TC77 Thermal Sensor
PICtail™ Demo Board
User’s Guide
© 2006 Microchip Technology Inc.
DS51484B
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dsPIC, KEELOQ, microID, MPLAB, PIC, PICmicro, PICSTART,
PRO MATE, PowerSmart, rfPIC and SmartShunt are
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FanSense, FlexROM, fuzzyLAB, In-Circuit Serial
Programming, ICSP, ICEPIC, Linear Active Thermistor, Mindi,
MiWi, MPASM, MPLIB, MPLINK, PICkit, PICDEM,
PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo,
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DS51484B-page ii
© 2006 Microchip Technology Inc.
TC77 THERMAL SENSOR PICtail™
DEMO BOARD USER’S GUIDE
Table of Contents
Preface ........................................................................................................................... 1
Introduction............................................................................................................ 1
Document Layout .................................................................................................. 1
Conventions Used in this Guide ............................................................................ 2
Recommended Reading........................................................................................ 2
The Microchip Web Site ........................................................................................ 3
Customer Support ................................................................................................. 3
Document Revision History ................................................................................... 3
Chapter 1. Product Overview ....................................................................................... 5
1.1 Introduction ..................................................................................................... 5
1.2 What is the TC77 Thermal Sensor PICtail™ Demo Board? ........................... 5
1.3 What the TC77 Thermal Sensor PICtail™ Demo Board kit includes ............. 5
Chapter 2. Installation and Operation ......................................................................... 7
2.1 Introduction ..................................................................................................... 7
2.2 Features ......................................................................................................... 7
2.3 Getting Started ............................................................................................... 7
Appendix A. Schematic and Layouts ........................................................................ 13
A.1 Introduction .................................................................................................. 13
A.2 Board Schematic ........................................................................................ 14
A.3 Board - Top Layer ...................................................................................... 14
A.4 Board - Silk Screen Layer .......................................................................... 15
A.5 Board - Bottom Layer ................................................................................. 15
Appendix B. Bill Of Materials (BOM) ......................................................................... 17
Worldwide Sales and Service .................................................................................... 18
© 2006 Microchip Technology Inc.
DS51484B-page iii
TC77 Thermal Sensor PICtail™ Demo Board User’s Guide
NOTES:
DS51484B-page iv
© 2006 Microchip Technology Inc.
TC77 THERMAL SENSOR PICtail™
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. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the
document.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
TC77 Thermal Sensor PICtail™ Demo Board. Items discussed in this chapter include:
•
•
•
•
•
•
Document Layout
Conventions Used in this Guide
Recommended Reading
The Microchip Web Site
Customer Support
Document Revision History
DOCUMENT LAYOUT
This document describes how to use the TC77 Thermal Sensor PICtail™ Demo Board
as a development tool. The manual layout is as follows:
• Chapter 1. “Product Overview” – Important information about the TC77
Thermal Sensor PICtail™ Demo Board.
• Chapter 2. “Installation and Operation” – Includes instructions on how to get
started with the TC77 Thermal Sensor PICtail™ Demo Board.
• Appendix A. “Schematic and Layouts” – Shows the schematic and board layout diagrams for the TC77 Thermal Sensor PICtail™ Demo Board.
• Appendix B. “Bill Of Materials (BOM)” – Lists the parts used to build the TC77
Thermal Sensor PICtail™ Demo Board
© 2006 Microchip Technology Inc.
DS51484B-page 1
TC77 Thermal Sensor PICtail™ Demo Board User’s Guide
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description
Arial font:
Italic characters
Represents
Examples
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
...is the only compiler...
the Output window
the Settings dialog
select Enable Programmer
“Save project before build”
A dialog button
A tab
A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
A key on the keyboard
Click OK
Click the Power tab
4‘b0010, 2‘hF1
Italic Courier New
Sample source code
Filenames
File paths
Keywords
Command-line options
Bit values
Constants
A variable argument
Square brackets [ ]
Optional arguments
Curly brackets and pipe
character: { | }
Ellipses...
Choice of mutually exclusive
arguments; an OR selection
Replaces repeated text
#define START
autoexec.bat
c:\mcc18\h
_asm, _endasm, static
-Opa+, -Opa0, 1
0xFF, ‘A’
file.o, where file can be
any valid filename
mcc18 [options] file
[options]
errorlevel {0|1}
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 code supplied by
user
File>Save
Press <Enter>, <F1>
var_name [,
var_name...]
void main (void)
{ ...
}
RECOMMENDED READING
The following Microchip documents are recommended as supplemental reference
resources.
TC77 Data Sheet “Thermal Sensor with SPI Interface” (DS20092)
This data sheet provides detailed information regarding the TC77 device.
DS51484B-page 2
© 2006 Microchip Technology Inc.
Preface
THE MICROCHIP WEB SITE
Microchip provides online support via our web site at www.microchip.com. This web
site is used as a means to make files and information easily available to customers.
Accessible by using your favorite internet browser, the web site contains the following
information:
• Product Support – Data sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
•
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Development Systems Information Line
Customers should contact their distributor, representative or field application engineer
for support. Local sales offices are also available to help customers. A listing of sales
offices and locations is included in the back of this document.
Technical support is available through the web site at: http://support.microchip.com.
DOCUMENT REVISION HISTORY
Revision B (May 2006)
• Updated Bill of Materials (BOM) to show RoHS-compliant part numbers.
Revision A (June 2004)
• Initial Release of this Document.
© 2006 Microchip Technology Inc.
DS51484B-page 3
TC77 Thermal Sensor PICtail™ Demo Board User’s Guide
NOTES:
DS51484B-page 4
© 2006 Microchip Technology Inc.
TC77 THERMAL SENSOR PICtail™
DEMO BOARD USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
This chapter provides an overview of the TC77 Thermal Sensor PICtail™ Demo Board
and covers the following topics:
• What is the TC77 Thermal Sensor PICtail™ Demo Board?
• What the TC77 Thermal Sensor PICtail™ Demo Board Kit includes
1.2
WHAT IS THE TC77 THERMAL SENSOR PICtail™ DEMO BOARD?
The TC77 Thermal Sensor PICtail™ Demo Board demonstrates how to interface the
TC77 to a PICmicro® microcontroller using the PICkit™ 1 Flash Starter Kit as a
platform. A PIC16F676 14-pin Flash-based 8-bit CMOS microcontoller device is
included with the demo board and can be used with the PICkit 1 Flash Starter Kit.
Firmware that provides the SPI interface and temperature conversion routines to
communicate with the TC77 and convert the serial data to temperature is also included.
The TC77 Thermal Sensor PICtail™ Demo Board can also be used as a “stand-alone”
module to quickly add thermal sensing capablity to any existing application. This basic
sensor functionality is implemented on a small Printed Circuit Board (PCB) and an
interface via a standard 100 mil header.
1.3
WHAT THE TC77 THERMAL SENSOR PICtail™ DEMO BOARD KIT
INCLUDES
This TC77 Thermal Sensor PICtail™ Demo Board Kit includes:
• The TC77 Thermal Sensor PICtail™ Demo Board (102-00004)
• TC77 Thermal Sensor PICtail™ Demo Board User’s Guide (DS51484)
• AN913, “Interfacing the TC77 Thermal Sensor to a PICmicro® Microcontroller”,
(DS00913).
• PIC16F676 14-pin Flash-based 8-bit CMOS Microcontroller
• PIC16F676 Firmware
© 2006 Microchip Technology Inc.
DS51484B-page 5
TC77 Thermal Sensor PICtail™ Demo Board User’s Guide
NOTES:
DS51484B-page 6
© 2006 Microchip Technology Inc.
TC77 THERMAL SENSOR PICtail™
DEMO BOARD USER’S GUIDE
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The TC77 Thermal Sensor PICtail™ Demo Board demonstrates how to interface the
TC77 to a microcontroller for use by the system designer as an example of how to
integrate a digital temperature sensor into their system.
2.2
FEATURES
The TC77 Thermal Sensor PICtail™ Demo Board has the following features:
• Small PCB layout
• Standard 100 mil 14-pin header (P1) for easy interface to the PICkit™ 1 Flash
Starter Kit or custom application
2.3
GETTING STARTED
This section describes how to quickly configure the TC77 Thermal Sensor PICtail™
Demo Board and PICkit 1 Flash Starter Kit. A block diagram of the configuration is
provided in Figure 2-1. Refer to Application Note 913, “Interfacing the TC77 Thermal
Sensor to a PICmicro® Microcontroller” (DS00913), for detailed information on the
TC77 Thermal Sensor PICtail Board and the TC77 PICtail.HEX firmware.
PICkit™ 1 FLASH Starter Kit
TC77
Thermal
Sensor
PICmicro®
FLASH
MCU
PC
USB
J3
P1
3
SPI
Interface
VDD
GND
SPI
Interface
+5V
TC77 PICtail™
Demo Board
LED Array
D7 D6 D5 D4
D3 D2 D1 D0
FIGURE 2-1:
TC77 Thermal Sensor PICtail™ Demo Board Block Diagram.
© 2006 Microchip Technology Inc.
DS51484B-page 7
TC77 Thermal Sensor PICtail™ Demo Board User’s Guide
2.3.1
Hardware Setup
1. Connect the P1 header of the TC77 Thermal Sensor board to the J3 connector
on the PICkit 1 Flash Starter Kit board. Refer to Figure 2-2 for proper orientation
of the TC77 Thermal Sensor PICtail™ Demo Board and Figure 2-3 for a
simplified board schematic.
2. Insert the PIC16F676 into the evaluation socket of the PICkit 1 Flash Starter Kit
board.
3. Connect the PICkit 1 Flash Starter Kit USB cable from the USB port of the PC to
the USB port (J1) on the PICkit 1 Flash Starter Kit board. +5V power is supplied
to the PICkit 1 Flash Starter Kit board via the USB cable. The green POWER LED
and the red BUSY LED will turn on, indicating that power is being supplied to the
board.
Expansion
Header (J3)
USB Cable
TC77 PICtail™ Demo Board
LED D0
LED D7
Insert PIC16F676
PICkit™ 1 FLASH Starter Kit
FIGURE 2-2:
TC77 Thermal Sensor PICtail™ Demo Board and PICkit™1 FLASH Starter Kit.
PICkit™ 1
FLASH Starter Kit
J3
P1
13
13
+5V
TC77 PICtail™ Demo Board
5
C1
0.1µF
VDD
RC3
RC0
RC1
6
6
1
10
10
3
11
11
4
U1
TC77
CS
SCK
SI/O
VSS
14
GND
FIGURE 2-3:
DS51484B-page 8
14
2
Simplified TC77 Thermal Sensor PICtail™ Demo Board Schematic.
© 2006 Microchip Technology Inc.
Installation and Operation
2.3.2
Programming the PIC16F676
1. Download and install the PICkit 1 Flash Starter Kit software to your PC.
2. Copy the TC77 PICtail.HEX file supplied on the CD that came with this kit to
your PC.
3. When the PICkit 1 Flash Starter Kit is started, the main window will be displayed
on the PC as indicated in Figure 2-4.
FIGURE 2-4:
PICkit™ 1 Flash Starter Kit GUI Window on the PC.
4. Toggle device power to off by unchecking the Device Power box under Board
Controls in the PICkit 1 Flash Starter Kit window (Figure 2-4). The BUSY LED
on the PICkit 1 Flash Starter Kit board will turn off when the device power is
turned off.
5. Click on the Erase button in the window to ensure that the PIC16F676 device has
been erased.
6. From the File pull down menu, select Import HEX. A file window will appear.
Select and open TC77 PICtail.HEX.
7. Click on the Write Device button in the PICkit 1 Flash Starter Kit window. The
PIC16F676 device will be written to with the TC77 PICtail.HEX firmware.
Once completed, the status bar at the bottom of the window will indicate Write
Successful.
8. Toggle the device power on by checking the Device Power box under Board
Controls in the PICkit 1 Flash Starter Kit window. The BUSY LED on the PICkit 1
Flash Starter Kit board will turn on when device power is turned on. Some of the
red LEDs (D7-D0) will turn on as well.
© 2006 Microchip Technology Inc.
DS51484B-page 9
TC77 Thermal Sensor PICtail™ Demo Board User’s Guide
At this point, the PIC16F676 is reading the temperature data from the TC77 and
displaying that temperature on the eight red LEDs (D7-D0) on the PICkit 1 Flash Starter
Kit board. The ten’s digit of the temperature data is represented by bits, D7-D4, with D7
being defined as the Most Significant bit (MSb). The one’s digit is defined by bits,
D3-D0, with D3 serving as the MSb.
The temperature can be displayed in degrees Fahrenheit or Celsius. The board
defaults to the temperature being displayed in Fahrenheit. To display the temperature
in Celsius, depress the SW1 push button switch on the PICkit 1 Flash Starter Kit board.
The display will change back to Fahrenheit when SW1 is released.
Table 2-1 provides a list of the LED patterns that correspond to the Binary Code
Decimal (BCD) coding representation of the temperature measurement.
TABLE 2-1:
BCD CODE REPRESENTATION ON PICkit™ 1 FLASH STARTER
KIT LEDS
Binary
BCD
Number
D7
D3
D6
D2
D5
D1
D4
D0
0000
0
OFF
OFF
OFF
OFF
0001
1
OFF
OFF
OFF
ON
0010
2
OFF
OFF
ON
OFF
0011
3
OFF
OFF
ON
ON
0100
4
OFF
ON
OFF
OFF
0101
5
OFF
ON
OFF
ON
0110
6
OFF
ON
ON
OFF
0111
7
OFF
ON
ON
ON
1000
8
ON
OFF
OFF
OFF
1001
9
ON
OFF
OFF
ON
For example, a temperature reading of 75°F will be displayed by turning on LEDs D6,
D5, D4, D2 and D0 (LEDs D7, D3 and D1 will be turned off), as indicated in Figure 2-5.
DS51484B-page 10
© 2006 Microchip Technology Inc.
J3
Installation and Operation
TC77 Thermal Sensor
Demo Board
D6
D5
D4
D3
D2
D1
D0
5
POWER BUSY
Temperature
Displayed in
BCD
D7
7
FIGURE 2-5:
PICkit™1 Flash
Starter Kit Board
PICkit™ 1 Flash Starter Kit LED Display of 75°F.
The temperature display will change when the temperature of the TC77 is varied. A
simple example of this can be seen by pressing your finger on the TC77 device (U1)
on the TC77 Thermal Sensor PICtail™ Demo Board. More dramatic changes can be
seen by applying heat to the TC77 with a hair dryer or hot air gun, or cooling the device
down.
Refer to the TC77 Data Sheet, “Thermal Sensor with SPI™ Interface” (DS20092) for
more information on the TC77 and Application Note 913, “Interfacing the TC77 Thermal
Sensor to a PICmicro® Microcontroller” (DS00913) for more information on the TC77
Thermal Sensor PICtail™ Demo Board and the TC77 PICtail.HEX firmware.
© 2006 Microchip Technology Inc.
DS51484B-page 11
TC77 Thermal Sensor PICtail™ Demo Board User’s Guide
NOTES:
DS51484B-page 12
© 2006 Microchip Technology Inc.
TC77 THERMAL SENSOR PICtail™
DEMO BOARD USER’S GUIDE
Appendix A. Schematic and Layouts
A.1
INTRODUCTION
This appendix contains the following schematics and layouts for the TC77 Thermal
Sensor PICtail™ Demo Board:
•
•
•
•
Board Schematic
Board - Top Layer
Board - Silk screen Layer
Board - Bottom Layer
© 2006 Microchip Technology Inc.
DS51484B-page 13
TC77 Thermal Sensor PICtail™ Demo Board User’s Guide
A.2
BOARD SCHEMATIC
PICkit™ Flash Starter Kit
Expansion Header J3
A.3
BOARD - TOP LAYER
DS51484B-page 14
© 2006 Microchip Technology Inc.
Schematic and Layouts
A.4
BOARD - SILK SCREEN LAYER
A.5
BOARD - BOTTOM LAYER
© 2006 Microchip Technology Inc.
DS51484B-page 15
TC77 Thermal Sensor PICtail™ Demo Board User’s Guide
NOTES:
DS51484B-page 16
© 2006 Microchip Technology Inc.
TC77 THERMAL SENSOR PICtail™
DEMO BOARD USER’S GUIDE
Appendix B. Bill Of Materials (BOM)
TABLE B-1:
Qty
BILL OF MATERIALS (BOM)
Designator
Description
Manufacturer
®
1
C1
CAP .1UF 25V CERAMIC X7R 0805
1
P1
CONN HEADER .100 SINGL R/A
14POS
2
P2,P3,
"Do Not Populate" Header, single pin
N/A
N/A
1
PCB
Lead Free RoHS Compliant PCBs
N/A
104-00005
1
U1
TC77 Thermal Sensor with SPI Interface
© 2006 Microchip Technology Inc.
Panasonic - ECG
Part Number
Sullins Electronics Corp.
Microchip Technology Inc
ECJ-2VB1E104K
PEC14SBAN
TC77-5.0MCTTR
DS51484B-page 17
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02/16/06
DS51484B-page 18
© 2006 Microchip Technology Inc.