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Summary of Contents for PNI RM3000-f
- Page 1 User Manual RM3000-f Evaluation Board 3-Axis Geomagnetic Sensor Module...
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Page 2: Table Of Contents
List of Tables Table 3-1: Absolute Maximum Ratings ..................5 Table 3-2: Operating Characteristics ..................5 Table 4-1: RM3000-f Evaluation Board Pin Assignments ............10 Table 4-2: SPI Timing Specifications ..................12 Table 5-1: Cycle Count Register Commands ................. 15 Table 5-2: SAM Axis Select Bits ..................... -
Page 3: Copyright & Warranty Information
PNI warrants that each Product to be delivered hereunder, if properly used, will, for ninety (90) days following the date of shipment unless a different warranty time period for such Product is specified: (i) in PNI’s Price List in effect at time of order acceptance;... -
Page 4: Introduction
PNI sensor coils. These advantages make PNI’s RM3000-f Evaluation Board not only the choice for prototyping high volume solutions, but also for lower volume applications that require a complete solution. -
Page 5: Specifications
2) Field measurement range is defined as the monotonic region of the output characteristic curve. 3) Resolution is the inverse of gain, but system noise can limit the useable resolution of the RM3000-f Evaluation Board. Above ~200 cycle counts there are diminishing returns on useable resolution due to system noise. -
Page 6: Typical Operating Performance
5) Operating at greater cycle counts will increase power consumption but generally not provide any benefit in useable resolution due to system noise. 35 Hz single-axis output rate represents ~12 Hz output rate for all 3 axes for the RM3000-f Evaluation Board. Also see Figure 3-3. 3.2 Typical Operating Performance The plots below are representative of performance as a function of the number of cycle counts. -
Page 7: Figure 3-2: 3-Axis Maximum Sample Rate Vs. Cycle Counts
1000 Cycle Counts Figure 3-2: 3-Axis Maximum Sample Rate vs. Cycle Counts Cycle Counts Figure 3-3: Current Consumption vs. Cycle Counts RM3000-f Evaluation Board User Manual r02 Page 7 of 19... -
Page 8: Dimensions
3.3 Dimensions Figure 3-4: Mechanical Drawing PNI Sensor Corporation Doc #1016391 r02 RM3000-f Evaluation Board User Manual Page 8 of 19... -
Page 9: Rm3000-F Evaluation Board Overview & Set-Up
4.2 RM3000-f Evaluation Board Pinout The RM3000-f Evaluation Board’s pin assignments are given in Table 4-1. Pin numbers run counterclockwise (when looking from the top), starting at the Pin 1 designator as shown in Figure 3-4Error! Reference source not found.. Since the board’s labeling differs slightly from standard SPI terminology, the standard SPI term is also given. -
Page 10: Table 4-1: Rm3000-F Evaluation Board Pin Assignments
Table 4-1: RM3000-f Evaluation Board Pin Assignments RM3000-f Eval SPI Standard Pin# Description Board Pin Name Pin Name SCLK SPI interface - Serial clock input SPI interface – Master Input, Slave Output MISO SPI interface – Master Output, Slave Input MOSI SPI interface –... - Page 11 CLEAR can be used to stop any sensor measurement in progress. CLEAR has no effect on the SPI register state. Note: The CLEAR pin is similar to the RESET pin on PNI’s legacy ASIC. However in Standard Mode the 3D MagIC automatically resets the DRDY line, so it is not necessary to use the CLEAR pin when operating in Standard Mode.
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Page 12: Spi Interface Operation
SSDV Time to setup data before active edge DBSH Time to setup data after active edge DASH Time from SSN to data tri-state time SHZD PNI Sensor Corporation Doc #1016391 r02 RM3000-f Evaluation Board User Manual Page 12 of 19... -
Page 13: Idle Mode
The RM3000-f Evaluation Board starts in the Idle Mode at power-up and remains in Idle Mode until a measurement is needed. Note: The fact that the RM3000-f Evaluation Board starts in Idle Mode at power-up is different from the legacy MicroMag modules, where it was necessary to cycle the MicroMag modules through one measurement request operation at power-up to put them into Idle Mode. -
Page 14: Operation
Single-axis measurement (SAM), and Multi-axis measurement (MAM). The SAM Command Byte initiates a measurement for one sensor and sets up the RM3000-f Evaluation Board to write the measured values out on the MISO line. The MAM Command Byte initiates a sensor measurement for up to 3 sensors, and a later Command Byte sets up the module to write the measured values out on the MISO line for up to 3 sensors. -
Page 15: Table 5-1: Cycle Count Register Commands
Since the registers are adjacent, it is not necessary to send multiple Command Bytes, as the RM3000-f Evaluation Board automatically will read/write to the next adjacent register. A sample command sequence is provided below which sets the cycle count value to 100 ) for all 3 axes. -
Page 16: Single-Axis Measurement (Sam) Operation
The SAM Command Byte initiates a sensor measurement on a single sensor, and sets up the RM3000-f Evaluation Board to output the measured values on the MISO line. SAM operation is not as efficient as MAM operation except when only one sensor is measured. -
Page 17: Making A Single-Axis Measurement
An initial MAM Command Byte initiates a sensor measurement for up to 3 sensors. After the measurements are made and the DRDY line goes HIGH, another MAM Command Byte sets up the RM3000-f Evaluation Board to output the measured values on the MISO line. 5.3.1 MAM SPI Activity Sequence The SPI activity sequence is given below for MAM operation. -
Page 18: Mam Command Byte
AAX1 AAX0 Table 5-3: MAM Axes Select Bits Axes to be Measured AAX1 AAX0 X, Y, and Z X and Y X only No axis measured PNI Sensor Corporation Doc #1016391 r02 RM3000-f Evaluation Board User Manual Page 18 of 19... -
Page 19: Making A Multi-Axis Measurement
5.3.4 Making a Multi-Axis Measurement The steps to make a multi-axis sensor measurement are given below. The RM3000-f Evaluation Board will return the result of a complete forward- reverse measurement of each sensor in a 24 bit 2’s complement format (range: -8388608 to 8388607).
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