RE46C190 Demo Board User’s Guide © 2011 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
RE46C190 DEMO BOARD USER’S GUIDE Table of Contents Preface ........................................................................................................................... 5 Introduction............................................................................................................ 5 Document Layout .................................................................................................. 5 Conventions Used in this Guide ........................................................
RE46C190 Demo Board User’s Guide DS51970A-page 4 © 2011 Microchip Technology Inc.
RE46C190 DEMO BOARD USER’S GUIDE Preface NOTICE TO CUSTOMERS All documentation becomes dated, and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions may differ from those in this document. Please refer to our web site (www.microchip.com) to obtain the latest documentation available. Documents are identified with a “DS” number.
RE46C190 Demo Board User’s Guide CONVENTIONS USED IN THIS GUIDE This manual uses the following documentation conventions: DOCUMENTATION CONVENTIONS Description Arial font: Italic characters Initial caps Quotes Underlined, italic text with right angle bracket Bold characters N‘Rnnnn Text in angle brackets < > Courier New font: Plain Courier New Represents Referenced books Emphasized text A window A dialog A menu selection A field name in a window or dialog A menu path MPLAB® IDE User’s Guide ...
Preface RECOMMENDED READING This user's guide describes how to use the RE46C190 Demo Board. Other useful documents are listed below. The following Microchip documents are available and recommended as supplemental reference resources. • RE46C190 Data Sheet - “CMOS Low Voltage Photoelectric Smoke Detector ASIC with Interconnect and Timer Mode”, DS22271. THE MICROCHIP WEB SITE Microchip provides online support via our web site at www.microchip.com.
RE46C190 Demo Board User’s Guide DOCUMENT REVISION HISTORY Revision A (April 2011) • Initial Release of this Document. DS51970A-page 8 © 2011 Microchip Technology Inc.
RE46C190 DEMO BOARD USER’S GUIDE Chapter 1. Product Overview 1.1 INTRODUCTION The RE46C190 is a low voltage, programmable photo smoke detector with interconnect, local alarm indication, programmable setup, programmable calibration, programmable feature selection, boost regulator and horn driver. This device has a minimal external component count.
RE46C190 Demo Board User’s Guide The demo board is designed for battery operation using a CR123A battery, or can be operated using a power supply. The RE46C190 application circuit is on the right side of the board by the battery holder and piezo horn, while the smoke chamber emulator is on the left side. The emulator can be disconnected from the application circuit and a photo smoke chamber or its components can be connected to the demo board. 1.
RE46C190 DEMO BOARD USER’S GUIDE Chapter 2. Installation and Operation 2.1 INTRODUCTION The RE46C190 Demo Board allows full evaluation of the RE46C190 functionality, including programmability. The demo board consists of two parts: • RE46C190 application circuit (see Figure 2-1) • A smoke-chamber emulation circuit (see Figure 2.2).
RE46C190 Demo Board User’s Guide 2.2 SETUP Before powering the RE46C190 Demo Board, complete the following steps: 1. Place the potentiometer knob on the 2M POT. 2. Attach the six standoffs with screws are provided to act as legs for the demo board. 3. Start with the switch in OFF state, toggled toward the label R8, and ensure that Rv2 is turned fully clockwise, to its highest resistance value.
Installation and Operation Another basic test is the low battery test. Connect a digital multimeter to the test pins VDD and GND, to monitor the VDD. Toggle the switch SW2 toward the center of the demo board and observe the change in VDD. Turn Rv2 counterclockwise to lower the VDD voltage to less than 2.4V, where the low battery threshold should be set. The piezo horn chirps once every 43 seconds. The low battery Silence mode can be entered by pressing SW1.
RE46C190 Demo Board User’s Guide TABLE 2-2: RE46C190 DEMO BOARD TEST POINTS Test Point VBAT The battery voltage or power supply voltage GND2 Second connection to VSS TEST Connection to Pin 4 of the RE46C190 device and the push-to-test button IRED Connection to the smoke chamber emulator and to Pin 2 of the RE46C190 device TEST2 GND VDD Connection to Pin 5 of the RE46C190 device Connection to VSS Connection to Pin 3 of the RE46C190 device GLEDR Connection to the green LED resistor and the green
RE46C190 DEMO BOARD USER’S GUIDE Appendix A. Schematic and Layouts A.1 INTRODUCTION This appendix contains the following schematics and layouts for the RE46C190 Demo Board. • A.2 “Board Schematic - RE46C190 Application Circuit and Smoke Chamber Regulator” • A.3 “Smoke Chamber Emulation Circuit” • A.4 “Board - Top Silk and Pads” • A.5 “Board - Top Trace and Pads” • A.6 “Board - Bottom Trace and Pads” © 2011 Microchip Technology Inc.
GND 3V D1 RED RLED R20 0 IRNc R19 0 IRPc RLEDR 330 R18 0 IREDc R17 0 IRCAPc GND2 D4 R1 R15 0 R2 IRED C3 GLEDR C4 SW2 SW1 2K POT R8 TEST2 TEST Rv2 100 100 μF 1 μF 100 10 μF C6 100 D2 R4 GREEN VBATc 10k DS51970A-page 16 HS VDD HB VBST IRED TEST LX VSS IC1 13 14 15 16 IRCAP RE46C190 5 TEST2 12 IO 11 6 IRP IRCAP 7 10 IRN FEED 8 9 RLED GLED 4 3 2 1 GND VDD GLED LX 10 μH L1 33 μF C5 R5 330 HB R3 1 nF C1 D3 1.
Schematic and Layouts A.3 SMOKE CHAMBER EMULATION CIRCUIT IRCAPc IREDc VBATc R24 10K R27 220K FDN302P R29 Q5 Q4 20M BS250P RA1 100M 10K RB1 XA IC3 VCC YA A_CTRL YB D_CTRL XD XB B_CTRL YD IRNc C_CTRL YC Rv3 2M POT R25 R26 10K Q6 ZVN4206A IRPc R23 R22 1M 20 0 ENABLE XC 20M RC1 GND VEE 4316 100M RD1 GND A.4 BOARD - TOP SILK AND PADS © 2011 Microchip Technology Inc.
RE46C190 Demo Board User’s Guide A.5 BOARD - TOP TRACE AND PADS A.6 BOARD - BOTTOM TRACE AND PADS DS51970A-page 18 © 2011 Microchip Technology Inc.
RE46C190 DEMO BOARD USER’S GUIDE Appendix B. Bill of Materials (BOM) TABLE B-1: Qty BILL OF MATERIALS (BOM) Reference Description Manufacturer Part Number 3 BH1 CR123A Battery Holder for PCB mount - http://www.batteryspace.com BCR123A RoHS Compliant (BCR123A) 1 C1 Multilayer Ceramic Capacitor (MLCC) 1206 100 volts 1000pF 10% X7R 1 C2 Multilayer Ceramic Capacitor (MLCC) - TDK® Corporation SMD/SMT 1210 4.
RE46C190 Demo Board User’s Guide TABLE B-1: Qty BILL OF MATERIALS (BOM) (CONTINUED) Reference Description Manufacturer Part Number 3 R2, R4, R8 Resistor 1206-SMD 1/4 watt 100 ohms 1% Vishay Intertechnology, Inc./Dale CRCW1206100RFKEA 1 R5 Resistors1206-SMD 1/4 watt 1.5 Meg ohms 1% Vishay Intertechnology, Inc./Dale CRCW12061M50FKEA 2 R6, R9 Resistors1206-SMD 1/4 watt 220K ohms 1% Vishay Intertechnology, Inc.
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