TM7711 是应用于电子秤低频测量的单通道模拟前端。 该器件可以接受直接来自传感器的低电平的
输入信号，然后产生串行的数字输出。利用 Σ-Δ 转换技术实现了 24 位无丢失代码性能。通过选定的输
入信号被送到一个基于模拟调制器的增益可编程专用前端。 片内数字滤波器处理调制器的输出信号， 通
过通信口发命令可调节滤波器的截止点和输出更新速率，从而对数字滤波器的第一个陷波进行编程。
TM7711 只需 2.6~5.5V 单电源供电。TM7711 是全差分模拟输入，带有一个基准输入。
TM7711 是一款用于高精度电子秤系统的理想产品，由于采用特殊的结构确保器件具有极低功耗，
并且内建有掉电模式以减少待机功耗。该芯片还具有集成度高、响应速度快、抗干扰强等优点，可以大
大降低电子秤系统的整机成本，提高整机系统的性能和可靠性。
TM7711 is used in electronic scales measuring the low-frequency single-channel analog front-end. The device can accept a low level directly the sensor
Input signal, and then generates a serial digital output. Use Σ-Δ converter technology to achieve 24-bit no missing code performance. Via the selected output
The signal is fed to an analog modulator based on a dedicated front-end programmable gain. Chip digital filter processing modulator output signal through
Send commands over the communication port can adjust the filter cutoff and output update rate, and thus the first notch digital filter can be programmed.
TM7711 only 2.6 ~ 5.5V single power supply. TM7711 is a fully differential analog input with a reference input.
TM7711 is an ideal product for high-precision electronic scale systems, the use of a special structure to ensure that the device has a very low power consumption,
And built-in power-down mode to reduce standby power consumption. The chip also features high integra (2015-01-21, PDF, 346KB, 下载57次)
TDC-GP22 为TDC-GP21的下一代升级产品.这颗芯片是与TDC-GP21芯片100 管脚和功能兼容的芯片,而且带有更
强大的功能. 尤其这颗芯片的最新第一波检测功能,将使TDC-GP22非常适合于高动态范围的超声波水表的应
用.可编程的比较器offset调整范围增加到了 ± 35 mV ,而且这个比较器offset将会在第一波检测后自动回
到0点比较.测量第一个回波脉冲的相对宽度将会给用户一个对于接收信号强度的提示.通过这个提示信息可以
用于系统的长期覆盖物的信号减弱判断,以及用于气泡检测.多个测量脉冲的数据处理和数据读出功能将会比
TDC-GP21更加简单方便.
The next generation TDC-GP22 TDC-GP21 upgrade products. This chip is pin and function compatible chip and the TDC-GP21 chip 100 tube, and with more
Powerful functions. This chip detection function especially the latest first, will make the TDC-GP22 ultrasonic water meter is very suitable for high dynamic range should be
. comparator offset programmable adjustment range increased to 35 mV, and the comparator offset will automatically back in the first wave detection
To 0 points of comparison. Measure the first echo pulse relative width will give the user a for received signal strength by the prompt information can prompt.
A signal for long term covering system weakened judgment, as well as for bubble detection. A plurality of pulse measurement data processing and data read function will be greater than
TDC-GP21 is more simple and convenient. (2014-10-30, PDF, 5745KB, 下载49次)
AD7799/AD7798
特性：
RMS 噪声（有效值噪声）：
在 4.13HZ 转换率下紧为 27nV(AD7799).
在 16.7HZ 转换率下为 65Nv.
· 低 功 耗 ，典型为 300uA
· 内 置 1 一 128 增益的低噪声可编程仪表放大器
· 内 置 时 钟振荡器，省去了外接晶振
· 低 非 线 性度:0.0015
· 内 设 自 校准电路
· 带 有 SPI 数据接口，可以方便地与 DPS 或者 MCU 连接 · 50 H
z 和 06Hz 同步陷波，消除 05Hz 和 06Hz 电源干扰 · 可 配 置 3
个差分输人通道
· 21 位 有 效分辨率(PGA=1)，19BIST (PGA=128
工作电源范围 2.7V----5.5V，-40 ° C 至 105 ° C 的温度范围，独立供电接口； 16 脚
的 TSSOP 封装。
应用
电子磅秤
压力测量
应变传感器
血气分析
工业过程控制
仪器仪表
便携式仪表
血液分析
智能
AD7799/AD7798 features: RMS noise (rms noise): in 4.13HZ conversion rates under tight 27nV (AD7799). In 16.7HZ conversion rate for 65Nv. Low power consumption, typical 300uA built-in 1 128 gain low-noise programmable instrumentation amplifier built-in clock oscillator, eliminating the need for an external crystal oscillator Low Nonlinearity: 0.0015 equipped with self-calibration circuitry with SPI data interface, you can easily and DPS or MCU connection 50 H z and 06Hz synchronization notch to eliminate 05Hz and 06Hz power interference 3 differential input channels can be configured 21 effective resolution (PGA = 1), 19BIST (PGA = 128 working power range 2.7V---- 5.5V, a temperature range of-40 C to 105 C, independent power supply interface 16-pin TSSOP package. electronic scales pressure measuring strain sensor blood gas analysis, industrial process control instrumentation portable instrument blood analytic intelligence (2013-03-29, PDF, 596KB, 下载18次)
高速 D／ A转换器的动态参数测试方法进行了理论分析和测试实践。通过编程， 由逻辑分析仪给 D ／ A转换器提供单一频率的数字正弦波和时钟信号；通过频谱分析仪， 对 D／ A转换器输出模拟信号采样， 进行快速傅里叶变， 分析得到 D／ A转换器
的动态参数特性。实验证明， 该方法能快速测试高速 D ／ A转换器的动态参数， 在 实际应用中可获
得 良好的效果。
Us i n g l o g i c a n a l y z e r a n d s p e c t r o me t e r ，t h e o r e t i c a l a n a l y s i s a n d e x p e r i me n t s a r e e on d u c t e d t o s t u d y t h e t e c h —
n i q u e f o r t e s t i n g d y n a mi c p a r a me t e r s o f h i g h- s p e e d D ／ A c o n v e r t e r s ． Th e l o g i c a n a l y z e r p r o v i d e s d i g i t a l s i n e w a v e s w i t h s i n —
g l e f r e q u e n c y f or t h e D／ A c o n v e r t e r ．n e s p e c t r ome t e r s a mp l e s o u t p u t a n a l o g s i g n a l s o f t h e D／ A c o n v e r t e r a nd i mp l e me n t s
F Frt o o b t a i nd y n a mi c p a r a me t e r s ．Th e e x p e r i me n t d e m o n s t r a t e s t h a tt h i s me t h o di s af a s twa yt ot e st d y n a mi c p a r a me t e r s
o f h ig h- s p e e d D／ A c o n v e r t e r s ，a n d g o o d r e su l t s c a n b e a c h ie v e d i n a c (2012-10-17, PDF, 155KB, 下载5次)
PCL6045B运动控制芯片，由NPM公司生产，是一种通过总线接收CPU命令、并产生脉冲控制步进电机或脉冲驱动型伺服电机的CMOS大规模集成芯片，可提供多种输出运动控制功能，包括连续、定长、回原点等输出方式，采用176针QFP封装，5V±10％和3.3V±10％双电源供电，工作温度范围－40℃～70℃。芯片功能丰富、硬件接口和软件编程简单、集成度和可*性高，可以广泛应用于数控机床、纺织机械、印刷机械、包装机械、各类切割机、雕刻机、机器人等数控机械的运动控制中。
PCL6045B motion control chip, produced by the NPM, is a CPU command received via the bus, and produce large-scale integration of CMOS chip stepper motor or pulse-driven servo motor pulse control, can provide a variety of output motion control functions, including continuousfixed-length output back to the origin using the 176-pin QFP package, 5V ± 10 and 3.3V ± 10 of dual power supply, operating temperature range-40 ℃ ~ 70 ℃. The chips feature-rich, simple hardware interface and software programming, integration and can be*, can be widely used in the sport of the CNC machine tools, textile machinery, printing machinery, packaging machinery, all kinds of cutting machines, engraving machines, robots and other CNC machinery control
(2012-03-13, PDF, 8399KB, 下载132次)
本设计采用AT89S52单片机控制，利用GX12232液晶屏进行显示电子万年历以及显示DS18B20对周围温度的实时监测的结果。本文详细介绍了系统硬件工作原理，介绍了本设计所应用的各硬件接口技术和各个接口模块功能及工作过程，论证了设计方案理论的可行性，然后通过软件仿真、硬件调试证实了方案的论证。在编程上以单片机C语言进行软件设计仿真，充分利用C语言的优越性，增加了程序的可读性和移植性，为了便于更改和扩展，软件的设计采用模块化设计结构，使程序设计的逻辑关系更加简洁明了。在硬件设计上添加键盘操作，使得人机交换更加方便。
This design uses AT89S52 MCU control, the use of electronic GX12232 LCD screen to display calendar and display DS18B20 real-time monitoring of the ambient temperature results. This paper describes the working principle of the system hardware, introduced the application of this design the hardware interface technology and various interface module functions and work processes, demonstrated the feasibility of the design theory, and then through software simulation and hardware debug the program confirmed the argument . (2011-04-12, PDF, 209KB, 下载2次)
在这里将主要针对单色的点阵液晶屏（LCD）进行介绍，而且是针对 LCD 模块本身就集成有驱动控制 IC 的，以及显存；那些字符型以及段码型的 LCD不在介绍之例，但也可以在一定程序上参考本书的驱动编程方法来编写这些 LCD的驱动程序。 此外， 也有些小规模的 （一般是 3.5 寸以下）彩色 TFT LCD 也有内置驱动控制器以及显存的，也可参考这里的介绍来编写它们的驱动程序。
Here will be focused on monochrome dot-matrix LCD screen (LCD) were introduced, but also for the LCD module itself control IC with integrated drivers, as well as memory that character and pattern of the LCD segment is not in the case of introduction, However, certain procedures can also be driven programming reference book to write the LCD driver. In addition, some small-scale (typically 3.5 inches or less) have built-in color TFT LCD driver controller and memory, and also can be found here in the introduction to the preparation of their drivers. (2010-06-04, PDF, 1146KB, 下载13次)
MSC1210中文资料--内核兼容8051的MSC1210单片机，具有高性能ADC、片内存储器以及Flash编程应用等功能。实际应用系统往往需要进行高精度的测量，同时还必须进行实时快速控制，提高其开发效率。为此人们常采用高精度A/D芯片加带ISP开发功能的单片机系统来实现。德州仪器（TI）的MSC1210单片机解决了上述问题。它集成了一个增强型8051内核、高达33 MHz的时钟周期、8路24位高精度∑-△A/D转换器、Flash存储器等……
MSC1210 Chinese data- 8051 MSC1210 microcontroller core compatible with high-performance ADC, on-chip Flash program memory and application functions. Practical applications often require high-precision measurements, but also the need for real-time fast control, to improve their development efficiency. To do this people often use high-precision A/D chip increases with ISP microcontroller system development function to achieve. Texas Instruments (TI) of the MSC1210 microcontroller to solve the above problems. It integrates an enhanced 8051 core, up to 33 MHz clock cycle, 8-channel 24-bit high-precision Σ-△ A/D converter, Flash memory, and so on ... ... (2009-12-21, PDF, 615KB, 下载28次)
ADuC812是美国AD公司推出的高性能单片机，具有集成度高、资源丰富等特点。
(1) 基于8051的内核，指令系统与8051兼容，额定工作频率12MHz。
(2) 8KB片内闪速/电擦除程序存储器 640B片内闪速/电擦除数据存储器 256B片内数据RAM。
(3) 3个16位的定时器/计数器 32根可编程I/O线 9个中断源，2个优先级。
(4) 1个8通道，高精度12位ADC 2个12位电压输出DAC。
(5) 1个片内温度传感器。
(6) 采用3V、5V电压工作 具有正常、待机和掉电三种工作模式。
(7) 1个通用UART串行I/O 1个与I2C兼容的两线串口和SPI串口 1个看门狗定时器(WDT) 1个电源监视器(PSM)。
ADuC812 is AD Launches the United States, high-performance single-chip, high integration and rich in resources and so on. (1) Based on the 8051 core 8051 compatible instruction set with a rated operating frequency of 12MHz. (2) 8KB-chip Flash/EE program memory 640B-chip Flash/EE data memory 256B-chip data RAM. (3) three 16-bit timer/counter 32 programmable I/O lines 9 interrupt sources, two priority. (4) an 8-channel, high-precision 12-bit ADC 2 12-bit voltage output DAC. (5) a-chip temperature sensor. (6) the use of 3V, 5V voltage with normal, standby and power-down mode of the three. (7) a generic UART serial I/O 1 with I2C-compatible two-wire SPI serial port and serial port a watchdog timer (WDT) 1 power supply monitor (PSM). (2009-02-08, PDF, 679KB, 下载35次)
实用数字万年历设计:该系统的设计电路是以 AT89S52 单片机为核心控制器，其外围电路主要包括时钟模块，键盘模块，液晶模块，
闹钟模块和与PC 机通信模块等。这种电子时钟不仅具有了一般电子时钟的基本功能，并且具有以下功能：闹
钟时间设置，闹钟音乐选择，显示年月日与星期，显示农历，通过PC 机在Internet 上同步时间,与PC 通信时
PC 机上会显示友好界面等一系列功能。整个系统使用单片机C51 语言进行编程，PC 机上的通信界面有VB 编
程，实现其设计的各种功能。
Practical digital calendar design: The system is based on the design of circuits as the core controller AT89S52 Single-chip, and its peripheral circuits include clock module, a keyboard module, LCD module, the alarm module and communication module with PC and other machines. This electronic clock not only has the general basic functions of electronic clock, and has the following functions: setting the alarm time, alarm clock, music selection, show date and week, showing Chinese, through the Internet on the PC-sync in time with the PC communication PC-friendly interface will show a series of functions. The entire system using single-chip microcomputer C51 language programming, PC machine communication interface VB programming, designed to achieve its various functions. (2008-01-04, PDF, 504KB, 下载348次)
SX-CPLD/FPGA 数字逻辑电路设计实验仪
SX-CPLD/FPGA 数字逻辑电路设计实验仪
产品介绍
1.利用CPLD/FPGA 提供的软硬件开发环境学习最新逻辑IC 设计，以取代TTL/CMOS 复杂的硬件设计。
2.可使用电路绘图法、ABEL 语言、波形图和数字硬件描述语言法(VHDL/AHDL)来开发电路。
3.CPLD/ FPGA 提供引脚可任意设定,故作测试实验时不需要做硬件连接,可节省大量连线焊接时间,快速学习软硬件的运用。
4.CPLD/ FPGA 每一I/O Pin 皆有逻辑状态监视器，以便迅速了解每一引脚状态。
5.清楚标示每一管脚的脚位，易于观察和测量。
6.使用并口在开发系统下直接下载。
7.可在线将CPLD/ FPGA 程序到FLASH ROM，实验仪可独立运行，适合大学生EDA 电子竞赛。
8.可做8051 和CPLD/ FPGA 的组合电路实验。
9.适用于WINDOWS95/98/NT/2000/XP 操作系统。
10.数万门的现场可编程芯片让设计所思即所得。
err (2008-01-03, PDF, 167KB, 下载20次)
在现代化的工业生产设备中，有大量的数字量及模拟量的控制装置，例如电机的起停，电磁阀的开闭，产品的计数，
温度、压力、流量的设定与控制等，工业现场中的这些自动控制问题，若采用可编程序控制器( P C ) 来解决自动控制问题已成为
最有效的工具之一，本文叙述P C 控制系统设计时应该注意的问题。
In modern industrial production equipment, there are a large number of digital and analog control devices, such as motor starting stop, solenoid valve opening and closing, product count, temperature, pressure, flow and control settings such as, industrial site automatic control of these problems, the use of programmable logic controller (PC) to solve the automatic control issue has become one of the most effective tool, this article describes the design of PC control system should pay attention to. (2007-08-02, PDF, 29KB, 下载91次)
51单片机C语言的编程技巧
在进行单片机应用系统设计时．汇编语言是一种常用的软件工具。它能直接操作硬件．指令的执行速度快。但其指令繁育统的固有格式受硬件结构的限制很大．且难于编写与调试．同时其可移植性也较差。随着单片机硬件性能的提高．其工作速度越来越快．因此在编写单片机应用系统程序时．更着重于程序本身的编写效率。本文介招的C51交叉编译器就是解决连一问题的利器
51 microcontroller C programming language skills during SCM application system design. Assembly Language is a common software tools. It can directly operate the hardware. Order Execution speed. But their breeding EC Directive format by the inherent structural limitations of hardware great. It is not easy to prepare and debugging. While its portability also poor. With SCM performance of hardware. Their work ever faster. Therefore, in preparing microcontroller applications procedures. More focused on the preparation process itself efficiency. This paper introduces the C51 cross compiler is not even solve the problem of a sharp object (2007-07-08, PDF, 346KB, 下载10次)
Mic roch ip（美国微芯科技公司）近日宣布推出PICDEM Z 2 .4GHz 演示工具包。该工具包支持Zi gBe e 标准协议，用以开发无线
网络控制及监控应用。Microchip 的PICDEM Z 平台通过提供可轻易集成到无线产品上的硬件及免费ZigBee 协议软件堆栈，协助客户更
快地实现ZigBee 设计。此外，Microchip 提供30 多款支持ZigBee 软件堆栈的PIC18 8 位单片机。这些单片机具备以电池供电的ZigBee
应用所需的主要功能，包括纳瓦 (n anoWatt) 功耗管理及自编程闪存程序存储器。
Mic roch ip (USA Micro-technology company), has recently announced the launch of PICDEM Z 2.4 G Hz demo tool kits. The tool kits to support Zi gBe e standard agreement for the development of wireless network control and monitoring applications. Microchip's PICDEM Z platform through the provision can be easily integrated into wireless products and the hardware for free ZigBee protocol software stack, to help customers achieve faster design ZigBee. In addition, Microchip with 30 assorted support the ZigBee software stack eight PIC18 MCU. These microcontroller with a battery-powered ZigBee applications of the main function, including Navarro (n anoWatt) power management and self-programming flash program memory. (2007-05-31, PDF, 99KB, 下载34次)