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Low-Power Embedded Solutions for IoT Sensor Nodes By Alexis Alcott Sr

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1 Low-Power Embedded Solutions for IoT Sensor Nodes By Alexis Alcott Sr
Low-Power Embedded Solutions for IoT Sensor Nodes By Alexis Alcott Sr. Product Marketing Manager, MCU16 Division Microchip Technology Inc.

2 Internet-Enabled Applications
IoT Sensor Node

3 IoT Sensor Nodes Application 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 Power Mode Clock Speed Program Flow
MCU Run Power – 3 Factors Power Mode Clock Speed Program Flow

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 off Reset, peripherals off Low V Regulator Enabled, 90% Savings Core off, RAM on Most peripherals off

7 256 Hz to 32 MHz, under software control!
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 Peripheral Run Mode Idle Mode % Saved(3) ADC 520 µA 250 µA 52% Comparator 340 µA 70 µA 79% SPI Timers 320 µA 50 µA 84%

9 Battery-Life Estimation Without Power Modes
No Power modes Battery life 47 days Annoying! Avg. Current 2.5 mA

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 Estimation 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 12-bit ADC 10-bit DACs
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 Microchip Focus: Wireless Connectivity of Things
Home health and Medical Smart Power/Energy Industrial Control and Monitoring Home Control and Monitoring 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 19

20 How to Connect? Your Application!

21 Embedded Wireless Portfolio
Technology Protocol Markets Market Driver Network Stack Freq. Embedded Wi-Fi® IEEE Widespread Commercial Industrial Internet TCP/IP 2.4 GHz Embedded Bluetooth® IEEE Smartphone BT v2.1, BT Audio, BTLE Embedded Wireless Proprietary or IEEE Vertical HA, SEP, Sensors Cost Local Network MiWi™, BT, ZigBee®, RF4CE, Sub 1 GHz & 2.4 GHz

22 Microchip’s Bluetooth® Portfolio
16XX: Class Title Microchip’s Bluetooth® Portfolio RN41 / 41N RN42 / RN42N RN52 RN4020 Type Class 1 Bluetooth® 2.1 Class 2 Bluetooth 2.1 Bluetooth 3.0 Bluetooth LE Interfaces UART / USB Analog spk and mic, i2S, SPDIF, PCM, UART UART Profiles SPP / HID / iAP / HCI A2DP / ARVCP / HSP / HFP / SPP / iAP GATT, Health, Fitness, Proximity, etc.; Custom data Power 3.3 VDC Antenna ceramic on board PCB Size 13.4 x 25.8 x 2.0 13.4 x 30 x 3.0 11.5 x 19.5 x2.0 Certification BT SIG / FCC / CE / ICS

23 Microchip’s Wi-Fi® Modules
MRF24WB0MA MRF24WB0MB MRF24WG0MA MRF24WG0MB RN171 RN131C/G Radio b b/g Tx Power +10 dBm +18 dBm +12 dBm Power Consumption 250 µA power save 85 mA Rx 150 max Tx 4 mA power save 95 mA Rx 240 max Tx 4 µA sleep 35 mA Rx 185 max Tx 40 mA Rx 200 max Tx Antenna u.FL / PCB u.FL/PCB RF pad Chip/u.FL Stack On PIC® MCU On PIC MCU Integrated MCU Support 8/16/32 bit PIC MCUs Any 8/16/32 bit Certifications FCC/IC/EN Wi-Fi® Alliance Wi-Fi Alliance KC/NCC KC/NCC/Telec 23 23

24 Microchip’s ZigBee® & MiWi™
IEEE 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 UART MCU Core Hardware encryption/Secure Key storage Digital I/O Display Unit Vbat 128KB Flash Key pad control (touch) Power CTMU Interrupt Door Latch Motor Control Unit

31 PIC24F “GB2” MCU Family Low 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 Nodes Application 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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