PNI TCM - Manual (Page 37)

PNI Sensor Corporation DOC#1014688 r06
TCM User Manual – July 2013 Page 32
6.5.4 Sync Mode
Sync Mode enables the module to stay in Sleep Mode until the user’s system sends a
trigger to report data. When so triggered, the TCM will wake up, report data once, then
return to Sleep Mode. One application of this is to lower power consumption. Another
use of the Sync Mode is to trigger a reading during an interval when local magnetic
sources are well understood. For instance, if a system has considerable magnetic noise
due to nearby motors, the Synch Mode can be used to take measurements when the
motors are turned off.
Enter Sync Mode
On the Test tab, above the tabs and 3D model, click the “Sync Mode” check box to
enter Sync Mode.
Sync Mode Output
To retrieve the first reading, click the <Sync Read> button. Heading, pitch and roll
information will be displayed on Current Reading window. If the “Enable 3D Model
Display” box is selected on the Configuration tab, then the helicopter will follow the
movement as well. The module will enter Sleep Mode after outputting the heading,
pitch, and roll information. To obtain subsequent readings, the user should first click
on the <Sync Trigger> button to wake up the module and then click on the <Sync
Read> button to get the readings, after which the module will return to sleep.
Exit Sync Mode
Click on the <Sync Trigger> button and then uncheck the “Sync Mode” check box to
exit Sync Mode.
Note that <Sync Trigger> sends a 0xFF signal as an external interrupt to wake up the
module. This is not done for the first reading as the module is already awake.