Demonstration circuit 1562A is an engineering toolto design and evaluate the LTC699X-X family ofTimerBlox circuits. The center section of the boardcontains a pre-configured TimerBlox function.DC1562A comes in twelve timing function variationsas outlined in Table 1.Surrounding the center board is a ”playground”prototyping area. The prototyping area has padsfor Dip-8, S8, MS8, or S6 packages with breadboarding connections to each pin and two convenientpower buses and ground bus surrounding theentire area. This area is for conditioning signals tocontrol the timer function and for adding loads controlled in time.
上传时间： 2013-10-18
上传用户：如果你也听说
#include<iom16v.h> #include<macros.h> #define uint unsigned int #define uchar unsigned char uint a,b,c,d=0; void delay(c) { for for(a=0;a<c;a++) for(b=0;b<12;b++); }; uchar tab[]={ 0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,
上传时间： 2013-10-21
上传用户：13788529953
Designing read/write device (RWD) units for industrial RF-Identification applications is strongly facilitated by the NXP Semiconductors HITAG Reader Chip HTRC110. All needed function blocks, like the antenna driver, modulator demodulator and antenna diagnosis unit, are integrated in the HTRC110. Therefore only a minimum number of additional passive components are required for a complete RWD. This Application Note describes how to design an industrial RF-Identification system with the HTRC110. The major focus is dimensioning of the antenna, all other external components including clock and power supply, as well as the demodulation principle and its implementatio
上传时间： 2013-10-22
上传用户：zhengjian
Designing Boards with Atmel AT89C51,AT89C52, AT89C1051, and AT89C2051 for Writing Flash at In-Circuit Test. Recent improvements in chips and testers have made it possible for the tester to begin taking over the role tradi-tionally assigned to the PROM program-mer. Instead of having a PROM pro- grammer write nonvolatile memories before assembling the board, the in-cir- cuit tester writes them during in-circuit testing operations. Many Teradyne Z18- series testers are now in use loading code into nonvolatile memories, micro- controllers and in-circuit programmable logic devices. The purpose of this note is to explain how the Z18 approaches the writing task for Atmel AT89C series IC’s, so that designers of boards using these chips can get the best results.
上传时间： 2013-11-17
上传用户：xiaozhiqban
AVR32801: UC3A3 Schematic Checklist Features • Power circuit • Reset circuit • USB connection • External bus interface • ABDAC sound DAC interface • JTAG and Nexus debug ports • Clocks and crystal oscillators • MMC, SD-card, SDHC, SDIO and CE-ATA interface 1 Introduction A good hardware design comes from a proper schematic. Since UC3A3 devices have a fair number of pins and functions, the schematic for these devices can be large and quite complex. This application note describes a common checklist which should be used when starting and reviewing the schematics for a UC3A3 design.
标签： Schematic 32801 UC3A3 Chec
上传时间： 2014-12-26
上传用户：DXM35
在深入了解Flash存储器的基础上，采用单片机自动检测存储器无效块。主要通过读取每一块的第1、第2页内容，判断该块的好坏，并给出具体的实现过程，以及部分关键的电路原理图和C语言程序代码。该设计最终实现单片机自动检测Flash坏块的功能，并通过读取ID号检测Flash的性能，同时该设计能够存储和读取1GB数据。 Abstract: On the basis of in-depth understanding the Flash chips，this paper designs a new program which using the SCM to detect the invalid block.Mainly through reading the data of the first and second page to detect the invalid block.Specific implementation procedure was given,and the key circuit schematic diagram and C language program code was introduced.This design achieved the function of using the MCU checks the invalid block finally，and increased the function by reading the ID number of Flash to get the performance of the memory.And the design also can write and read1GB data
上传时间： 2013-10-25
上传用户：taozhihua1314
设计一种基于P89V51RD2的功率因数测量仪，采用光电隔离器和专用数码管驱动器。该测量仪是以增强型单片机P89V51RD2为核心，大大简化系统硬件设计。而软件部分采用模块化设计思想，采用中值滤波和小数补偿算法，实现功率因数的高精度测量。实验测试表明，该功率因数测量仪测量精度高，运行稳定可靠。 Abstract: A power－factor measurement instrument based on P89V51RD2is designed，which uses optical coupler and specific LED drive chip.The power factor measurement instrument uses P89V51RD2as a core of which greatly simplifies the system design.Furthermore，modularization software is developed in detail.The high precision power－factor measuring system is realized by the center value filter and fractional compensation algorithm.Experiments manifests that the power－ factor measurement instrument is high precision，steady and reliable.
上传时间： 2014-12-27
上传用户：CHINA526
针对盘山路存在的转弯盲区，即在转弯时司机无法得知弯路对面是否有车辆通过，设计一种基于C8051F310的山路转弯预防警示系统。该系统利用一阶滤波算法检测山路转弯时是否有车辆通过。运用该算法可增强系统检测的实时性，提高检测机动车辆的灵敏度，同时大大减少环境温度对检测的干扰。试验表明该系统能够正确指示出在山路转弯时是否有车辆通过，目前该系统已安装在盘山路上，可大大减少事故的发生率。 Abstract: Aiming at passing hilly road，there is a turn blind spot.Motormen usually do not know if the passing of vehicles pass the road.So a system of defending accident on hilly road is designed,which is based on MCU C8051F310.The sys-tem uses the first-order filter algorithm to detect whether there are passing vehicles.This algorithm enhances the real-time detection and improves the sensitivity of detection vehicles.Meanwhile,it reduces the detection interference of environmen-tal temperature.The experimental results show that this system can exactly indicate if there are passing vehicles.At present,the system has been successfully applied to hilly road.The system can greatly decrease accident.
上传时间： 2013-10-10
上传用户：归海惜雪
以89S52单片机和EP1C6Q240C8型FPGA为控制核心的多功能计数器，是由峰值检波、A/D转换、程控放大、比较整形、移相网络部分组成,可实现测量正弦信号的频率、周期和相位差的功能。多功能计数器采用等精度的测量方法，可实现频率为1Hz～10MHz、幅度为0.01～5Vrms的正弦信号的精确测频，以及频率为10Hz～100kHz、幅度为0.5～5Vrms的正弦信号精确测相。液晶显示器能够实时显示当前信号的频率、周期和相位差。该多功能计数器精度高，界面友好，实用性强。 Abstract: A multi-function counter，which uses89S52MCU and EP1C6Q240C8FPGA as a control core，consists of peak detector，A/D conversion，program-controlled amplification，compared shaping and phase-shifting network part.The counter measures the frequency，period and phase of sinusoidal signal.With the equal precision method,the multi-function counter achieves the precise frequency measurement of the sinusoidal signal which its frequency is from1Hz to10MHz，its amplitude is from0.01Vrms to5Vrms，as well as the accurate phase measurement of the sinusoidal signal which its frequency is from10Hz to100kHz，its amplitude is from0.5Vrms to5Vrms.The LCD monitor real-time displays the frequency，period and phase difference of current signal.The multi-function counter features high precision，friendly interface，and strong practical.
上传时间： 2013-11-15
上传用户：gy592333
介绍一种多功能音乐播放器，它是以AT89S52单片机为核心，并辅有一些外围器件，采用汇编语言编写程序，实现多功能音乐播放，歌曲自动循环播放和使用琴键自编曲目功能。此外，彩灯显示歌曲节奏，按键跳转到喜爱曲目，液晶显示当前播英文曲目。并给出了系统软硬件设计。 Abstract: It introduces a multifunctional music player,taking AT89S52 single-chip microcomputer as hardware control core and using some peripheral elements.Programmes are compiled in assembly language to act as expected.There are two functional modes in this system.One is to make the music play automatically and consecutively,the other is to compose new songs through keys.In addition,lights show the pace of music and the English names can be displayed in the liquid crystal screen.With perfect combination of hardware and software,the music player can meet many music lovers’needs for multifunctional music player.And the hardware and software of the system are given.
上传时间： 2013-11-18
上传用户：xiaodu1124
