LINK™ The World’s First & Only Smart-Clasp™ technology: A watch is meant to be luxurious, fashionable and a form of self-expression. An image on the screen of a Smartwatch will never replicate or replace the beauty and craftsmanship one sees on the face of a mechanical watch. However, in our digitally driven world, watches lack functionality and connectivity. In this presentation, various design considerations for developers when engaging in hardware design and development for wearables. Talking points will include: - Graphic & GUI system display, - MCU and peripherals selection and performance consideration, - Power management solutions, - Mechanical structure and layout placement, - Chip packaging and high density circuitry design, HDI & SIP, - EMC, reliability, and production. Jianling Weng

1. Hardware
Design and
Development for
Wearable
Technologies
Developing World’s First
Smart Clasp - LINK™

2. Introduction
 Who are we?
 Wearetec Inc is a Canadian startup company
based in Toronto Ontario

3. Introduction
 What are we developing?
 LINK – world’s first smart clasp

4. Topics
 Mechanical Design of LINK
 LINK Design Strategy
 Hardware Design Considerations
 Software Design Considerations

5. Mechanical Design of LINK
 Bi-folding Clasp
 Pushbutton Locking Mechanism
 Worn Interior of the Wrist
 Curved Surface for Comfort
 Stainless Steel Casing/ Curved Sapphire
Glass for Toughness

6. Mechanical Design of LINK
 PMOLED full color display
 Capacitive, Multi-touch touch screen
 RF connectivities
 Heptic Feedback Motor
 Battery aiming 3~400mAh

7. Mechanical Design of LINK
 Typical smart watches are designed from the
electronics out
 LINK need to be highly miniaturized

8. Hardware Design Strategy
 Stage 1: Hardware concept proofing prototype
 Stage 2: Device concept proofing prototype
 Stage 3: Production ready prototype

9. Stage 1 of LINK Design
 4-layer, standard density PCBA
 QFN package ICs(MCU, BLE SoC, etc)
 Fine Pitch/Low Profile Connectors
 Debugging/Programming Interface

10. Stage 2 of LINK Design
 6-layer Very High Density PCB
 Provision of Bendable/Partial Flexible PCB
 WLCSP IC and 0201 Discrete Packaging
 Fine Pitch/Low Profile Connector
 FPC Cables

11. Stage 3 of LINK Design
 Bendable Very High Density PCB
 Integrated FPC cables for Display and Touch
Screen
 Customized Battery Pack

12. Hardware Design Considerations
 Graphic User Interface System
 MCU and Peripherals
 Battery and Power Management
 Sensors
 Bluetooth/NFC Connectivity
 EMC, Usability and Reliability

13. Display Interfaces
 MIPI
 Intel 8080
 SPI

14. Touch Screen Interface
 I2C Protocol
 Multi Touch and Gesture Recognition

15. Battery and Power Management
 300mAh Li-ion Battery
 Power Saving Modes
 BLE SoC + Main MCU Duo Processor
Structure

16. Bluetooth Connectivity
 Bluetooth Low Power
 Notification from Smartphone App
 Quick Response to Smartphone App
 Distance Monitoring/Alarm
 Audio Streaming
 Other Data Exchanging

17. NFC Connectivity
 Mobile Payment Solution
 Secure Access Control
 Contactless Control

18. Sensors/Peripherals
 Ambient Light Sensor
 6-DOF Motion Sensor
 3-axis Accelerometer and 3-axis Gyroscope
 Optional 3-axis Magnetometer
 Audio interface
 Optional Image Sensor
 Optional Health Monitor
 Body Temperature, Pulse Rate, Blood Pressure
and Oxygen Saturation

19. Related Software Design in LINK
 Smart Watch
 Fitness Band
 Smart Phone Accessary

20. Software Design Challenges and
Solutions
 Multicore Processing (Main MCU + BLE SOC)
 GUI (PMOLED + Multi-Touch Screen)
 RTOS+API
 Low Power Software Design
 Memory Size Constraints (Flash and RAM)
 Multi Platform API Support (Android, IOS and
Windows)

21. LINK Specific Challenges
 Small Screen Size Graphics
 Small Screen Size Gesture Recognition
 Low Power
 RTOS and APIs with Limited Memory
Resources
 Firmware Over-the-Air Upgradable

22. LINK Software Design
Considerations
 Main Processor
 FreeRTOS
 emWin Middleware
 LINK APIs
 BLE SoC
 BLE stack
 LINK Battery and Power Management
 BLE LINK APIs

23. APP Development
 Wearatec Inc. is seeking partnership with
software developers or software developing
companies

24. Thank You!
 Questions?