Accelerometer MMA845X I2C

File:TArduinoMMA845XQAccelerometer I2C.png

Summary

NXP MMA845xQ 3-axis accelerometer with I²C interface for motion and orientation sensing.

Description

The **MMA845xQ Accelerometer** provides 3-axis acceleration data with programmable full-scale ranges, data rates, and advanced features including tap detection, orientation detection, and interrupt functionality. It features configurable filtering, sleep modes, and communicates via I²C interface.

Diagram:

Properties

• Enabled – Enables or disables the sensor (Default: True).
• Address – I²C device address (Default: S1D).
• Name – Component identifier name.
• Filter – Filter configuration:
  • Cutoff Frequency – Filter cutoff frequency setting (Default: High).
  • Enabled – Enables filtering (Default: False).
• False Processing – False processing configuration:
  • Bypass – Bypass settings:
    • Enabled – Enables bypass mode (Default: True).
• Full Scale Range – Acceleration measurement range in G.
• Mode – Operation mode:
  • High Resolution – High resolution mode (Default: False).
  • Low Power – Low power mode (Default: False).
• Offsets – Acceleration offsets:
  • X – X-axis offset (Default: 0).
  • Y – Y-axis offset (Default: 0).
  • Z – Z-axis offset (Default: 0).
• Orientation – Orientation detection:
  • Enabled – Enables orientation detection (Default: True).
  • Reset Counter – Resets orientation counter (Default: False).
  • Reduced Noise – Enables reduced noise mode (Default: False).
  • Sample Frequency – Orientation sample frequency.
• Sleep Mode – Sleep mode configuration:
  • Auto Sleep – Auto sleep enable (Default: False).
  • Mode – Sleep mode settings:
    • High Resolution – High resolution in sleep (Default: False).
    • Low Power – Low power in sleep (Default: False).
    • Sample Frequency – Sleep sample frequency.
• Standby – Standby mode (Default: False).
• Tap – Tap detection configuration:
  • Axes – Tap detection axes (3 configurable axes).
  • X – X-axis tap settings:
    • Threshold – X-axis tap threshold (Default: 0.063).
  • Y – Y-axis tap settings:
    • Threshold – Y-axis tap threshold (Default: 0.063).
  • Z – Z-axis tap settings:
    • Threshold – Z-axis tap threshold (Default: 0.063).
  • Ignore Interval – Tap ignore interval settings:
    • Double Tap – Double tap enable (Default: False).
    • Interval – Tap interval in seconds (Default: 0.2).
    • Max Double Click Interval – Maximum double click interval (Default: 81.6).
    • Max Tap Duration – Maximum tap duration in seconds (Default: 0.03).

Pins

Input Pins

• Clock – Sensor clock input.
• Reset – Reset signal input.

Output Pins

• Accelerometer: X (analog) – X-axis acceleration output in G.
• Accelerometer: Y (analog) – Y-axis acceleration output in G.
• Accelerometer: Z (analog) – Z-axis acceleration output in G.
• Orientation: Out (digital) – Orientation detection output.
• Orientation: Front Down (digital) – Front/down orientation output.
• Orientation: Lockout (digital) – Orientation lockout output.
• Tap: Single Up (digital) – Single tap up detection.
• Tap: Single Down (digital) – Single tap down detection.
• Tap: Double Up (digital) – Double tap up detection.
• Tap: Double Down (digital) – Double tap down detection.
• Interface (i2c) – I²C communication interface.

Categories

• File:TArduinoDigitalCategory.png Category Digital – Digital sensor components.
• File:TArduinoI2CCategory.png Category I2C – I²C-enabled devices.
• File:TArduinoSensorCategory.png Category Sensors – Motion sensors.
• File:TArduinoAccelerometerCategory.png Category Accelerometer – Acceleration sensors.