FEATURES
Unique 1-Wire interface requires only one port pin for communication
Multidrop capability simplifies distributed temperature sensing applications
Requires no external components
Can be powered from data line. Power supply range is 3.0V to 5.5V
Zero standby power required
Measures temperatures from -55°C to +125°C. Fahrenheit equivalent is -67°F to +257°F
±0.5°C accuracy from -10°C to +85°C
Thermometer resolution is programmable from 9 to 12 bits
Converts 12-bit temperature to digital word in 750 ms (max.)
User-definable, nonvolatile temperature alarm settings
Alarm search command identifies and addresses devices whose temperature is outside of programmed limits (temperature
alarm condition)
Applications include thermostatic controls, industrial systems, consumer products,
thermometers, or any thermally sensitive system
·詳細說明：外掛硬盤和FLASH的MP3播放器解決方案，用C和匯編編寫，并附帶有電路原理圖- outside hangs the hard disk and the FLASH MP3 player solution, with C and the assembly compilation, and has the electric circuit schematic diagram in pass
Abstract: A perfect voltage reference produces a stable voltage independent of any external factors. Real-world voltagereferences, of course, are subject to errors caused by many external factors. One causeof these major errors istemperature. Without care, it is easy to operate a voltage reference outside its operating temperature range. Thisapplication note describes how references respond to temperature changes, and how self-heating can cause a voltagereference to operate outside its recommended temperature range. Once understood, this knowledge can then be used toavoid making this design error.
This book evolved over the past ten years from a set of lecture notes developed while teaching
the undergraduate Algorithms course at Berkeley and U.C. San Diego. Our way of teaching
this course evolved tremendously over these years in a number of directions, partly to address
our students' background (undeveloped formal skills outside of programming), and partly to
reect the maturing of the eld in general, as we have come to see it. The notes increasingly
crystallized into a narrative, and we progressively structured the course to emphasize the
?story line? implicit in the progression of the material. As a result, the topics were carefully
selected and clustered. No attempt was made to be encyclopedic, and this freed us to include
topics traditionally de-emphasized or omitted from most Algorithms books.
2005
Center for Biological & Computational Learning at MIT and MIT
All rights reserved.
Permission to copy and modify this data, software, and its documentation only
for internal research use in your organization is hereby granted, provided
that this notice is retained thereon and on all copies. This data and software
should not be distributed to anyone outside of your organization without
explicit written authorization by the author(s) and MIT.
In this paper, we describe the development of a mobile butterfly-watching learning (BWL)
system to realize outdoor independent learning for mobile learners. The mobile butterfly-watching
learning system was designed in a wireless mobile ad-hoc learning environment. This is first result
to provide a cognitive tool with supporting the independent learning by applying PDA with
wireless communication technology to extend learning outside of the classroom. Independent
learning consists of self-selection, self-determination, self-modification, and self-checking.
