PNI RM3000-F Evaluation Board - Manual (Page 15)

PNI Sensor Corporation Doc #1016391 r04
RM3000-f Evaluation Board User Manual Page 14
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 RM3000-f Evaluation Board 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 4.3. 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
5.2.2 SAM Command Byte
The SAM Command Byte is given below, and the definitions for AS1 and AS0 follow in
Table 5-2:
Bit # 7 6 5 4 3 2 1 0
Value 0 0 0 0 0 0 AS1 AS0