Yes, a flex PCB can be used with MEMS microphones. All of our microphones are actually available on flex PCB evaluation boards so that they can be easily placed in your own system for testing. Handling considerations in the datasheets and application note AN-1068 should be followed during assembly.

Click Products at the top of the main page. There will be various MEMS product lines like Motion, Industrial, Automotive, Microphone, and Ultrasonic/ToF etc. You can choose the desired area and that will take you to the product families and components. Once you click through to a product page for a specific component, you will find all the necessary information toward the end of the page.

You can see the terms LSB/dps and LSB/g relatively in our datasheet Gyroscope Specifications and Accelerometer Specifications sections. You need to look at your Full-Scale Range setting for accelerometer and gyroscope, then find the corresponding sensitivity scale factor values from table. Those sensitivity scale factors used for converting from LSB to dps (degrees per second) and g units.

When your accelerometer full-scale range is set to ±2g, you will read 16384 LSB as 1g from the accelerometer output, hence you can make your conversions based on that. When your gyroscope full-scale range is set to ±250 dps, every 131 LSB will equate to 1dps.

In order to achieve that, one needs to make sure that the MCU on our DK board should not act as a master device. The way to accomplish that is to erase the preprogrammed Microchip/Atmel firmware. After that, one can connect the sensor pins on the DK board to another board.

I2C slave addresses can be 0x68 or 0x69 and can be configured by the logic level of the pin AP_AD0.

Most of our devices operates in mode 0 and mode 3 or mode 1 and mode 2. One can find more information in our product datasheets on how to set it up by doing key word search of “SPI mode”.

9 axis MotionTracking® combines gyroscope, accelerometer, and TMR magnetometer sensor data. The resulting angular frame is relative to both gravity (down) and north.

The advantages of 9 axis MotionTracking® over 6 axis MotionTracking® are that 9 axis MotionTracking® results are usable for navigation and other applications which require information about the angle relative to north. It also eliminates any heading drift which may be present in a 6 axis MotionTracking® solution so that users are pointed in the correct direction without delay due to recalibration.

Both accelerometers and magnetometers are noisy sensors, which means they exhibit a slow response rate (due to noisy filtering) in fast moving systems. Accelerometer measurements are also affected by motion. By using a gyroscope and sensor fusion, the sensor fusion solution will have a faster response rate and track small, quick movements much more quickly. Gyroscope sensor fusion also makes it possible to sense linear acceleration separately from gravity.

Euler angles are a representation of an angular frame, as are quaternions and rotation matrices.

Euler angles are a set of three angles, corresponding to pitch, roll, and yaw. Euler angles may be constructed according to many conventions. The axes of and ordering of ordering of pitch, roll, and yaw vary by convention.

Euler angles are not commutative. For any Euler angles A, B, a rotation A followed by B is not

(B + A) is necessarily equal a rotation B followed by A (B + A). Because of this algebraic property, Euler angles are often not very useful for signal processing applications.

Euler angles suffer from a pair of singularity points at which only two of the three angles are significant. The derivative of the Euler angles is discontinuous at this point. This condition is often called gimbal lock.

A quaternion is a number with a real and three imaginary components, q = a + i b + j c + k d

A quaternion represents a rotational frame in a form related to the angle theta and axis v of rotation, where v is a three-dimensional unit (length 1) vector, and q = sin (theta / 2) + i * vx * cos(theta/2) + i * vy * cos(theta/2) + k * vz * cos(theta/2)

You can easily convert a quaternion to Euler angles or a rotation matrix.

http://en.wikipedia.org/wiki/Quaternions_and_spatial_rotation

The DMP calculates the MotionFusion solution as a quaternion because it is the most efficient representation for mathematical applications.