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TC77-3.3MCTTR 开发手册 - Microchip（微芯）
制造商:
Microchip（微芯）
分类:
温度传感器
封装:
SOT-23-5
描述:
MICROCHIP TC77-3.3MCTTR 温度传感器芯片, 数字式, ± 1°C, -55 °C, +125 °C, SOT-23, 5 引脚
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TC77-3.3MCTTR数据手册
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若手册格式错乱，请下载阅览PDF原文件
2004 Microchip Technology Inc. DS00913A-page 1
M
AN913
INTRODUCTION
Silicon temperature sensors offer an easy-to-use alter-
native to traditional temperature sensors, such as ther-
mocouple, thermistors and RTDs. The TC77 SPI™
Thermal Silicon Sensor is especially suited for embed-
ded systems, due to its SPI interface. This serves to
provide a straight-forward and easy way to interface to
a microcontroller. This application note will discuss
system integration, firmware implementation and PCB
layout techniques for the TC77 in an embedded
system.
Microchip has developed a hardware platform called
the PICkit™ 1 FLASH Starter Kit, allowing the designer
to quickly begin their system development. Addition-
ally, Microchip has developed a TC77 PICtail™ Daugh-
ter Board that interfaces directly to the PICkit 1 FLASH
Starter Kit. These two boards are used to demonstrate
the techniques for integrating the TC77 into an embed-
ded systems environment. Both of these development
boards are available on the Microchip web site at
www.microchip.com.
The TC77 SPI™ Thermal Sensor PICtail™ daughter
board is designed to demonstrate the ease of
integrating a digital silicon IC temperature sensor to a
PICmicro
®
microcontroller unit (MCU). The TC77
PICtail daughter board plugs into the PICkit 1 FLASH
Starter Kit expansion header J3, as shown in Figure 1.
The PICkit 1 FLASH Starter Kit is a low-cost
development kit with an easy-to-use interface for
programming Microchip’s 8-pin and 14-pin FLASH
family of microcontrollers.
The TC77 demonstration is designed to measure and
display temperature in binary coded decimal (BCD)
with the PICkit 1 LEDs. The TC77 is a CMOS silicon
digital temperature sensor particularly suited for low
cost and small form-factor applications. Temperature
data is converted from the internal thermal sensing
element and made available as a 13-bit two’s
compliment digital word. The TC77 offers many
system-level advantages, including the integration of
the temperature sensor and signal conditioning cir-
cuitry on a single chip that is connected to the PICkit 1
through the SPI compatible interface.
Gerber files for the Printed Circuit Board (PCB), source
code and hex file to program a PIC16F676 are included
in the companion zip file “00913.zip”.
FIGURE 1: Block Diagram of the TC77 Thermal Sensor Demonstration.
Author: Steve Bible and Jim Lepkowski
Microchip Technology Inc.
TC77
V
DD
PICmicro
®
FLASH
TC77 PICtail™
SPI™
Interface
SPI™
Interface
GND
Thermal
Sensor
MCU
PICkit™ 1 FLASH Starter Kit
Daughter Board
PC
USB
LED Array
D0D1D2D3
D4D5D6D7
J3
3
+5V
P1
Temp. Data
Tens Digit
Ones Digit
Interfacing the TC77 Thermal Sensor to a PICmicro
®
Microcontroller
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