Microchip ATA8515 Manual de Usario

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AN3857
Social Distancing with UHF and UWB Devices Application
Note
Introduction
This application note describes a Social Distancing (SD) application to measure and track distances between SD
devices (up to five) using Microchip's UHF and UWB technologies. These technologies offer low-power solutions for
longer battery life. The purpose of this application is to raise an alarm if the distance falls below a threshold value for
a predefined time.
Features
ATA8510 UHF Transceiver for Communication to Other Devices at 433 MHz or 868 MHz
ATA8350 Ultra-Wide-Band (UWB) Transceiver for Distance Measurement at 7 GHz
AIS2DW12 Motion Sensor for Movement Detection
ATtiny3217 Host MCU for Application Control
Supports Tracking Up to Four Other Devices within 3m x 3m Area
Generates an Alarm by LED Flashing and Buzzer when the Distance Between Two Devices is Less than 1.5m
or 2m for More than 5 Seconds
Optional Saving of Contact IDs in Serial Flash Device (SST25PF040C)
Operates with a LIR2540 or CR2540 Coin Cell Battery for More than a Week
Optional USB Li-Ion Charger (MIC79110) for Li-Ion or Li-Po Accumulator with 3V Regulator (MIC5306) instead
of Coin Cell
MICROCHIP CONFIDENTIAL
FOR RELEASE ONLY UNDER NON-DISCLOSURE
AGREEMENT (NDA)
© 2021 Microchip Technology Inc. Application Note DS00003857A-page 1
Table of Contents
Introduction.....................................................................................................................................................1
Features......................................................................................................................................................... 1
1. Quick References....................................................................................................................................3
1.1. Reference Documentation............................................................................................................3
1.2. Hardware Prerequisites................................................................................................................3
1.3. Acronyms/Abbreviations...............................................................................................................3
2. Overview................................................................................................................................................. 4
2.1. General Flow................................................................................................................................5
2.2. Application Flow........................................................................................................................... 5
3. Social Distancing States......................................................................................................................... 7
3.1. Unconnected State.......................................................................................................................7
3.2. Connected State...........................................................................................................................9
3.3. Search State...............................................................................................................................11
3.4. Alarm State.................................................................................................................................12
4. RF Parameters......................................................................................................................................13
5. Prototype and Demo Kit for Social Distancing ..................................................................................... 14
6. Prototype Implementation..................................................................................................................... 15
6.1. Data Processing.........................................................................................................................15
6.2. UHF Polling Configuration .........................................................................................................15
6.3. Fast ADV_RX Mode...................................................................................................................15
6.4. Status Output ............................................................................................................................ 15
6.5. Exception Handling and Debug Output...................................................................................... 16
7. Prototype Measurement Example.........................................................................................................17
8. Document Revision History...................................................................................................................19
The Microchip Website.................................................................................................................................20
Product Change Notification Service............................................................................................................20
Customer Support........................................................................................................................................ 20
Microchip Devices Code Protection Feature................................................................................................ 20
Legal Notice................................................................................................................................................. 21
Trademarks.................................................................................................................................................. 21
Quality Management System....................................................................................................................... 22
Worldwide Sales and Service.......................................................................................................................23
AN3857
© 2021 Microchip Technology Inc. Application Note DS00003857A-page 2
Microchip Confidential: For Release Only Under Non-Disclosure Agreement (NDA)
1. Quick References
1.1 Reference Documentation
For further details, refer to the following:
ATA8510/ATA8515 UHF ASK/FSK Transceiver Datasheet ( )9315G
ATA8350 UWB Transceiver Datasheet (DS70005395)
ATtiny3216/3217 tinyAVR® 1-series Datasheet ( )DS40002205
AIS2DW12 Datasheet
MIC2203 Buck Regulator Datasheet
MIC5306 Linear Regulator Datasheet
MIC79110 Linear Li-Ion Charger Datasheet
SST25PF040C Serial Flash Datasheet
1.2 Hardware Prerequisites
ATA8510 UHF transceiver for the communication between SD devices
ATA8350 UWB transceiver for distance measurement between two connected SD devices
AIS2DW12 motion sensor for movement detection
ATtiny3217 host MCU for application control
MIC2203, MIC5306 power regulators
MIC79110 Li-Ion USB charger device
SST25PF040C serial Flash for ID data storing
1.3 Acronyms/Abbreviations
Table 1-1. Acronyms/Abbreviations
Acronyms/Abbreviations Description
LED Light Emission Diode
PR Prover
MCU Microcontroller Unit
PCB Printed Circuit Board
SD Social Distancing
ToF Time-of-Flight
TRPA Transparent Raw Data Output Path A
UHF Ultra High Frequency
VR Verifier
UWB Ultra-wideband
AN3857
Quick References
© 2021 Microchip Technology Inc. Application Note DS00003857A-page 3
Microchip Confidential: For Release Only Under Non-Disclosure Agreement (NDA)

Especificaciones del producto

Marca: Microchip
Categoría: No categorizado
Modelo: ATA8515

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