PNI RM3100 Sensor Suite - Manual (Page 16)

PNI Sensor Corporation Doc 1017252 r03
RM3100 & RM2100 Sensor Suite User Manual Page 15 of 45
4 Geomagnetic Sensor Overview & Set-Up
4.1 Overview
Figure 4-1 and Figure 4-2 provide basic schematics for implementing the RM3100 Sensor
Suite when using the SPI interface and I
2
C interface, respectively. The MagI2C is at the
center of the schematic, as it ties the user’s host controller, on the left, to the three sensor
coils, on the right. Unused sensor connections should remain floating.
Note: RM3100 and RM2100 Geomagnetic Sensors typically are used in compassing applications,
where each channel represents a Cartesian coordinate axis, X, Y, or Z. For this reason, the term
“axis” generally is used instead of “channel”.
Figure 4-1: RM3100 reference schematic – SPI Configuration