MMA8450QT datasheet(6/57 Pages) FREESCALE

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Sensors

Freescale Semiconductor

MMA8450Q

Application Notes for Reference

The following is a list of Freescale Application Notes written for the MMA8450Q:

• AN3915, Embedded Orientation Detection Using the MMA8450Q

• AN3916, Offset Calibration of the MMA8450Q

• AN3917, Motion and Freefall Detection Using the MMA8450Q

• AN3918, High Pass Filtered Data and Transient Detection Using the MMA8450Q

• AN3919, MMA8450Q Single/Double and Directional Tap Detection

• AN3920, Using the 32 Sample First In First Out (FIFO) in the MMA8450Q

• AN3921, Low Power Modes and Auto-Wake/Sleep Using the MMA8450Q

• AN3922, Data Manipulation and Basic Settings of the MMA8450Q

• AN3923, MMA8450Q Design Checklist and Board Mounting Guidelines

Block Diagram and Pin Description

1.1

Block Diagram

Figure 1. Block Diagram

1.2

Pin Description

Figure 2. Direction of the Detectable Accelerations

12-bit

SDA

SCL

I2C

Embedded

DSP

Functions

C to V

Internal

OSC

Clock

GEN

ADC

Converter

VDD

VSS

X-axis

Transducer

Y-axis

Transducer

Z-axis

Transducer

32 Data Point

Configurable

FIFO Buffer

with Watermark

Freefall

and Motion

Detection

(2 channels)

Transient

Detection

(i.e., fast motion,

jolt)

Enhanced

Orientation with

Hysteresis

and Z-lockout

Shake Detection

through

Motion

Threshold

Tap and

Double Tap

Detection

Auto-Wake/Auto-Sleep Configurable with debounce counter and multiple motion interrupts for control

Active Mode

Auto-Wake

Normal

Mode

Low Power

Mode

Auto-Sleep

SLEEP Mode

(Reduced

Sampling Rate)

DIRECTION OF THE

DETECTABLE ACCLERATIONS

(BOTTOM VIEW)

(TOP VIEW)

MMA8450QT Datasheet(PDF) 6 Page - Freescale Semiconductor, Inc

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