The low-power MMA9555LR1 intelligent motion-sensing pedometer incorporates a 3-axis MEMS accelerometer, signal conditioning, data conversion, and a 32-bit microcontroller for use in portable and mobile consumer products.
- Targets applications such as pedometers, wearable devices, smart watches, wristbands, sleep monitors, smart earphones, and health monitoring
- Integrates sensor initialization, calibration, data compensation, and computation functions
- Provides sophisticated pedometer functionality and six-directional orientation monitoring
- Enables high accuracy step counting, stride length measurement, calorie, and activity type detection
- Includes auto-sleep/auto-wake capabilities
Feature
- High resolution 3-axis accelerometer with:
- 16-bit ADC (0.061 mg/LSB @ 2 g)
- Selectable g range (±2/4/8 g) and output data rates (488 Hz–3.8 Hz)
- One slave SPI or I2C interface operating at up to 2 Mbps for communication with the host processor
- 1.8 V supply voltage low power consumption
- 2 μA typical current at stop mode
- 117 μA for pedometer running at active and 92 μA at suspend
- 87 μA when six-direction detection mode
- Complete built-in firmware for smart sensing intelligence
- Real time and preemptive application task scheduling
- Command interpreter support command/response and streaming mode
- Low-power pedometer with rich output information
- Step counting
- Speed, distance, calorie count estimation
- Activity level (rest, walking, jogging, running)
- Six-direction detection output
- Extensive set of power-management features and low-power mode
- GPIO2–GPIO8 can be used for expanded configurable GPIO functions
- Minimal external component requirements
