PNI RM3000-F Sensor Suite - Manual (Page 31)

PNI Sensor Corporation Doc #1016102 r04
RM3000-f & RM2000-f Sensor Suite User Manual Page 31
Start with SSN set HIGH, then set SSN to LOW.
Send 0x83 (this is the Write Command Byte to address the MSB for the X axis)
Send 0x00 (value for the MSB for the X axis)
Send 0x64 (value for the LSB for the X axis - pointer automatically increments)
Send 0x00 (value for the MSB for the Y axis - pointer automatically increments)
Send 0x64 (value for the LSB for the Y axis - pointer automatically increments)
Send 0x00 (value for the MSB for the Z axis - pointer automatically increments)
Send 0x64 (value for the LSB for the Z axis - pointer automatically increments)
Set SSN to HIGH
5.2 Single-Axis Measurement (SAM) Operation
The SAM Command Byte initiates a sensor measurement on a single sensor, and
automatically sets up the 3D MagIC to output the measured values on the MISO line. SAM
operation is less efficient than MAM operation, except when only one sensor is to be
measured.
5.2.1 SAM SPI Activity Sequence
The SPI activity sequence for SAM operation is given below. SPI timing is discussed in
Section 4.4. The Return Byte is 0x9A. Three (3) data bytes will be clocked out for a
single-axis measurement. The Command Byte is discussed below.
Figure 5-1: SPI Activity Sequence Diagram for SAM Operation