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XTRINSIC-SENSE-BOARD - Freescale FRDM-KL25z and Raspbery Pi Host Platforms
The XTRINSIC-SENSE board demonstrates the capabilities of Freescale’s Xtrinsic sensors. The Xtrinsic Sensor
board includes interfacing and support for the following host platforms:
• Freescale FRDM-KL25Z
• Raspberry Pi (Model B)
The software drivers and code enable engineers to easily evaluate and demonstrate the performance of the
sensors in a variety of applications including:
• Mobile Phones/Tablet Computers
• Remote Control/Wireless Mouse
• Game Consoles
• Navigation Devices
• Medical Devices
• Xtrinsic Sense Board
• Quick Start Guide
The sensor board comes equipped with three of Freescale's new-generation XTRINSIC MEMS sensors. The
MPL3115 (U1) is designed for accurate measurement of temperature and pressure, the MAG3110 (U2) for
detection of magnetic fields, and the MMA8491 (U3) for measurement of physical positions.
The MPL3115 is a high-precision sensor used to provide accurate pressure and altitude data. It features an
adjustable sampling rate, ultra-low power consumption and intelligent functions, suitable for applications
such as mobile, medical and security devices. MPL3115 is able to provide digitized output, two separated
wake-up interrupts, minimum/maximum threshold mechanism, and autonomous data acquisition. The self
data processing ability of the MPL3115 reduces the need for communication with MCUs, which reduces
overall system power consumption.
The MAG3110 is a small, low-power, digital 3-axis magnetometer featuring a wide measurement range. It can
measure magnetic fields (the overlapped fields consisting of the geomagnetic field and the fields created by
components on PCB) on each of the 3 axes in the position where it is placed. The MAG3110 features an I2C
serial interface, and is capable of measuring magnetic fields of up to 10 Gauss with an output data rate up to
80Hz. The output data rate can vary depending on the sampling intervals and may be adjusted from 12ms to
The MMA8491Q is a low voltage, 3-axis low-g accelerometer housed in a 3 mm by 3 mm QFN package. The
device can accommodate two accelerometer configurations, acting as either an easy to implement 45° Tilt
Sensor or a digital (I2C) output accelerometer. In the 45° Tilt Sensor mode, it offers extremely easy board
implementation by using a single line of output per axis. In the digital output mode, 14-bit ±8g raw data can
be read from the device with high 1 mg/LSB sensitivity. The extreme low power capabilities of the
MMA8491Q reduce the low data rate current consumption to less than 400 nA per Hz.
Freescale Freedom FRDM-KL25Z
The FRDM-KL25Z features a KL25Z128VLK - a KL2 family device boasting a max operating frequency of 48MHz,
128KB of flash, a full-speed USB controller, and loads of analog and digital peripherals. The FRDM-KL25Z has an
easy access to MCU I/O via Arduino ™ R3 compatible I/O connectors.
The board also features a programmable OpenSDA debug interface with multiple applications available including:
• Mass storage device flash programming interface
• P&E Debug interface provides run-control debugging and compatibility with IDE tools
• CMSIS-DAP interface: new ARM standard for embedded debug interface
The Raspberry Pi features a BCM2835 SoC which includes an ARM1176JZF-S 700MHz processor, VideoCore IV
GPU, and 512 MB of RAM (Model B). It also includes two USB ports and a 10/100 Ethernet controller. The
Raspberry Pi has an easy access 26-pin GPIO I/O header (2x13, 0.1” center). Four additional GPIO available on P5.
The board also features primary and secondary I2C channels.