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/Subject (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/PMP/PDAs. The MMA7660FC provides 6 different positions: left, right, up, down, back, and front. The tilt orientation of the device is in 3 dimensions and is identified in its last know static position. The trip points for up/down/left/right occur at approximately 45 degrees from horizontal. The back/front interrupts occur at approximately 15 degrees 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 explains how to use software enhancements using a microcontroller to configure the MMA7660FC to do orientation detection, beyond what the sensor could provide given its internal functionality.)
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2008-10-03T08:57:47Z
2009-09-10T13:02:49-07:00
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AN3838, How to use the MMA7660FC with a Microcontroller to do Software Enhancements to Change Orientation Detection Trip Points
Freescale Semiconductor, Inc.
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/PMP/PDAs. The MMA7660FC provides 6 different positions: left, right, up, down, back, and front. The tilt orientation of the device is in 3 dimensions and is identified in its last know static position. The trip points for up/down/left/right occur at approximately 45 degrees from horizontal. The back/front interrupts occur at approximately 15 degrees 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 explains how to use software enhancements using a microcontroller to configure the MMA7660FC to do orientation detection, beyond what the sensor could provide given its internal functionality.
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