General Description
The Freescale Semiconductor MMA7455L 3-Axis
Digital Output Accelerometer is a low power,
micro-machined sensor capable of measuring
acceleration along its X, Y, and Z axes. It
offers several convenient integrated features
including an analog to digital converter (ADC),
digital low-pass filter, and selectable sensitivity
ranges of ±2g, ±4g, or ±8g. This device can
be easily configured to detect quick motion
pulses as single-taps, double-taps, and 0g
(free-fall) conditions on any or all axes and
provides configurable interrupt pins (INT1 and
INT2) for each type of event.
Flexibility and compatibility are designed into
this module. An on-board voltage regulator
and I/O voltage level-shifters make this module
especially easy to connect to virtually any
microcontroller. It operates over a wide range
of supply voltages from 2.5 VDC to 5.5 VDC and
communicates via Serial Peripheral Interface
(SPI) or Inter-Integrated Circuit (I2C) bus.

Features
• Wide input voltage range
• Digital output (SPI/I2C)
• Selectable sensitivity: 8-bit mode
(±2g/±4g/±8g) or 10-bit mode (±8g)
• User-configurable interrupts (INT1/INT2)
• User-settable registers for calibrating
each axis
• Low current operation
• Compact, 8-pin DIP breadboard-friendly
package: 0.5” x 0.6” (12.7 x 15.2 mm)
Application Ideas
• Inertial measurement units
• Tilt sensing for remote control systems
• Single-tap or double-tap user input
• Multi-axis vibration measurement
• Free-fall detection
• Motion sensing and data logging
• Model airplane flight stabilization