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Electrocardiogram (ECG) heart data is a more complex measurement than a simple heart rate measurement expressed in beats per minute (BPM). ECG measurement and analysis are becoming popular functions for fitness applications, but they are also essential parts of many medical device designs. As medical remote patient monitoring becomes more important, the need for wearable ECG capability has become critical. Our Connected, Wearable ECG Demonstration Board can be used in the design of advanced fitness tracking devices and can also be designed into medical wearable remote patient monitoring and diagnostic systems.

This demo features the SAM L22 high-performance, 32-bit Arm® Cortex®-M0+ based microcontroller (MCU) with ultra-low-power technology, the BTLC1000 Bluetooth® Low Energy (BLE) 4.1 module, the ATECC508A CryptoAuthentication™ IC and the NeuroSky® CardioChip ECG Biosensor.

The ECG demo measures complex heart rate and computes other heart related data. Patient movement is also tracked via an on-board accelerometer. The BTLC1000 BLE module on this board allows the demo to communicate with tablets, smartphones or PCs for IoT capability.

Design Files Download

Start with the free download of the user guide, schematics and 'C' source code that can easily be modified to your specific application needs.

This demo is not for sale. Please download the design files for your evaluation and prototype development.

This reference demo helps you develop a portable/wearable, connected ECG board design with Bluetooth Low Energy capability for medical and fitness IoT applications.*

*Microchip medical reference designs and demos are intended for evaluation and development purposes only. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use.

System Diagram

Demonstration Highlights

  • Ideal for portable/wearable medical/fitness designs
  • Measures heart rate and computes heart rate variability, heart age and stress using ECG data
  • Easy development of more advanced heart-health index functions
  • Demo can also be shown using standard ECG leads
  • Bluetooth Low Energy module is used for smartphone/tablet IoT capability
  • Low overall BOM cost due to high level of integration
  • Powered from a single AAA battery

Product Features

SAM L22 MCU Features

  • Arm Cortex-M0+ based MCU running up to 32 MHz
  • Up to 256 KB embedded Flash and 32 KB SRAM
  • Low power consumption at < 39 µA/MHz
  • Segment LCD (SLCD) controller with up to 320 segments
  • Digital Memory Access (DMA), Sleepwalking and Event system
  • Up to six flexible serial communication modules (SERCOMs)
  • Up to five timers/counters
  • Full-Speed USB device
  • 12-bit Analog-to-Digital Converter (ADC) (SAM L22N: 20 channels; SAM L22J: 16 channels; SAM L22G: 10 channels)
  • Two analog comparators and programmable logic block
  • Peripheal Touch Controller (PTC) hardware touch support
  • Tamper detection
  • QFP, QFN and WLCSP package options (SAM L22N: 100 pins; SAM L22J: 64 pins; SAM L22: 48 pins)

RN4871 Bluetooth Low Energy Module Features

  • Bluetooth 5 certified
  • Easy-to-use ASCII command interface for communication with the host microcontroller
  • Module certified for use in USA, Canada, Brazil, Europe, Japan, Korea, Taiwan and China
  • Mobile application supported in Microchip Bluetooth Data (MBD)
  • Remote configuration capability
  • Ceramic chip antenna or external antenna connection

ATECC608A CryptoAuthentication Secure Element Features

  • Cryptographic co-processor with secure hardware-based key storage
  • Protected storage for up to 16 keys, certificates or data
  • FIPS SP800-56A Elliptic Curve Diffie-Hellman (ECDH)
  • NIST standard P256 elliptic curve support
  • SHA-256 and HMAC hash including off-chip context save/restore
  • AES-128 encryption/decryption, Galois Field Multiply for GCM

NeuroSky CardioChip ECG Biosensor

  • Single-chip solution for accurate bio-signal detection and processing
  • Ultra small footprint 3 mm × 3 mm package and extremely low power consumption
  • Mixed-signal SoC with integrated Analog Front End (AFE), DSP functions and choice of serial interface UART/I2C/SPI
  • Accurate ECG raw signal as well as real-time heart-rate output
  • Supports signal acquisition using dry contact electrodes
  • High-performance AFE for detection and processing of bio-signals ranging from μV to mV levels
  • Advanced Low-Noise Amplifier (LNA) and anti-alias filtering
  • High-resolution (16-bit) ADC with 512 Bytes/sec sample rate
  • Accurate on-chip heartbeat detection (24–200 bpm) and real time heart rate (± 1 bpm) computation
  • For pricing and availability contact Neurosky at sales@neurosky.com or for more information go to http://neurosky.com/biosensors/ecg-sensor/

Additional Resources

  • SAM L22 Arm Cortex M0+ based microcontroller
  • BTLC1000 ultra-low-power Bluetooth Low Energy module (not recommended for new designs); RN4871 or RN4870 Bluetooth Low Energy modules are recommended for new designs
  • ATECC508A CryptoAuthentication™ secure element (not recommended for new designs)ATECC608B CryptoAuthentication secure element is recommended for new designs
  • NeuroSky CardioChip ECG Biosensor
  • SST26VF064B 64 Mb 2.3-3.6V Serial Quad I/O (SQI) Flash
  • MIC5365 high-performance single 150 mA LDO
  • MIC94062 high-side load switch 2A, 77 mΩ
  • MCP16252 low quiescent current synchronous boost regulator
  • Contact your local sales representative to see a working demonstration of our Connected, Wearable ECG Demonstration Board

Medical Video Channel

Connected Wearable Electrocardiogram (ECG)