Capabilities Overview
Feature
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Feature: I/O
Purpose: Capture of sensor and user data
Components / Capabilities:
Integrated:
- 3 Axis Accelerometer using Freescale MMA7260Q 1.5.2.4.6g Micropower MEMs Accelerometer into CPU A/D
- 3 coloured status LEDs
- Reset/user programmable on/off switch
- Tilt/vibration sensor – mimimal power sensing option which can also be used as an application input to trigger power-state transitions.
Expansion:
- Hirose ST60 series 18 position rugged mobile style external header for charging, programming and tethered sensor extensions (12 multi-purpose I/O connections).
- Hirose DF12 series 20 position internal expansion header for internal sensor daughter boards (14 multi-purpose I/O connections).
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Feature: Processing
Purpose: Control operating state, provide best signal quality, operational alerts and messages
Components / Capabilities:
MSP430
- 10Kbyte RAM, 48Kbyte Flash
- Up to 8 MHz
- 8 Channels of 12bit A/D
- Extremely low power during periods of inactivity
- Proven solution in medical sensing applications
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Feature: Storage
Purpose: No loss of data while mobile, during network outages or while changing batteries
Components / Capabilities:
MicroSD Slot
- Up to 2GByte currently available
- SD Card with data-path MUX for full-speed host transfer when docked and soft-power control with dock detection over-ride.
- NAND Flash based, ~20mA read/write power
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Feature: Communications
Purpose: High-reliability, Standards based mobility
Components / Capabilities:
802.15.4 Radio
- Chipcon CC2420
- GigaAnt Rufa 4.1 dBi Antenna
Class 2 Bluetooth Radio
- Mitsumi WML-C46N CSR based design
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Feature: Form Factor
Purpose: Wearable
Components / Capabilities:
- Minimum sensor volume in enclosure is 1.75″ x 0.8″ x 0.5″ and 10 grams without Bluetooth. Comparable to a lipstick.
- Initial durable enclosure is roughly the size of a Zippo lighter and has provisions for expansion boards and Bluetooth. The enclosure can be mounted in an MP3 player armband accessory.
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Feature: Operating Life and Power
Purpose: Long operating life, Easy maintenance and deployment
Components / Capabilities:
- Design target is 10 days while sampling 6 channels at 50Hz w/250mAH battery.
- Deep sleep shelf life is >1 year per battery specification
- Integrated Li-ion battery charger
- Ability to monitor and indicate power status
- Power control features including soft-power switching and low-battery shutdown
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