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Internet-Enabled Applications

Low-Power Embedded Solutions for IoT Sensor Nodes By Alexis Alcott Sr. Product Marketing Manager, MCU16 Division Microchip Technology Inc. Internet-Enabled Applications. IoT Sensor Node. IoT Sensor Nodes Application Requirements. Low Power for Longest Possible Battery Life

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Internet-Enabled Applications

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  1. Low-Power Embedded Solutionsfor IoT Sensor NodesBy Alexis AlcottSr. Product Marketing Manager, MCU16 DivisionMicrochip Technology Inc.

  2. Internet-Enabled Applications IoT Sensor Node

  3. IoT Sensor NodesApplication Requirements • Low Power for Longest Possible Battery Life • Integrated Analog for Sensor Interface • Flexible Wireless Connection • Secure Data Transfer & Storage

  4. Low Power MCU

  5. MCU Run Power – 3 Factors Power Mode Clock Speed Program Flow

  6. MCU Power Modes RUN RAM Retention Mode DOZE IDLE SLEEP LV SLEEP DEEP SLEEP µA nA mA Core runs at slower speed, 25%-65% saved Core off, peripherals run 75% saved Core off, RAM on Most peripherals off Low V Regulator Enabled, 90% Savings Core off, RAM off Reset, peripherals off

  7. MCU Clock Speeds • Frequency • 32 MHz is 5 mA • 8 MHz is 1.3 mA • 1 MHz is 150 µA • 32 kHz is 26 µA Spans 256 Hz to 32 MHz, under software control!

  8. MCU Program Flow • Utilize peripherals that can operate while CPU is off (Idle) • ADC • Comparators • UART/SPI/I2C™ • PWMs • Timers

  9. Battery-Life EstimationWithout Power Modes • No Power modes • Battery life 47 days • Annoying! • Avg. Current 2.5 mA www.microchip.com/batterylifeestimator

  10. Adopt New Modes • Sleep during sensor acquisition • ADC runs in sleep • Use Idle mode when communicating to radio • UART active, shut down core & Flash • Sleep during radio transmission • No MCU activity required • Wait to ensure transmission successful • Deep Sleep rest of time • Use RTCC to wake up 1 sec. later

  11. Battery-Life EstimationWith Power Modes • With Power modes • Battery life is 1 year • 800% Increase! • Current Reduced 10X • Sleeping for 1 minute increases to 2 years

  12. Integrated Analog

  13. Integrated Analog Peripherals • Easy Interface to Sensors • Debugged noise and communication • Designer gets consistent analog performance across applications • Benefits of Integration • Faster data path, reduced noise • Intelligent connections inside the chip • Simplify board designs, reduce board space • Lower-cost designs, faster time to market

  14. Without Intelligent Analog ADC signal shielding increases board size Multiple power planes for analog & digital Complex routing for signals and shields Noise coupled from USB to ADC

  15. With Intelligent Analog Saved Board Area & Cost Saved Board Area & Cost Routing, shielding, power planes integrated & debugged in chip ADC, DAC, OpAmp, USB all integrated to MCU, lowers cost & space Design simplified, throughput increased

  16. PIC24 “GC” Family • 16-bit Sigma-Delta ADC • High dynamic range & high resolution • More information (3µV) eliminates need for amplifier • 12-bit ADC • Ultra-high-speed data capture at 10 Msps • High-speed sensors, touch, communications • 10-bit DACs • Analog control loops, stereo audio • Stimulus or thresholds • Operational Amplifiers • Analog control loops, Mic pre-amp, Signal conditioning • 2.5 MHz Gain-Bandwidth, low power mode • Internal Analog Connection Switch Matrix • 472-Segment LCD Driver with Voltage Boost

  17. Easy Prototyping – Add Your Sensor • On-Board Sensors • Light • Temperature • Touch • Analog Header • Clean Analog Signals • Plugs Into Breadboards • Rich Display • Connectivity • USB OTG, Host & Device • RF Module Footprint • Integrated Debugger PIC24F Intelligent Analog Starter Kit Part Number: DM240015

  18. Wireless Connection

  19. Embedded products: low power, low free resource host processors Get on the network, transfer data, and get off Communicate with other things or users via Internet Microchip Focus: Wireless Connectivity of Things

  20. How to Connect? Your Application!

  21. Embedded Wireless Portfolio

  22. Microchip’s Bluetooth® Portfolio

  23. Microchip’s Wi-Fi®Modules

  24. Microchip’s ZigBee® & MiWi™ IEEE 802.15.4 Sub-GHz MRF24XA Low power MRF49XA 433/868/915 MRF24J40 MRF89XA 868/915/950 MRF24J40MA +0dBm MRF89XAM8A 868 MHz (EU) MRF24J40MD +20dBm, PCB Ant MRF89XAM9A 915 MHz (US,CA) MRF24J40MC +20dBm, Ext Ant

  25. Flexible Wireless Connection • Use the same MCU platform, as your wireless connectivity needs change • Easy to interface to any PIC® MCU • UART or SPI • Easy daughter board to expand your PIC MCU dev board ecosystem • Certified wireless modules • Speed development time • Faster product introduction

  26. Secure Data

  27. PIC24F “GB2” Family • PIC24F “GB2” MCUs for Protecting Data in Embedded Applications • Hardware crypto engine (Industry standard AES, DES, 3DES) • Random Number Generator (RNG) • One-Time-Programmable (OTP) Key Storage • eXtreme Low Power Extends Battery Life • 18 nA Sleep, 200 µA/MHz Run • Enabling Integrity of Data without Sacrificing Power Consumption • Connection to USB or Wireless Protocols • Integrated USB 2.0 Device, Host, OTG • Easy Connection to Certified Modules for Wi-Fi®, ZigBee®, Sub-GHz, Bluetooth® LE

  28. Integrated Crypto Engine • Hardware Crypto Engine • Industry Standards for AES, DES, 3DES • Encryption & Decryption & Authentication • Secure Data Transfer & Storage • Random Number Generator • Supporting True-Random and Pseudo-Random Numbers • Reach a Higher Level of Data Security • Reduces Possibility for Hacking • Secure Key Storage for Additional Protection • 512 bits OTP Key Storage • Once Written, Keys cannot be Read or Overwritten by Software • Stores up to 4 AES Keys or 8 DES Keys • Advantage of a Hardware Crypto over Software Implementation • Less Software Overhead Frees Up CPU Bandwidth & Memory • Operate at a Lower CPU Frequency to Save Power • Another Example of Microchip’s Core Independent Peripherals

  29. PIC24 “GB2” Block Diagram

  30. Application Example:Remote Electronic Door Lock • Encryption for Security • Uses Crypto, RNG & Key Storage • User data is encrypted • Secure key storage • eXtreme Low Power • Low power extends battery life • Vbat with RTCC for battery backup • Access Options • Enter code manually via keypad • Magnetic keycard • Wirelessly via Smartphone Bluetooth® LE RN4020 Near Field Communication (NFC) PIC24FJ128GB204 Magnetic Card MCU Core UART Hardware encryption/Secure Key storage Digital I/O Display Unit Vbat 128KB Flash Key pad control (touch) Power CTMU Interrupt Motor Control Unit Door Latch

  31. PIC24F “GB2” MCU FamilyLow Power with Crypto Engine • Embedded Applications in the Internet-Connected World Demand Secure Data & Long Battery Life • PIC24F “GB2” for Secure Data Transfer & Storage • Hardware Crypto Engine • Random Number Generator & Secure Key Storage • PIC24F “GB2” for eXtreme Low Power • Longer battery life for portable applications • PIC24F “GB2” for Easy Connection • Integrated USB • Easy interface to certified Wi-Fi® or Bluetooth® LE modules

  32. Summary

  33. IoT Sensor NodesApplication Requirements • Low Power for Longest Possible Battery Life • Integrated Analog for Sensor Interface • Flexible Wireless Connection • Secure Data Transfer & Storage Note: The Microchip name and logo, and PIC are registered trademarks of Microchip Technology Inc. in the U.S.A. and other countries. MiWi is a trademark of Microchip Technology Inc. in the U.S.A. and other countries. All other trademarks mentioned herein are property of their respective companies.

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