TC72
Digital Temperature Sensor
PICtail™ Demo Board
User’s Guide
© 2006 Microchip Technology Inc.
DS51482B
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The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, KEELOQ, microID, MPLAB, PIC, PICmicro, PICSTART,
PRO MATE, PowerSmart, rfPIC and SmartShunt are
registered trademarks of Microchip Technology Incorporated
in the U.S.A. and other countries.
AmpLab, FilterLab, Migratable Memory, MXDEV, MXLAB,
SEEVAL, SmartSensor and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, dsPICDEM,
dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR,
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,
PowerMate, PowerTool, REAL ICE, rfLAB, rfPICDEM, Select
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Printed on recycled paper.
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PICmicro® 8-bit MCUs, KEELOQ® code hopping devices, Serial
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DS51482B-page ii
© 2006 Microchip Technology Inc.
TC72 DIGITAL TEMPERATURE SENSOR
PICtail™ DEMO BOARD USER’S GUIDE
Table of Contents
Preface ........................................................................................................................... 1
Chapter 1. Product Overview ....................................................................................... 5
1.1 Introduction ..................................................................................................... 5
1.2 What is the TC72 Digital Temperature Sensor PICtail™ Demo Board? ........ 5
1.3 What the TC72 Digital Temperature 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.
DS51482B-page iii
TC72 Digital Temperature Sensor PICtail™ Demo Board User’s Guide
NOTES:
DS51482B-page iv
© 2006 Microchip Technology Inc.
TC72 DIGITAL TEMPERATURE 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
TC72 Digital Temperature 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 TC72 Digital Temperature Sensor PICtail™
Demo Board as a development tool. The manual layout is as follows:
• Chapter 1. “Product Overview” – Important information about the TC72 Digital
Temperature Sensor PICtail™ Demo Board.
• Chapter 2. “Installation and Operation”– Includes instructions on how to get
started with the TC72 Digital Temperature Sensor PICtail™ Demo Board.
• Appendix A. “Schematic and Layouts” – Shows the schematic and layout
diagrams for the TC72 Digital Temperature Sensor PICtail™ Demo Board.
• Appendix B. “Bill Of Materials (BOM)” – Lists the parts used to build the TC72
Digital Temperature Sensor PICtail™ Demo Board.
© 2006 Microchip Technology Inc.
DS51482B-page 1
TC72 Digital Temperature 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
For more information regarding the TC72 device, the following is recommended
reading:
TC72 Data Sheet “Digital Temperature Sensor w/SPI Interface” (DS21743)
This data sheet provides detailed information regarding the TC72 device.
DS51482B-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.
DS51482B-page 3
TC72 Digital Temperature Sensor PICtail™ Demo Board User’s Guide
NOTES:
DS51482B-page 4
© 2006 Microchip Technology Inc.
TC72 DIGITAL TEMPERATURE SENSOR
PICtail™ DEMO BOARD USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
This chapter provides an overview of the TC72 Digital Temperature Sensor PICtail™
Demo Board and covers the following topics:
• What is the TC72 Digital Temperature Sensor PICtail™ Demo Board?
• What the TC72 Digital Temperature Sensor PICtail™ Demo Board Kit includes
1.2
WHAT IS THE TC72 DIGITAL TEMPERATURE SENSOR PICTAIL™ DEMO
BOARD?
The TC72 Digital Temperature Sensor PICtail™ Demo Board demonstrates how to
interface the TC72 device 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, which can be used with the PICkit 1 Flash
Starter Kit, along with firmware that provides the SPI interface and temperature
conversion routines to communicate with the TC72 and convert the serial data to
temperature.
The TC72 Digital Temperature 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 interfaced via a standard 100 mil header.
1.3
WHAT THE TC72 DIGITAL TEMPERATURE SENSOR PICTAIL™ DEMO
BOARD KIT INCLUDES
This TC72 Digital Temperature Sensor PICtail™ Demo Board Kit includes:
• The TC72 Digital Temperature Sensor PICtail™ Demo Board (102-00013)
• TC72 Digital Temperature Sensor PICtail™ Demo Board User’s Guide (DS51482)
• AN940, “Interfacing the TC72 Digital Temperature Sensor to a PICmicro®
Microcontroller” (DS00940)
• PIC16F676 14-pin Flash-based 8-bit CMOS Microcontroller
• PIC16F676 Firmware (TC72 PICtail.HEX)
© 2006 Microchip Technology Inc.
DS51482B-page 7
TC72 Digital Temperature Sensor PICtail™ Demo Board User’s Guide
NOTES:
DS51482B-page 8
© 2006 Microchip Technology Inc.
TC72 DIGITAL TEMPERATURE SENSOR
PICtail™ DEMO BOARD USER’S GUIDE
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The TC72 Digital Temperature Sensor PICtail™ Demo Board demonstrates how to
interface the TC72 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 TC72 Digital Temperature 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 set up the TC72 Digital Temperature Sensor
PICtail™ Demo Board and PICkit 1 Flash Starter Kit. A block diagram of the setup is
presented in Figure 2-1. Refer to Application Note 940, “Interfacing the TC72 Digital
Temperature Sensor to a PICmicro® Microcontroller” (DS00940) for detailed
information on the TC72 Digital Temperature Sensor PICtail Board and the TC72
PICtail.HEX firmware.
PICkit™ 1 FLASH Starter Kit
TC72
Temperature
Sensor
PICmicro®
FLASH
MCU
PC
USB
J3
P1
4
SPI
Interface
VDD
GND
SPI
Interface
+5V
TC72 PICtail™
Demo Board
LED Array
D7 D6 D5 D4
D3 D2 D1 D0
FIGURE 2-1:
TC72 Digital Temperature Sensor PICtail™ Demo Board Block Diagram.
© 2006 Microchip Technology Inc.
DS51482B-page 7
TC72 Digital Temperature Sensor PICtail™ Demo Board User’s Guide
2.3.1
Hardware Setup
1. Connect the P1 header of the TC72 Digital Temperature Sensor PICtail™ Demo
Board to the J3 connector on the PICkit 1 Flash Starter Kit board. Refer to
Figure 2-2 for proper orientation of the TC72 Digital Temperature Sensor
PICtail™ Demo Board and Figure 2-3 for the 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
U1
TC72 PICtail™ Demo Board
LED D0
LED D7
Insert PIC16F676
PICkit™ 1 FLASH Starter Kit
FIGURE 2-2:
Kit.
TC72 Digital Temperature Sensor PICtail™ Demo Board and PICkit™ 1 FLASH Starter
PICkit™ 1
FLASH Starter Kit
+5V
J3
13
TC72 PICtail™ Demo Board
P1
13
8
VDD
RC3
RC0
RC2
RC1
GND
FIGURE 2-3:
DS51482B-page 8
C1
0.1µF
TC72
(MSOP-8)
2
CE
6
6
10
10
3
12
12
6
11
11
5
14
14
SCK
U1
SDI
SDO
GND
4
Simplified TC72 Digital Temperature 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 TC72 PICtail.HEX file supplied on the CD that came with this kit to
your PC.
3. Once 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 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 once 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 “TC72 PICtail.HEX”.
7. Click on the Write Device button in the PICkit 1 Flash Starter Kit window. The
PIC16F676 device will be written to by the TC72 PICtail.HEX firmware. When
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 once the device power is turned on. Some of the
red LEDs (D7-D0) will turn on as well.
© 2006 Microchip Technology Inc.
DS51482B-page 9
TC72 Digital Temperature Sensor PICtail™ Demo Board User’s Guide
At this point, the PIC16F676 is reading the temperature data from the TC72 and
displaying the 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 once the SW1 push button switch 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.
DS51482B-page 10
© 2006 Microchip Technology Inc.
J3
Installation and Operation
TC72 Temp 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 TC72 is varied. A
simple example of this can be seen by pressing your finger on the TC72 device (U1)
on the TC72 Digital Temperature Sensor PICtail™ Demo Board. More dramatic
changes can be seen by applying heat to the TC72 with a hair dryer or hot air gun, or
by cooling the device down.
Refer to the TC72 data sheet, “Digital Temperature Sensor with SPI™ Interface”
(DS21743), for more information on the TC72 and Application Note 940, “Interfacing
the TC72 Digital Temperature Sensor to a PICmicro® Microcontroller” (DS00940) for
more information on the TC72 Digital Temperature Sensor PICtail™ Demo Board and
the TC72 PICtail.HEX firmware.
© 2006 Microchip Technology Inc.
DS51482B-page 11
TC72 Digital Temperature Sensor PICtail™ Demo Board User’s Guide
NOTES:
DS51482B-page 12
© 2006 Microchip Technology Inc.
TC72 DIGITAL TEMPERATURE 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 TC72 Digital
Temperature Sensor PICtail™ Demo Board:
•
•
•
•
Board Schematic
Board - Top Layer
Board - Silk Screen Layer
Board - Bottom Layer
© 2006 Microchip Technology Inc.
DS51482B-page 7
TC72 Digital Temperature Sensor PICtail™ Demo Board User’s Guide
A.2
BOARD SCHEMATIC
PICkit™ 1 Flash Starter Kit
Expansion Header J3
A.3
BOARD - TOP LAYER
DS51482B-page 8
© 2006 Microchip Technology Inc.
Schematic and Layouts
A.4
BOARD - SILK SCREEN LAYER
A.5
BOARD - BOTTOM LAYER
© 2006 Microchip Technology Inc.
DS51482B-page 9
TC72 Digital Temperature Sensor PICtail™ Demo Board User’s Guide
NOTES:
DS51482B-page 10
© 2006 Microchip Technology Inc.
TC72 DIGITAL TEMPERATURE SENSOR
PICtail™ DEMO BOARD USER’S GUIDE
Appendix B. Bill Of Materials (BOM)
Qty
Designator
Description
Manufacturer
®
Part Number
1
C1
CAP .1UF 25V CERAMIC X7R 0805
Panasonic - ECG
ECJ-2VB1E104K
1
P1
CONN HEADER .100 SINGL R/A
14POS
Sullins Electronics Corp.
PEC14SBAN
1
Programmed
PICmicro®
Microcontroller
"Packaged in a Separate ESD Bag"
PIC16F676 14-Pin Flash-based 8-bit
CMOS Microcontroller.
Microchip Technology Inc.
PIC16F676-I/P
1
PCB
Lead Free RoHS-compliant PCBs
—
104-00013
1
U1
TC72 Digital Temperature Sensor
Microchip Technology Inc.
TC72-5.0MUA
© 2006 Microchip Technology Inc.
DS51482B-page 7
WORLDWIDE SALES AND SERVICE
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EUROPE
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Fax: 480-792-7277
Technical Support:
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Web Address:
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Tel: 45-4450-2828
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Tel: 886-3-572-9526
Fax: 886-3-572-6459
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Tel: 886-7-536-4818
Fax: 886-7-536-4803
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Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
02/16/06
DS51482B-page 18
© 2006 Microchip Technology Inc.