Ublox SAM-M10Q, Руководство по интеграции

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SAM-M10Q - Integration manual
If both EXTINTWAKE and EXTINTBACKUP are enabled at the same time, the receiver PSM operation
is completely under external control. Setting EXTINT "high" wakes up the receiver to get a position
fix and setting "low" puts the receiver into backup mode.
EXTINT pin control can also be used in continuous mode.
In PSMOO, an external wakeup source can be set. Any wake-up event will restart the receiver to try
to obtain a position fix. Wakeup signals have no effect if the receiver is already in the "Acquisition",
"Tracking", or "POT" state.
Setting the update period POSUPDATEPERIOD to zero causes the receiver to wait in the "Inactive
for update" state until the host wakes it up. Setting the search period ACQPERIOD to zero causes
the receiver to wait in the "Inactive for search" state indefinitely after an unsuccessful startup.
External wake-up source is required when setting update or search period to zero.
The wake-up sources are:
• Rising or falling edge on the UART RX pin
• Rising or falling edge on the EXTINT pin
• Rising or falling edge on the SPI CS pin
• Rising edge on RESET_N pin
Backup modes can also be used to control the receiver state externally.
2.6.2.6 Configuration
Power save mode (PSM) is enabled and disabled with CFG-PM-OPERATEMODE and configured with
items in the CFG-PM group listed in
Table 12 .
When using power save mode on/off (PSMOO) operation, set the OPERATEMODE as the
last PSM configuration key to prevent the receiver entering the off state before all intended
PSM configuration keys are set.
Config key Description
OPERATEMODE Receiver mode of operation
POSUPDATEPERIOD Time between two position fix attempts in on/off power save mode
ACQPERIOD Time between two acquisition attempts if the receiver is unable to get a position fix
GRIDOFFSET Time offset of update grid with respect to start of week
ONTIME Time the receiver remains in the "Tracking" state and produces position fixes
MINACQTIME Minimum time the receiver spends in the "Acquisition" state
MAXACQTIME Maximum time in the "Acquisition" state
DONOTENTEROFF Receiver does not enter the "Inactive for search" state if it cannot get a position fix but
keeps indefinitely attempting a position fix instead
WAITTIMEFIX Wait for time fix before entering the "Tracking" state
UPDATEEPH Enables periodic ephemeris update
EXTINTWAKE Enables EXTINT pin control to force receiver on
EXTINTBACKUP Enables EXTINT pin control to force receiver in backup
EXTINTINACTIVE Enter a backup state if EXTINT pin is inactive longer time than specified by
EXTINTINACTIVITY
EXTINTINACTIVITY Specifies the inactivity period
Table 12: Power save mode configuration options in the CFG-PM group
OPERATEMODE The mode of operation to use mainly depends on the update period: For short
update periods (in the range of a few seconds), cyclic tracking should be configured. For long update
UBX-22020019 - R01 2 Receiver functionality Page 29 of 72
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