Owner manual

Table of Contents
1 COPYRIGHT & WARRANTY INFORMATION .................................................................. 2
2 INTRODUCTION ................................................................................................................. 3
3 SPECIFICATIONS .............................................................................................................. 4
3.1 RM3000-F EVALUATION BOARD CHARACTERISTICS ........................................ 4
3.2 TYPICAL OPERATING PERFORMANCE ................................................................ 5
3.3 DIMENSIONS ............................................................................................................ 7
4 RM3000-F EVALUATION BOARD OVERVIEW & SET-UP .............................................. 8
4.1 PCB ORIENTATION AND OUTPUT POLARITIES .................................................. 8
4.2 RM3000-F EVALUATION BOARD PINOUT ............................................................. 8
4.3 SPI INTERFACE OPERATION ............................................................................... 10
4.4 IDLE MODE ............................................................................................................. 11
5 OPERATION ..................................................................................................................... 12
5.1 CYCLE COUNT REGISTERS ................................................................................. 12
5.2 SINGLE-AXIS MEASUREMENT (SAM) OPERATION ........................................... 14
5.2.1 SAM SPI Activity Sequence ....................................................................... 14
5.2.2 SAM Command Byte .................................................................................. 14
5.2.3 Making a Single-Axis Measurement ........................................................... 15
5.3 MULTI-AXIS MEASUREMENT (MAM) OPERATION ............................................. 16
5.3.1 MAM SPI Activity Sequence ...................................................................... 16
5.3.2 MAM Command Byte ................................................................................. 16
5.3.3 MAM Axes Select Byte ............................................................................... 17
5.3.4 Making a Multi-Axis Measurement ............................................................. 17
APPENDIX – SAMPLE CODE ................................................................................................ 19
List of Figures
Figure 3-1: Gain & Sensitivity vs. Cycle Counts ....................................................................... 5
Figure 3-2: 3-Axis Maximum Sample Rate vs. Cycle Counts .................................................. 6
Figure 3-3: Current Consumption vs. Cycle Counts ................................................................. 6
Figure 3-4: Mechanical Drawing ............................................................................................... 7
Figure 4-1: SPI Timing Diagram ............................................................................................. 11
Figure 5-1: SPI Activity Sequence Diagram for SAM Operation ............................................ 14
Figure 5-2: SPI Activity Sequence Diagram for MAM Operation ........................................... 16
List of Tables
Table 3-1: Absolute Maximum Ratings .................................................................................... 4
Table 3-2: Operating Characteristics ........................................................................................ 4
Table 4-1: RM3000-f Evaluation Board Pin Assignments ........................................................ 8
Table 4-2: SPI Timing Specifications ..................................................................................... 11
Table 5-1: Cycle Count Register Commands ......................................................................... 13
Table 5-2: SAM Axis Select Bits ............................................................................................. 15
Table 5-3: MAM Axes Select Bits ........................................................................................... 17