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BMC156 Datasheet(PDF) 29 Page - Bosch Sensortec GmbH |
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BMC156 Datasheet(HTML) 29 Page - Bosch Sensortec GmbH |
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29 / 141 page  Data sheet eCompass BMC156 Page 29 BST-BMC156-DS000-01 | 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 BMC156 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 BMC156 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. BMC156 sensor Hardware level Software driver level BMC156 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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