Freescale Semiconductor Document Number: MMA8452Q Data Sheet: Technical Data Rev. 8.1, 10/2013 An Energy Efficient Solution by Freescale Xtrinsic MMA8452Q 3-Axis, MMA8452Q 12-bit/8-bit Digital Accelerometer The MMA8452Q is a smart, low-power, three-axis, capacitive, micromachined accelerometer with 12 bits of resolution. This accelerometer is packed with Top and Bottom View embedded functions with flexible user programmable options, configurable to two interrupt pins. Embedded interrupt functions allow for overall power savings relieving the host processor from continuously polling data. The MMA8452Q has user selectable full scales of 2g/4g/8g with high-pass filter filtered data as well as non-filtered data available real-time. The device can be configured to generate inertial wakeup interrupt signals from any combination of the configurable embedded functions allowing the MMA8452Q to monitor events and remain in a low power mode during periods of inactivity. The MMA8452Q is available in a 3 mm x 3 mm x 1 mm QFN package. 16 PIN QFN Features 3 mm x 3 mm x 1 mm 1.95V to 3.6V supply voltage CASE 2077-02 1.6V to 3.6V interface voltage 2g/4g/8g dynamically selectable full-scale Output Data Rates (ODR) from 1.56 Hz to 800 Hz Top View 99 g/Hz noise 12-bit and 8-bit digital output 2 I C digital output interface Two programmable interrupt pins for six interrupt sources 16 15 14 Three embedded channels of motion detection VDDIO 1 13 NC Freefall or Motion Detection: 1 channel BYP 2 12 GND Pulse Detection: 1 channel Transient Detection: 1 channel INT1 NC 3 11 Orientation (Portrait/Landscape) detection with set hysteresis GND Automatic ODR change for Auto-WAKE and return to SLEEP SCL 4 10 High-Pass Filter Data available real-time GND59 INT2 Self-Test RoHS compliant 6 7 8 Current Consumption: 6 A to 165 A Typical Applications E-Compass applications Pin Connections Static orientation detection (Portrait/Landscape, Up/Down, Left/Right, Back/ Front position identification) Notebook, e-reader, and Laptop Tumble and Freefall Detection Real-time orientation detection (virtual reality and gaming 3D user position feedback) Real-time activity analysis (pedometer step counting, freefall drop detection for HDD, dead-reckoning GPS backup) Motion detection for portable product power saving (Auto-SLEEP and Auto-WAKE for cell phone, PDA, GPS, gaming) Shock and vibration monitoring (mechatronic compensation, shipping and warranty usage logging) User interface (menu scrolling by orientation change, pulse detection for button replacement) ORDERING INFORMATION Part Number Temperature Range Package Description Shipping MMA8452QT -40C to +85C QFN-16 Tray MMA8452QR1 -40C to +85C QFN-16 Tape and Reel 2010-2013 Freescale Semiconductor, Inc. All rights reserved. SDA NC SA0 NC NC VDDContents 1 Block Diagram and Pin Description . 3 1.1 Soldering Information . 5 2 Mechanical and Electrical Specifications . 6 2.1 Mechanical Characteristics . 6 2.2 Electrical Characteristics . 7 2 2.3 I C Interface Characteristics 8 2.4 Absolute Maximum Ratings 9 3 Terminology . 10 3.1 Sensitivity . 10 3.2 Zero-g Offset . 10 3.3 Self-Test 10 4 Modes of Operation . 10 5 Functionality . 11 5.1 Device Calibration . 12 5.2 8-bit or 12-bit Data 12 5.3 Low-Power Modes vs. High-Resolution Modes 12 5.4 Auto-WAKE/SLEEP Mode 12 5.5 Freefall and Motion Detection 12 5.6 Transient Detection 13 5.7 Pulse Detection . 13 5.8 Orientation Detection 13 5.9 Interrupt Register Configurations . 15 2 5.10 Serial I C Interface 15 6 Register Descriptions 18 6.1 Data Registers . 19 6.2 Portrait/ Landscape Embedded Function Registers . 23 6.3 Motion and Freefall Embedded Function Registers . 25 6.4 Transient (HPF) Acceleration Detection 30 6.5 Single, Double and Directional Pulse-Detection Registers 32 6.6 Auto-WAKE/SLEEP Detection . 36 6.7 Control Registers . 37 6.8 User Offset Correction Registers . 40 Related Documentation The MMA8452Q device features and operations are described in a variety of reference manuals, user guides, and application notes. To find the most-current versions of these documents: 1. Go to the Freescale homepage at: