Sensor Calibration on SSC7102 Bosch Sensor Fusion
Solution for Windows 8
Tom Tse
Microchip Technology
This document provides information regarding end of line sensor calibration guidance for Windows 8.x using Microchip’s
SSC7102 Bosch Sensor Fusion (BSX) Solution. It provides information that will assist a customer in passing WHQL and
determine if the results are sufficient.
This document is written for system designers who have a background and are familiar with the sensor platform for Windows 8 and WHQL process.
The following documents should be referenced when using this application note. See your Microchip representative for
SSC7102 Data Sheet, DS00001654
SSC7102 Bosch Sensor Fusion Firmware Addendum, DS00001657
SSC7102 Base Board Assy 6730A Rev. A1.0 Schematics
SSC7102 Bosch Module Assy 6731A Rev. A1.4 Schematics
Microsoft “Windows 8 Sensor Calibration and Configuration Persistence” White Paper, September 28, 2012
Microsoft “Integrating Motion and Orientation Sensors” White Paper, June 10, 2013
Microsoft “Guide to Running WHCK Motion Sensor Tests”, Version 0.9, August 14, 2013
Bosch Sensors Calibration Presentation and Application Notes, please contact Bosch for this documentation
• Multiple Accelerometers Inline Calibration (Bosch Document Number: BST-MAS-AN030-00) Application Note,
Rev 1.0, December 2, 2013
• Refer to sensor vendors’ data sheet and application notes for layout and placement guidance, for example
- Bosch BMC Handling, (Bosch Document Number: BST-MCSHS000-00) placement, and mounting guideline,
Version 1.0, April 4, 2011
- Bosch BMC PCB placement guideline (Bosch Document Number: BST-MCS-AN002-00) Application Note,
Version 1.0, March 25, 2011
Sensors, like accelerometers, magnetometers, and gyroscopes, are used in modern consumer electronic devices to
gather information in the current physical environment such as location, position, etc. of the device.
All of these sensors should be calibrated to obtain the most accurate data that reflects the physical reality of the device
as well as passing the Microsoft WHQL tests.
• The Bosch “Self-contained 9-axis sensor fusion” algorithm has fast in-use background calibration of all sensors
and meets the Microsoft Windows 8 specification.
• There is no need to build a sample set of boards to help calibrate sensors. The exception is when a magnetometer
is placed near metal devices or large current traces.
- Need one sample to calibrate magnetometer.
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DS00001661B-page 1
• All sensors have close to 2X margin to meet Windows 8 accuracy requirements. For example, inclination accuracy
is 3 degrees, and specification is 5 degrees.
• No end of line calibration is required for WHQL certification. However, if high accuracy is required in the application, only accelerometer calibration is required. Please see application note “Multiple Accelerometers: Inline Calibration”, Rev. 1.0, December 2, 2013 for more information on this.
DS00001661B-page 2
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Revision Level & Date
DS00001661B (04-24-14)
Calibration to meet Windows
8 WHQL requirement
Added a note about end of line calibration.
DS00001661A (01-22-14)
Initial Release
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DS00001661B-page 3
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