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出了一種利用ATmega8單片機(jī)對ISD2500系列語音芯片進(jìn)行控制的智能語音系統(tǒng)，此系統(tǒng)使用靈活，易于功能升級，具有良好的應(yīng)用前景。提供了硬件連接電路和關(guān)鍵源程序。 Abstract: An intelligent voice system using ISD2500 series voice chips based on ATmega8 MCU is Described.This system is flexible and easy to upgrade for users,and it has pretty good using foreground. The circuit diagram and the key program are also provided.
標(biāo)簽： ATmega8 2500 ISD 智能語音
上傳時間： 2014-01-22
上傳用戶：Artemis
Information in this document is subject to change without notice and does notrepresent a commitment on the part of the manufacturer. The software Describedin this document is furnished under license agreement or nondisclosureagreement and may be used or copied only in accordance with the terms of theagreement. It is against the law to copy the software on any medium except asspecifically allowed in the license or nondisclosure agreement. The purchasermay make one copy of the software for backup purposes. No part of this manualmay be reproduced or transmitted in any form or by any means, electronic ormechanical, including photocopying, recording, or information storage andretrieval systems, for any purpose other than for the purchaser’s personal use,without written permission.
上傳時間： 2014-12-27
上傳用戶：Tracey
基于AT89C52單片機(jī)的步進(jìn)電機(jī)控制系統(tǒng)設(shè)計 摘 要: 提出了一個由AT89C52單片機(jī)控制步進(jìn)電機(jī)的實例?？梢酝ㄟ^鍵盤輸入相關(guān)數(shù)據(jù), 并根據(jù)需要, 實時對步進(jìn)電機(jī)工作方式進(jìn)行設(shè)置, 具有實時性和交互性的特點。該系統(tǒng)可應(yīng)用于步進(jìn)電機(jī)控制的大多數(shù)場合。實踐表明, 系統(tǒng)性能優(yōu)于傳統(tǒng)的步進(jìn)電機(jī)控制器。 關(guān)鍵詞: 單片機(jī); 步進(jìn)電動機(jī); 直流固態(tài)繼電器; 實時控制 ABSTRACT: A stepp ing motor control system based on AT89C52 chip microcomputer was Described.The data can be inputwith keyboard, and stepp ingmotorwas controlled by these data. According to the demand, users can set the workingmodel of stepp ingmotor in real2time. This system can be widely used in stepp ing motor controlling. The p ractice showed that the performance of this system outdid the tradi-tional stepp ing motor controller.
上傳時間： 2013-11-22
上傳用戶：vodssv
The outputs of the PCA9518 are immediately available as soon as there is a voltage present on thesupply >~1V and behave as Described above. The power-on reset of the PCA9518A keeps the outputsturned off during power-up and maintains the high impedance of the outputs throughout the power-upcycle. There is an additional built-in delay after power-up that allows the analog circuits to stabilize beforethe part is activated.
標(biāo)簽： Replacement 9518 NXP PCA
上傳時間： 2013-10-26
上傳用戶：13817753084
文章提出了一種精簡指令集8 位單片機(jī)中, 算術(shù)邏輯單元的工作原理。在此基礎(chǔ)上, 對比傳統(tǒng)PIC 方案、以及在ALU 內(nèi)部再次采用流水線作業(yè)的332 方案、44 方案, 并用Synopsys 綜合工具實現(xiàn)了它們。綜合及仿真結(jié)果表明, 根據(jù)該單片機(jī)系統(tǒng)要求, 44 方案速度最高, 比332 方案可提高43.9%, 而面積僅比最小的332 方案增加1.6%。在分析性能差異的根本原因之后, 闡明了該方案的優(yōu)越性。關(guān)鍵詞: 單片機(jī), 精簡指令集, 算術(shù)邏輯單元, 流水線 Abstract: Work principle for ALU in an 8_bit RISC Singlechip microcomputer is Described. The traditional PIC scheme, 332 Pipeline scheme and 44 Pipeline scheme are compared on the base of the principle, which are implemented using Synopsys design tools. Results from synthesis and simulation shows that 44 scheme operates the fast, which is 43.9% faster and only 1.6% larger than 332 scheme. The essential reason why the performance is so different is analyzed.Then the advantage of 44 scheme is clarified.Key words: Singlechip, Microcomputer, RISC, ALU, Pipeline
上傳時間： 2013-10-18
上傳用戶：xiaoyaa
Abstract: This application note explains the hardware of different types of 1-Wire® interfaces and software examples adapted to this hardware with a focus on serial ports. Depending on the types of iButtons required for a project and the type of computer to be used, the most economical interface is easily found. The hardware examples shown are basically two different types: 5V general interface and 12V RS-232 interface. Within the 5V group a common printed circuit board could be used for all circuits Described. The variations can be achieved by different populations of components. The same principal is used for the 12V RS-232 interface. The population determines if it is a Read all or a Read/Write all type of interface. There are other possible circuit implementations to create a 1-Wire interface. The circuits Described in this application note cover many different configurations. For a custom application, one of the Described options can be adapted to meet individual needs.
標(biāo)簽： iButtons Reading Writing and
上傳時間： 2013-10-29
上傳用戶：long14578
The 87LPC76X Microcontroller combines in a small package thebenefits of a high-performance microcontroller with on-boardhardware supporting the Inter-Integrated Circuit (I2C) bus interface.The 87LPC76X can be programmed both as an I2C bus master, aslave, or both. An overview of the I2C bus and description of the bussupport hardware in the 87LPC76X microcontrollers appears inapplication note AN464, Using the 87LPC76X Microcontroller as anI2C Bus Master. That application note includes a programmingexample, demonstrating a bus-master code. Here we show anexample of programming the microcontroller as an I2C slave.The code listing demonstrates communications routines for the87LPC76X as a slave on the I2C bus. It compliments the program inAN464 which demonstrates the 87LPC76X as an I2C bus master.One may demonstrate two 87LPC76X devices communicating witheach other on the I2C bus, using the AN464 code in one, and theprogram presented here in the other. The examples presented hereand in AN464 allow the 87LPC76X to be either a master or a slave,but not both. Switching between master and slave roles in amultimaster environment is Described in application note AN435.The software for a slave on the bus is relatively simple, as theprocessor plays a relatively passive role. It does not initiate bustransfers on its own, but responds to a master initiating thecommunications. This is true whether the slave receives or transmitsdata—transmission takes place only as a response to a busmaster’s request. The slave does not have to worry about arbitrationor about devices which do not acknowledge their address. As theslave is not supposed to take control of the bus, we do not demandit to resolve bus exceptions or “hangups”. If the bus becomesinactive the processor simply withdraws, not interfering with themaster (or masters) on the bus which should (hopefully) try toresolve the situation.
標(biāo)簽： routines slave I2C 87L
上傳時間： 2013-11-19
上傳用戶：shirleyYim
MPC7400 Part Number SpeciÞcationThis document describes part number speciÞc changes to recommended operating conditions and revised electrical speciÞcations,as applicable, from those Described in the generalMPC7400 Hardware SpeciÞcations.SpeciÞcations provided in this Part Number SpeciÞcation supersede those in theMPC7400 Hardware SpeciÞcationsdated 9/99(order #: MPC7400EC/D) for these part numbers only; speciÞcations not addressed herein are unchanged. This document isfrequently updated, refer to the website at http://www.mot.com/SPS/PowerPC/ for the latest version.Note that headings and table numbers in this data sheet are not consecutively numbered. They are intended to correspond to theheading or table affected in the general hardware speciÞcation.
標(biāo)簽： Number Speci 7400 Part
上傳時間： 2014-12-28
上傳用戶：huyahui
This document describes part number speciÞc changes to recommended operating conditions and revised electrical speciÞcations,as applicable, from those Described in the generalMPC7400 Hardware SpeciÞcations.SpeciÞcations provided in this Part Number SpeciÞcation supersede those in theMPC7400 Hardware SpeciÞcationsdated 9/99(order #: MPC7400EC/D) for these part numbers only; speciÞcations not addressed herein are unchanged. This document isfrequently updated, refer to the website at http://www.mot.com/SPS/PowerPC/ for the latest version.Note that headings and table numbers in this data sheet are not consecutively numbered. They are intended to correspond to theheading or table affected in the general hardware speciÞcation.Part numbers addressed in this document are listed in Table A. For more detailed ordering information see Table B.
上傳時間： 2013-11-19
上傳用戶：qiaoyue
提出了一個由AT89C52單片機(jī)控制步進(jìn)電機(jī)的實例?？梢酝ㄟ^鍵盤輸入相關(guān)數(shù)據(jù), 并根據(jù)需要, 實時對步進(jìn)電機(jī)工作方式進(jìn)行設(shè)置, 具有實時性和交互性的特點。該系統(tǒng)可應(yīng)用于步進(jìn)電機(jī)控制的大多數(shù)場合。實踐表明, 系統(tǒng)性能優(yōu)于傳統(tǒng)的步進(jìn)電機(jī)控制器。關(guān)鍵詞: 單片機(jī); 步進(jìn)電動機(jī); 直流固態(tài)繼電器; 實時控制Con trol System of Stepp ingMotor Ba sed on AT89C52 ChipM icrocomputerMENGWu2sheng, L ILiang (College of Automatization, Northwestern Polytechnical Unversity, Xipan 710072, China)ABSTRACT: A stepp ing motor control system based on AT89C52 chip microcomputer was Described.The data can be inputwith keyboard, and stepp ingmotorwas controlled by these data. According to the demand, users can set the workingmodel of stepp ingmotor in real2time. This system can be widely used in stepp ing motor controlling. The p ractice showed that the performance of this system outdid the tradi tional stepp ing motor controller.KEY WORDS: Chip microcomputer; Stepp ingmotor; DCSSR; Real2time control
標(biāo)簽： Control System ingMot Stepp
上傳時間： 2013-11-19
上傳用戶：leesuper
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