SC872-A
Product User Guide
Product Features
1VV0301202 Rev. 6
Page 20 of 53
2018-12-21
Backup Mode (Perpetual)
Do not enter the Perpetual Backup mode.
The SC872-A modules do not have a
Force_On pin, and a power cycle will be required to return to normal operation.
Standby Modes
In these modes, the receiver stops navigation, the internal processor enters the standby state,
and the current drain at main supply VCC_IN is substantially reduced.
STOP: ARM baseband, RF, and TCXO are powered down
SLEEP: ARM baseband and RF are powered down
To enter a Standby mode, send the following command:
$PMTK161,0*28
(STOP Mode)
$PMTK161,1*29
(SLEEP Mode)
To exit a Standby mode, send any byte to the host port (RX).
GLP Mode
In the GNSS Low Power (GLP) mode, power consumption is reduced for some time during a
one second period. The module will alternate this cycling with periods of full power when
necessary, for example weak signals or decoding the navigation message.
A typical current draw is 10 to 14 mA, depending on conditions.
Note that position accuracy will be reduced during GLP operation, therefore the user must
determine the tradeoff between power consumption and desired accuracy.
A timeline is shown below:
Figure 4-2 GNSS Low Power (GLP) mode diagram
To enter the GLP mode, send the command:
$PMTK262,3
To exit the GLP mode and return to full-power mode, send the command:
$PMTK262,0
Содержание SC872-A
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