22015376 - R02
C1-Public
Definition
VCC supply within operating range and module is switched off.
Module processor runs at the minimum frequency to save power consumption.
Module processor runs at normal operating frequency to enable related functions.
RF Tx/Rx enabled with processor running at related operating frequency.
Incoming/outgoing data, or
other dedicated network communication
No RF Tx/Rx in progress,
Communication dropped
If low power idle mode is enabled (AT+UPSV≠0),
low power idle mode is entered whenever possible
LENA-R8 series - System integration manual
Not powered
Apply VCC
Remove VCC
Power off
Switch ON:
Switch OFF:
• PWR_ON
• AT+CPWROFF
• PWR_ON
Active
Low power idle mode exit
when requested
Idle
System description
Table
4.
Page 14 of 116
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