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BMC150 Datasheet(PDF) 29 Page - Bosch Sensortec GmbH |
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BMC150 Datasheet(HTML) 29 Page - Bosch Sensortec GmbH |
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29 / 142 page ![]() Datasheet eCompass BMC150 Page 29 BST-BMC150-DS000-04 | Revision 1.0 | July 2014 Bosch Sensortec © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Note: Specifications within this document are subject to change without notice. Not intended for publication. 4.3.4 Magnetic field data temperature compensation The raw register values DATAX, DATAY, DATAZ and RHALL are read out from the host processor using the BMC150 API/driver which is provided by Bosch Sensortec. The API/driver performs an off-chip temperature compensation and outputs x/y/z magnetic field data in 16 LSB/µT to the upper application layer: Figure 6: Calculation flow of magnetic field data from raw BMC150 register data The API/driver performs all calculations using highly optimized fixed-point C-code arithmetic. For platforms that do not support C code, a floating-point formula is available as well. BMC150 sensor Hardware level Software driver level BMC150 API / driver (provided by Bosch Sensortec) Application Software application level Magnetometer raw register data (DATAX, DATAY, DATAZ, RHALL) Temperature compensated magnetic field data x/y/z in signed int, (16 LSB/µT) or float Config Config |
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