SAM-M10Q - Integration manual
2.5 Security
The security concept of SAM-M10Q covers the air interface between the receiver and the
GNSSsatellites, the integrity of the receiver itself and the interface to the host system.
There are functions to monitor/detect certain security threads and report it to the host system.
Other functions try to mitigate the thread and allow the receiver to operate normally. Message
authentication feature in SAM-M10Q enables secure interface to host.
2.5.1 Configuration locking
The receiver configuration can be locked so that further changes are no longer possible. The
configuration can be locked by setting the configuration item CFG-SEC-CFG_LOCK to "true". This
item can be set in the same way as all other configuration items on various layers.
If the configuration lock is set on any non-volatile layer (i.e., flash or BBR), the operation is
not reversible and cannot be undone. To test the function, set it in the RAM configuration
layer. After the receiver's power cycle, the information in this layer is lost and the
configuration lock is not set anymore.
2.6 Power management
u-blox receivers support different operating modes. These modes represent strategies of controlling
the acquisition and tracking engines to achieve either the best possible performance or good
performance with reduced power consumption.
2.6.1 Continuous mode
SAM-M10Q uses dedicated signal processing engines optimized for signal acquisition and tracking.
The acquisition engine actively searches for and acquires signals during cold starts or when
insufficient signals are available during navigation. The tracking engine continuously tracks and
downloads all the almanac data and acquires new signals as they become available during
navigation. The tracking engine consumes less power than the acquisition engine.
The current consumption is lower when a valid position is obtained quickly after the start of the
receiver navigation, the entire almanac has been downloaded, and the ephemeris for each satellite
in view is valid. If these conditions are not met, the search for the available satellites takes more time
and consumes more power.
2.6.2 Power save mode
Power save mode (PSM) allows a reduction in system power consumption by selectively switching
parts of the receiver on and off. It is enabled with CFG-PM-OPERATEMODE and configured with
items in the CFG-PM group.
Power save mode (PSM) has two modes of operation:
•
Power save mode cyclic tracking (PSMCT)
operation is used when position fixes are required in
short periods of 0.5 s to 10 s.
•
Power save mode on/off (PSMOO)
operation is used for periods longer than 10 s, and can be in
the order of minutes, hours, or days.
The mode of operation can be configured, and depending on the setting, the receiver demonstrates
different behavior: In on/off operation the receiver switches between phases of startup/navigation
and phases with low or almost no system activity (backup/sleep). In cyclic tracking the receiver does
not shut down completely between fixes, but uses low-power tracking instead.
UBX-22020019 - R01
2 Receiver functionality
Page 25 of 72
C1-Public
