Wireless Solutions. IEEE compliant low power RF devices. Ingolf Leidert. Atmel MCU Wireless Copyright Atmel Corporation

Transcription

1 Wireless Solutions IEEE compliant low power RF devices Ingolf Leidert Atmel MCU Wireless Copyright Atmel Corporation

2 Agenda Short Product Overview & History Wireless Network Technologies for the Internet of Things Device Features & Portfolio Overview Available Wireless Network Stacks Resources and Support Copyright Atmel Corporation

3 Atmel Product Overview Microcontrollers High performance Low power consumption High code density RF Microcontrollers High performance Low power consumption High code density Turnkey RF interface High level of integration RF Transceivers Turnkey RF interface High performance Low power consumption High level of integration Firmware Lightweight Mesh IEEE MAC 6LoWPAN Certified ZigBee Pro ZigBee Public Profiles, i.e. ZigBee Light Link Copyright Atmel Corporation

4 Our History in the wireless market Copyright Atmel Corporation

5 Wireless networks the last mile of the IoT Copyright Atmel Corporation

6 Range (meters) Wireless network standards ZigBee 6LoWPAN Proprietary ISM Bluetooth WiFi b/g Data Rate (Mbps) Copyright Atmel Corporation

7 Technology / No. of devices The internet evolution towards IoT 100B Wireless Sensor networks + light control + smart meters + shelf tags + access control + occupancy sensors + asset tracking B IPv4 100M 10k Wireless Internet /PAN + Laptop computers + tablets + smartphones + wireless accessories Wired Internet / LAN + company servers + home computers ARPANET (Universities) Copyright Atmel Corporation

8 Requirements for wireless sensor networks Benefits of IEEE based networks Basic parameters Low power operation Active current consumption < 15mA Sleep current consumption ~1uA Adressing scheme to enable large networks Over devices addressable per network Robust RF communication Sensitivity < -100dBm Robust O-QPSK modulation with 250kbps Data security AES128 ( CCM*, ECC ) HW enhancements the IoT will highly benefit from Multiple Adress Filters Enables devices to operate in multiple networks Interference detection HW support for RF distance measurements Identify location of devices within the network Copyright Atmel Corporation

9 Challenges for the last mile of the IoT Maintain low power concepts to enable long lifetime of wireless sensors Ensure secured data transmissions Efficient use of available frequency bands (band flexibility) Implement robust and secure Over the air update concepts Large networks will demand location information about single devices Real-time location applications Device maintenance Copyright Atmel Corporation

10 MCU Wireless SoC s and transceivers Copyright Atmel Corporation

11 Creating the Wireless AVR ATmegaRF family Combining the Best of Two Worlds Copyright Atmel Corporation

12 Introducing ATmegaRFR2 Ultra-low Power 2.4GHz Single-Chip Family Excellent RF Performance Ultra-Low Power Consumption Operation from 1.8V to 3.6V RX Override PSD Mask Shaping Antenna Diversity AES 128-bit Hardware Encryption External RF Front-end Control Hight Temp version ( C) ATmega256RFR2 Max RX Sens (dbm) -100 TX PWR (dbm) -17 to +3.5 Link Budget (db) Vcc Range (V) 1.8 to 3.6 Package QFN 48/64 Sleep Current (µa) 0.25 Listen Current (ma) 6.0 Receive Current (ma) 12.5 Transmit Current (ma) 14.5 RX Override PSD Mask Shaping Antenna Diversity AES Encryption Ext PA Support Temp (C) Yes Yes Yes Yes Yes and Copyright Atmel Corporation

13 Introducing ATmegaRFR2 Cont d AVR Microcontroller and 2.4GHz RF Transceiver Memories 64KB/128KB/256KB Flash 2KB/4KB/8KB EEPROM 8KB/16KB/32KB SRAM Interfaces: JTAG; SPI; TWI Timer: 2x8-bit timer 4x16 bit timer 1x32 bit symbol counter 10 bit SAR ADC Internal temperature sensor Pin compatible to ATmega128RFA Copyright Atmel Corporation

14 Excellent RF performance 2 mw +3.5 dbm TX Power +3.5 dbm 1 mw 0 dbm 103.5dB RX Sensitivity dbm Link Budget db -100 dbm Graphical Depiction of the Link Budget for ATmega256RFR2 Link Budget for ATmega256RFR Copyright Atmel Corporation

15 I_EVDD [ma] Ultra-Low Power Consumption MCU Current Consumption Deep Sleep: I<2.15uA TRX sleep MCU power save 32KHz XTAL, symbol counter running MCU Active 0.26mA/MHz (XTAL) (typical frequency) external CLK; AVR Active; Current consumption ext. CLK [MHz] Copyright Atmel Corporation

16 Reduced Power Consumption - RPC Smart Receiving Technology Reduces RX current consumption by more than 50% PLL Idle States PLL in idle state before receive, transmit and in backoff periods PLL idle state currrent consumption: I DD 0.45 ma Listening Mode Gated access to channel during RX listen periods RX sensitivity at -100 dbm with I DD 6 ma RX reduced sensitivity with I DD 5 ma Copyright Atmel Corporation

17 Current [ma] RPC RX_AACK Receive with Automatic Acknowledgement 16 RX Listen Frame Receive RX/TX ACK RX_SAFE Mode Averaged RX current 4 AT86RF231 AT86RF Time [ms] Copyright Atmel Corporation

18 Current [ma] RPC TX_ARET Transmit with Automatic Retry 16 Init Backoff Period CCA Frame Transmission ACK Receive AT86RF231 AT86RF Time [ms] Copyright Atmel Corporation

19 Power RX Override More Efficient Use of the Frequency Bands Present Situation RX syncs to any 15.4 frame and starts complete PSDU decoding Disturbances during frame period are not considered Adressing is not considered Weakness RX may be busy with destroyed or unwanted frames Improvement Stop frame reception, reset receiver and restart search Restart Criteria Increase of ED level during frame reception IPAN does not match LQI value degradation during PSDU reception Summary RXO detects interference scenarios and performs fast RX restart RXO Time Interferer frame rx listen Copyright Atmel Corporation

20 PSD Mask [dbr] TX Pout PSD Mask Shaping Enables Full TX Power (1W) on CH25 and CH26... Improve Two Parameters Channels Enable up to 30 dbm off-chip power amplifier Increase on-chip TX output power Smoothing PSD for out-of-band spectrum for use of external PA Increase output power mw 1 mw +3.5 dbm 0 dbm >18 db 103.5dB Frequency [MHz] -100 dbm Copyright Atmel Corporation

21 TX Pout PSD Mask Shaping Cont d Channels Demand: provide nearly equal high TX pout for all channels Configurable TX pulse-shaping optimizes out-of band spurs Summary: Ch11..25: P max =30dBm, Ch26: P max = dBm Plot Details Blue: no shaping Black: TX pulse-shaping Improvement >14 db Conclusion PSD mask not shaped Pmax_Ch26 13 dbm Improved PSD mask Pmax_Ch26 27 dbm Copyright Atmel Corporation

22 Antenna Diversity Automatic Selection of Antenna with Stronger Signal No Firmware Interaction Required Automatic Control of External RF Front-end Copyright Atmel Corporation

23 AES 128-bit Encryption Engine AES Crypto for High-speed Encrypted Communication Offload CPU and reduce power consumption Hardware Encryption Engine 128-bit key length Encryption of 16 bytes in 24 µs Decryption of 16 bytes in 24 µs ECB modes CBC modes Authorized for Export to All Countries ECCN 5A992a Copyright Atmel Corporation

24 Atmel Device Overview - Transceivers 20 kbps 4 ISM Bands Device ISM Band (GHz/MHz) Max Bit Rate (Kbps/Mbps ) Max RX Sens (dbm) TX PWR (dbm) Link Budget (db) Vcc Range (V) Package AT86RF GHz 250kbps to to 3.6 QFN32 AT86RF GHz 2Mbps to to 3.6 QFN32 AT86RF GHz 250kbps to to 3.6 QFN32 AT86RF GHz 2Mbps to to 3.6 QFN32 AT86RF212 AT86RF212B 700MHz 800MHz 900MHz 700MHz 800MHz 900MHz 1Mbps to to 3.6 QFN32 1Mbps to to 3.6 QFN Copyright Atmel Corporation

25 Atmel Device Overview Transceivers - Cont d 20 kbps 4 ISM Bands Device Sleep Current (ua) Receive Current (ma) Transmit Current (ma) Antenna Diversity AES Encryption Ext PA Support Temp AT86RF No No No AT86RF Yes Yes Yes AT86RF Yes Yes No AT86RF Yes Yes Yes AT86RF @5dBm Yes Yes Yes AT86RF212B @5dBm Yes Yes Yes Copyright Atmel Corporation

26 Atmel Wireless MCUs Device ISM Band (GHz/MHz) Max Bit Rate (Kbps/Mbps) Max RX Sens (dbm) TX PWR (dbm) Link Budget (db) Vcc Range (V) Package ATmega128RFA1 2.4GHz 2 Mbps to to 3.6 QFN64 ATmegaxxxRFR2 2.4GHz 2 Mbps to to 3.6 QFN64 Atmegaxxx(4)RFR2 2.4GHz 2 Mbps to to 3.6 QFN Copyright Atmel Corporation

27 Atmel Wireless MCUs - Cont d Device Sleep Current (ua) Receive Current (ma) Transmit Current (ma) Antenna Diversity AES Encryption Ext PA Support Temp ATmega128RFA Yes Yes Yes ATmegaxxxRFR / Yes Yes Yes ATmegaxxx4RFR / Yes Yes Yes Copyright Atmel Corporation

28 Copyright Atmel Corporation MCU Wireless software stacks

29 Wireless stacks available LWMesh IEEE MAC 6LoWPAN ZigBee stack family Copyright Atmel Corporation

30 Atmel Lightweight Mesh Software Content and purpose Proprietary wireless mesh networking stack Example applications Rapid prototyping Easy development Application examples WSN Demo Energy detection Template Over the air upgrade Bootloader Download from: Copyright Atmel Corporation

31 Footprint Atmel MCU Wireless Software Library Content and purpose Low level drivers & Example applications Rapid prototyping Easy development Application examples Performance test application Peer-to-peer applications Star Network Basic sensor network High data rate star network Secure remote control App App Stack App MAC MAC HAL HAL HAL Functionality Download from: AVR2025 IEEE MAC Included in ASF Copyright Atmel Corporation

32 6LoWPAN Protocol characteristics IPv6 over Low-Power wireless Area Networks Defined by IETF standards Base: RFC 4919, 4944, 6282 Neighbor Discovery: RFC 6775 RPL Routing: RFC 6550 Stateless header compression 6-7 byte overhead including UDP Enables a standard socket API Minimal use of code and memory Direct end-to-end Internet integration Multiple topology options Copyright Atmel Corporation

33 ZigBee RF4CE Designed to Replace Infra-red Industry/Consumer-driven market Enhanced user experience 2-way communication No line of sight requirements More reliable Atmel offers a complete solution Touch/RF Support Microcontrollers Transceivers/System on Chips Reference Designs Certified ZigBee RF4CE Stack and Remote Control Profile Download from: Copyright Atmel Corporation

34 ZigBee Protocol characteristics Low power Up to 15 years on single battery Low cost 8-bit MCUs IEEE transceivers Reliable and robust Self-healing Full mesh routing Over the Air updates Secure Built-in encryption (AES128) Authentication Interoperable Multi-vendor networks Certified end products based on application profiles Copyright Atmel Corporation

35 ZigBee PRO and Public Profiles Designed for Sensor and Control Applications Description Low-power and sleeping devices Large-scale networks Mesh network reliability and security Atmel Offers a Complete Solution Touch/RF support Microcontrollers Transceivers/SoC Reference designs Certified ZigBee PRO Stack and Public Profiles ZigBee Smart Energy ZigBee Building Automation ZigBee Home Automation ZigBee Light Link Download from: & Copyright Atmel Corporation

36 Atmel BitCloud ZigBee PRO Copyright Atmel Corporation

37 ZigBee Family Light Link Atmel provides reference implementation Application Profiles Smart Energy 1.x... Building Automation Home Automation Atmel solution has ZigBee Golden Unit status 3rd party SW vendors provide solutions on Atmel HW Input Device Remote Control OEM Manufacturer Specific Smart Energy 2.0 Network Platform ZigBee RF4CE Green Power ZigBee PRO ZigBee IP Network and Transport layers RF Platform Physical and Data Link layers Copyright Atmel Corporation

38 Additional Resources and Support Datasheets, Application Notes and Design Software Community Website AVR Wireless Forum Norway Sales Portal Atmel Academy Training Portal Technical Support Center AVR Hotline Copyright Atmel Corporation

39 2012 Atmel Corporation. All rights reserved. Atmel, Atmel logo and combinations thereof, Enabling Unlimited Possibilities, and others are registered trademarks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN THE ATMEL TERMS AND CONDITIONS OF SALES LOCATED ON THE ATMEL WEBSITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS AND PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and products descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life Copyright Atmel Corporation