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/Title (AN4070, Motion and Freefall Detection Using the MMA8451, 2, 3Q - Application Notes)
/Author ( Freescale Semiconductor, Inc.)
/Subject (AN4070: The MMA8451, 2, 3Q has one \(1\) embedded functions for both Motion and/or Freefall along with a very flexible interrupt routing scheme. Motion is often used to simply alert the main processor that the device is currently in use. The transient function has the option of disabling the high pass filter and can behave exactly like the motion detection.)
/Keywords (AN4070, Motion Freefall Detection, MMA8451, embedded functions, interrupt routing scheme, high pass filter)
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The MMA8451, 2, 3Q has one (1) embedded functions for both Motion and/or Freefall along with a very flexible interrupt routing scheme. Motion is often used to simply alert the main processor that the device is currently in use. This can be accomplished with the Motion function and/or with the Transient function, described in AN4071. The transient function has the option of disabling the high pass filter and can behave exactly like the motion detection. This gives the user two separate programmable interrupts for motion detection if desired. The motion and freefall detection is an embedded function that can save overall system power by using an interrupt scheme. This feature alerts the main processor when a motion/tilt threshold or Freefall event has occurred. The embedded motion detection allows the user to enable and disable different axes. When the event occurs the direction of the event will be given as positive or negative acceleration.
Motion and Freefall Detection Using the MMA8451, 2, 3Q
Freescale Semiconductor, Inc.
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2011-10-31T16:01:49-07:00
2010-08-25T10:39:57Z
2011-10-31T16:01:49-07:00
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