PNI RM3100 Sensor Suite - Manual (Page 40)

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RM3100 & RM2100 Sensor Suite User Manual Page 39 of 45
5.7.2 Making and Reading Measurements
Figure 5-1 gives the SPI activity sequence for initiating a single measurement and
reading the results. The MagI2C works for either CPOL=CPHA=0 or CPOL=CPHA=1,
so both cases are given. The assumption in the diagram is that the DRDY pin or the
MISO line is used to establish when data is ready, but a query of the Status Register
could be used instead. SPI timing requirements are discussed in Section 4.4.
Figure 5-1: SPI Activity Sequence Diagram