Quectel L76 Hardware Design

GNSS Module Series
L76&L76-L_Hardware_Design 27 / 59
Power
Run time
Run time
Sleep time
Sleep time
Second run timeSecond run time
Second sleep time Second sleep time
Run time
Run time
Sleep time
Sleep time
Continuous
mode
Figure 8: Periodic Mode
1. The STANDBY pin is edge-triggered, so the modules may unexpectedly enter Periodic standby
mode when it starts. To avoid this, it is recommended to set your GPIO which controls STANDBY
pin as input before the modules start. After that, you can reset the GPIO as output to control the
STANDBY pin. If it is unused, keep it open.
2. Keep WAKEUP pin open or low before entering Periodic backup mode. Or else, the Periodic
backup mode will be unavailable.
3. Before entering Periodic mode, assure the modules are in the tracking mode; otherwise, the
modules will have a risk of failure to track the satellite. If GNSS module is located under weak signal
environment, it is better to set a longer Second run time to ensure the success of reacquisition.
3.3.5. GLP Mode
The GLP (GNSS Low Power) mode is an optimized solution for wearable fitness and tracking devices. It
reduces power consumption by disabling high accuracy positioning.
In GLP mode, the modules provide relatively good positioning performance walking or running in dynamic
scenarios. The modules automatically switch to Continuous mode under challenged environment to keep
better accuracy. As a result, the modules can still achieve maximum performance with the lowest power
consumption.
Software commands can make the modules enter or exit from GLP mode. For more information about
these commands, see document [1].
NOTE

Quectel L76 Specifications

General

Brand	Quectel
Model	L76
Category	Motherboard
Language	English