OSTSen-6500 v1.0 2 of 9 Hara Systems Inc.
1. OSTSen-6500 Overview
OSTSen-6500 is a high performance motion tracking module, which is based on
InvenSense MPU-6500. The MPU-6500 is the a 6-axis Motion Tracking device that
combines a 3-axis gyroscope, a 3-axis accelerometer, and a Digital Motion
Processor™ (DMP™) all in a small 3x3x0.9mm package. It also features a 4096-byte
FIFO that can lower the traffic on the serial bus interface, and reduce power
consumption by allowing the system processor to burst read sensor data and then go
into a low-power mode. With its dedicated I2C sensor bus, the MPU-6500 directly
accepts inputs form external I2C devices. MPU-6500, with its 6-axis integration, on-
chip DMP, and run-time calibration firmware, enables manufacturers to eliminate the
costly and complex selection, qualification, and system level integration of discrete
devices, guaranteeing optimal motion performance for consumers. MPU-6500 is also
designed to interface with multiple non-inertial digital sensors, such as pressure
sensors, on its auxiliary I2C port.
The Gyroscope has a programmable full-scale range of ±250, ±500, ±1000, and
±2000 degrees/sec and very low rate noise at 0.01dps/√Hz. The accelerometer has a
user-programmable accelerometer full-scale range of ±2g, ±4g, ±8g, and ±16g.
Factory-calibrated initial sensitivity of both sensors reduces production-line calibration
requirements.
Other industry-leading features include on-chip 16-bit ADCs, programmable digital
filters, a precision clock with 1% drift from -40°C to 85°C, an embedded temperature
sensor, and programmable interrupts. The device features I2C and SPI serial
interfaces, a VDD operating range of 1.71 to 3.6V, and a separate digital IO Supply,
VDDIO from 1.7V to 3.6V.
Communication with all registers of the device is performed using either I2C at
400kHz or SPI 1MHz. For applications requiring faster communications, the sensor
and interrupt registers may be read SPI at 20MHz.
By leveraging its patented and volume-proven CMOS-MEMS fabrication platform,
which integrated MEMS wafers with companion CMOS electronics through wafer-
level bonding, InvenSense has driven the package size down to a footprint and
thickness of 3x3x0.90mm (24-pin QFN), to provide a very small yet high performance
low cost package. The device provides high robustness by supporting 10,000g shock
reliability.
2. Applications
· TouchAnywhere™ technology (for “no touch” UI Application Control/Navigation)
· MotionCommand™ technology (for Gesture Short-cuts)
· Motion-enabled game and application framework
· Location based services, points of interest, and dead reckoning
· Handset and portable gaming
· Motion-based game controllers
· 3D remote controls for Internet connected DTVs and set top boxes, 3D mice
· Wearable sensors for health, fitness and sports
3. Features of MPU-6500
3.1 Gyroscope Features
The triple-axis MEMS gyroscope in the MPU-6500 includes a wide range of features:
· Digital-output X-, Y-, and Z-axis angular rate sensors (gyroscopes) with a user-
programmable full-scale range of ±250, ±500, ±1000, and ±2000°/sec and
