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Controls/MCUs  

Change orientation detection trip points

Posted: 14 May 2009     Print Version  Bookmark and Share

Keywords:MMA7660FC  orientation detection  mobile phones 

The MMA7660FC has the built-in capability to do orientation detection. This feature gives the customer the ability to do applications such as portrait/landscape in mobile phones, portable media players and PDAs. The MMA7660FC provides six different positions: left, right, up, down, back and front. The tilt orientation of the device is in three dimensions and is identified in its last known static position. The trip points for up/down/left/right occur at approximately 45° from horizontal. The back/front interrupts occur at approximately 15° from horizontal. This allows a product to set its display orientation appropriately to either portrait or landscape mode or to turn off the display when the device is placed upside down.

This application note by Freescale Semiconductor Inc. explains how to use software enhancements using an MCU to configure the MMA7660FC to do orientation detection, beyond what the sensor could provide given its internal functionality.

View the PDF document for more information.





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