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Offered as an attachment for various Tower® System modules, the TWRPI-MMA845XQ accelerometer accelerates your design time. It features the NXP®MMA8451Q
3-axis accelerometer with 14 bits of resolution and brings freefall/motion, pulse, and jolt detection to life in your designs. Simply place the TWRPI-MMA845XQ NXP Accelerometer Plug-In onto a parent controller or peripheral module in the Tower System, and start prototyping quickly and easily.
It is a great addition to the Kinetis® KwikStik development tool or any Tower System module containing TWRPI sockets.
AN4076: The MMA8451Q has a embedded features which include eight different sample rates, 32 different cutoff frequencies for the high-pass filter, Three dynamic ranges and four oversampling modes. It also has a 32 sample FIFO for collecting and storing data, which is the most efficient way to access the data for minimizing the I2C transactions.
AN4068: This application note targets the portrait/landscape orientation detection feature which has become standard in many handheld electronic devices. Additionally, this application note aims to explain uses as well as highlight some of the challenges of designing an embedded algorithm into the sensor.
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.
AN4071: The MMA8451, 2, 3Q has a built-in high-pass filter. In the MMA8451, 2Q the output data can go through the high-pass filter, eliminating the offset (DC) and low frequencies (well below the cutoff). Note that the MMA8453Q does not have the capability to read out data from the high-pass filter. The high-pass filter cutoff frequency can be set by the user to four different frequencies which are dependent on the Output Data Rate (ODR).