Microchip Technology RE46C420 User Manual
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Microchip Technology RE46C420 User Manual

Microchip Technology RE46C420 User Manual

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RE46C420
Demonstration Board
User's Guide
 2021 Microchip Technology Inc. and its subsidiaries
DS50003186A

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Summary of Contents for Microchip Technology RE46C420

  • Page 1 RE46C420 Demonstration Board User’s Guide  2021 Microchip Technology Inc. and its subsidiaries DS50003186A...
  • Page 2 Microchip Technology Inc. in other countries. stated. GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries. All other trademarks mentioned herein are property of their respective companies.

  • Page 3: Table Of Contents

    2.2 Getting Started ..................... 11 2.2.1 Additional Tools Required for Operation ........... 11 2.2.2 First Steps ....................11 2.2.3 Proper Connection of the RE46C420 Demonstration Board ..... 12 2.3 GUI Setup Procedure ................... 13 2.3.1 Introduction and Communications Tabs ............ 13 2.3.2 Control Tab ....................
  • Page 4 RE46C420 Demonstration Board User’s Guide NOTES:  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 4...

  • Page 5: Preface

    Customer Support • Document Revision History DOCUMENT LAYOUT This document describes how to use the RE46C420 Demonstration Board as a development tool to emulate and debug firmware on a target board. The manual layout is as follows: • Chapter 1. “Product Overview”...
  • Page 6 Choice of mutually exclusive errorlevel {0|1} character: { | } arguments; an OR selection Ellipses... Replaces repeated text var_name [, var_name...] Represents code supplied by void main (void) user { ...  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 6...
  • Page 7 Preface RECOMMENDED READING This user’s guide describes how to use the RE46C420 Demonstration Board. Other useful documents are listed below. The following Microchip document is available and recommended as a supplemental reference resource: RE46C420 Data Sheet – “Low-Voltage Multicriteria Smoke Detector Companion IC with Dual Photoelectric and CO Sensing”...
  • Page 8 RE46C420 Demonstration Board User’s Guide NOTES:  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 8...

  • Page 9: Chapter 1. Product Overview

    The RE46C420 device allows the microcontroller unit to command all the parameters that set the output voltage signal levels of the RE46C420, such as the LED current, amplifier gain and integration time. All of these parameters, including the enabling of various functions, can be set via the SPI port.

  • Page 10: What Is The Re46C420 Demonstration Board

    RE46C420 Companion IC. The RE46C420 Demonstration Board allows the user to access all the features of the RE46C420 device with the aid of a Graphical User Interface (GUI). All IC pins are brought out to test points for easy monitoring.

  • Page 11: Chapter 2. Installation And Operation

    2. Connect the RE46C420 Demonstration Board to the batteries or attach a 3V power supply to the V test point. 3. Use the USB cable to connect the RE46C420 Demonstration Board to the PC through the J8 port (Figure 2-1).

  • Page 12: Proper Connection Of The Re46C420 Demonstration Board

    • J8: USB port used for UART communication with the PC. • J9: Connector for the AC/DC wall adapter. The RE46C420 Demonstration Board is designed to operate with a 3V battery configuration, but requires the J9 power to be supplied for the PC GUI operation.

  • Page 13: Gui Setup Procedure

    PC and the RE46C420 Demonstration Board. FIGURE 2-2: RE46C420 GUI – Introduction Tab. 3. Use the PC device manager to determine the correct port for the RE46C420 Demonstration Board. 4. Next, select the proper port through the Comm Ports drop-down menu in the...

  • Page 14: Control Tab

    2.3.2 Control Tab Select the Control tab (Figure 2-4) to start setting up the registers for the RE46C420 device. FIGURE 2-4: RE46C420 GUI – Control Tab. The Control tab allows the configuration of registers, as outlined in the data sheet. The registers are predominately used for controlling the individual functional blocks of the RE46C420.

  • Page 15: Setup Tab

    2.3.3 Setup Tab Select the Setup tab (Figure 2-5) to start configuring the registers of the RE46C420 device. FIGURE 2-5: RE46C420 GUI – Setup Tab. The Setup tab allows the configuration of the setup registers as outlined in the data sheet.

  • Page 16: Functional Tab

    RE46C420 Demonstration Board User’s Guide 2.3.4 Functional Tab Select the Functional tab (Figure 2-6) to explore the options for functional testing of the RE46C420 device. FIGURE 2-6: RE46C420 GUI – Functional Tab.  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 16...
  • Page 17 Click the Write All button to enable all of the existing drop-down selections in the Control and Setup tabs to be programmed to the RE46C420. b) Click the Read All button to allow all the existing register data to be displayed in the Register Data text boxes.

  • Page 18: Operating The Re46C420 Demonstration Board

    FIGURE 2-7: RE46C420 Demonstration Board – Chamber LED. The RE46C420 Demonstration Board comes supplied with a single photodiode receiver with a dual emitter. Photo Diode 1 (PD1) has an infrared LED and a blue LED. Each LED has its own LED driver. The user can select the LED currents in the GUI and can measure them in-line by placing an ammeter across the jumpers J2 (LED1) or J3 (LED2).
  • Page 19 2-11), the integrated voltage is 0.360V, which yields a photodiode current of 2.25 nA. For Plot 4 (Figure 2-11), the integrated voltage is 0.720V, which yields a photodiode current of 2.25 nA.  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 19...
  • Page 20 2-9, with the gain setting increased to eight and all other settings unchanged. FIGURE 2-10: Plot 2, PD1 Blue LED: Gain = 8, Int. Time = 200 µs, LED Current = 100 mA.  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 20...
  • Page 21 Plot 3, PD1 IR LED: Gain = 4, Int. Time = 200 µs, LED Current = 100 mA. FIGURE 2-12: Plot 4, PD1 IR LED: Gain = 8, Int. Time = 200 µs, LED Current = 100 mA.  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 21...

  • Page 22: Performing A Photo Loop Test Operation

    4. During the initial setup, click both the PA1 Setting and PA2 Setting buttons for the board to write the settings to the RE46C420. Then click the Integrate 2 button to execute a single integration sequence.

  • Page 23: Additional Features

    Go to the Chart tab of the GUI (Figure 2-14) to observe a real-time reporting of the IR and Blue LEDs outputs, as well as the CO readings. FIGURE 2-14: RE46C420 GUI – Chart Tab.  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 23...

  • Page 24: Piezoelectric Horn

    FIGURE 2-15: Horn Start-up. FIGURE 2-16: Horn Operation: Channel 1 (Blue) = HS Pin, Channel 2 (Violet) = HB Pin, Channel 3 (Yellow) = FEED Pin.  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 24...

  • Page 25: I/O Function

    CO interconnect signal at the IO pin. FIGURE 2-17: CO Interconnect Signal at IO – Unloaded. FIGURE 2-18: CO Interconnect Signal at IO – Loaded with 200 µF || 1.86 kΩ.  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 25...

  • Page 26: Co Test Feature

    CO Operation: Channel 1 – Anti-Polarization Control Signal, Channel 2 – CO Out (Clean Air, CO Test Feature Exercised Mid-Way). FIGURE 2-20: CO Operation: CO Applied, Approximatively 10s Into Test.  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 26...

  • Page 27: Appendix A. Schematic And Layouts

    RE46C420 DEMONSTRATION BOARD USER’S GUIDE Appendix A. Schematic and Layouts INTRODUCTION This appendix contains the following schematics and layouts for the RE46C420 Demonstration Board: • Schematic 1 • Schematic 2 • Schematic 3 • Top Silk • Top Copper and Silk •...

  • Page 28: Schematic 1

    To monitor current 3.3k 0.1 μF BATT + VBST 1 μF 10 μF ABUF 10 μH VREG 0.065R RLED 330R VREG VREG TP10 RE46C420 TP11 TP12 IOtr ABUF IOtr TP13 TP14 ENABLE IRCAP TP15 IOtr IRCAP 1000 pF IOFOUT BYS10-25 10 μF...
  • Page 29 SCHEMATIC 2 MODULAR RJ25 1 2 3 4 5 6 ICSPCLK ICSPDAT BATTERY MstrclrB /MCLR/RE3 ABUF TmpOut TP21 TP22 TP23 0.1 μF VREG CLKOUT 10 pF TP24 IOFout 32.768 kHz COpolarization TP26 ENABLE TP27 LED_GRN TP28 Allow external Enable 10 pF ICSPCLK ICSPDAT PIC16LF18855...

  • Page 30: Schematic 2

    RE46C420 Demonstration Board User’s Guide SCHEMATIC 3 TP29 TP30 V10.0 V5.0 POWER 2.5 mm 10000 pF 10 μF 0.22 μF 10000 pF 0.1 μF 10 μF MIC39100-5.0WS  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 30...

  • Page 31: Top Silk

    Schematic and Layouts TOP SILK TOP COPPER AND SILK  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 31...

  • Page 32: Top Copper

    RE46C420 Demonstration Board User’s Guide TOP COPPER BOTTOM COPPER  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 32...

  • Page 33: Bottom Copper And Silk

    Schematic and Layouts BOTTOM COPPER AND SILK A.10 BOTTOM SILK  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 33...
  • Page 34 RE46C420 Demonstration Board User’s Guide NOTES:  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 34...

  • Page 35: Appendix B. Bill Of Materials (Bom)

    RE46C420 DEMONSTRATION BOARD USER’S GUIDE Appendix B. Bill of Materials (BOM) TABLE B-1: RE46C420 DEMONSTRATION BOARD – BILL OF MATERIALS (BOM) Qty. Reference Description Manufacturer Part Number BUZ1 Mechanical, HW, Buzzer, Piezo, East Electronics EFM-290EDQ 9V, 90 dB, Through-Hole Corp.
  • Page 36 RE46C420 Demonstration Board User’s Guide TABLE B-1: RE46C420 DEMONSTRATION BOARD – BILL OF MATERIALS (BOM) (CONTINUED) Qty. Reference Description Manufacturer Part Number J5, J10 Connector, HDR-2.54, Male, 1x3, Amphenol ICC 68000-103HLF Gold, 5.84 MH, Through-Hole, (FCI) Vertical Connector, USB 2.0, Micro-B,...
  • Page 37 Bill of Materials (BOM) TABLE B-1: RE46C420 DEMONSTRATION BOARD – BILL OF MATERIALS (BOM) (CONTINUED) Qty. Reference Description Manufacturer Part Number TP1, TP2, TP3, Connector, Test Point, Pin, Tin, Harwin Plc. H2121-01 TP4, TP5, TP6, Through-Hole TP7, TP8, TP9, TP10, TP11, TP12,...

  • Page 38: Worldwide Sales And Service

    Tel: 46-31-704-60-40 Tel: 631-435-6000 Sweden - Stockholm San Jose, CA Tel: 46-8-5090-4654 Tel: 408-735-9110 UK - Wokingham Tel: 408-436-4270 Tel: 44-118-921-5800 Canada - Toronto Fax: 44-118-921-5820 Tel: 905-695-1980 Fax: 905-695-2078  2021 Microchip Technology Inc. and its subsidiaries DS50003186A-page 38 09/14/21...

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