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[SCM] aduc812 DL : 0: 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).
Date : 2026-01-14 Size : 679kb User : 白涛
[SCM] frequency DL : 0: 利用51定时器实现高精度频率测量，数码管显示，汇编语言-51 timer using high precision frequency measurement, digital display, assembly language
Date : 2026-01-14 Size : 72kb User : lihua
[SCM] 89C51PWM DL : 0: 51系列单片机无PWM输出功能，可以采用定时器配合软件的方法输出。对精度要求不高的场合，非常实用。电路图见图一，采用了高速光隔（6N137）输出，并将PWM的信号倒相。 -51 series microcontroller no PWM output function, can be used with the method of software timer output. On the occasion of the precision requirement is not high, very practical. See chart a circuit diagram, using high light every (6 N137) output, and the signal pour phase PWM.
Date : 2026-01-14 Size : 37kb User : wohjp
[SCM] AutoSelectScale-Cymometer DL : 0: 1. 测量方式可以随被测信号的频率变化自动进行切换，>1000Hz时，定时计数方式；<900Hz时，测周期,切换点可以随时自定义，可以做到最佳的匹配。 2. 可以通过改变晶振或者单片机来提高测量范围，有四个常用晶振的宏选择 3. 精度高，通过软件修正、再配合高频晶振以及更换单周期指令的单片机，高频时，可以做到+-2Hz的误差。-1. A measurement with the measured signal frequency changes automatically switch,> 1000Hz, the timer count the ways <900Hz, the measurement cycle, the switching point can be custom You can be the best match. 2. Can change the crystal or single-chip to improve the measurement range, there are four commonly used crystal macro select 3. High precision, coupled with the high-frequency crystal oscillator and the replacement of single-cycle instruction microcontroller software correction, the high frequencies, can be done+- 2Hz error....
Date : 2026-01-14 Size : 55kb User : 刘凡
[SCM] timer DL : 0: 51单片机实现高精度定时，程序精简实用，请下载。-51 single-chip high-precision timing, streamline procedures and practical, please download.
Date : 2026-01-14 Size : 1kb User : 11223
[SCM] Digital-frequency-meter DL : 0: 数字频率计作为一种常见的应用电子仪器设备，传统的一般可以完全由硬件电路搭接而成，如采用基于555 定时器电路的多功能数字频率计的设计便是可取的路径之一，不用依靠单片机。但是这种电路存在一些缺点，且测频精度也不如单片机的高。在科学研究和生产实践中，如工业过程控制，生物医学，地震模拟机械振动等领域常常要用到频率计。利用单片机采用程序设计方法来设计频率计，其测频精度高。且线路相对简单，结构紧凑，价格低廉，系统稳定度高，抗干扰能力强，用途广泛等优点-Digital frequency meter is a common application of electronic devices, the traditional general can completely by hardware circuit lap, such as the use of 555 timer circuit based multifunctional digital frequency meter design is the one of the desirable paths without by MCU. But this circuit has some shortcomings, and the accuracy of frequency measurement as well as the MCU high. In the scientific research and production practice, such as industrial process control, biomedicine, seismic modelingmechanical vibration and other fields often use frequency meter. The use of single-chip microcomputer to design frequency meter program design method is adopted, the frequency measurement precision. And the lines are relatively simple, compact structure, low cost, high stability, strong anti-interference ability, wide range of uses, etc.
Date : 2026-01-14 Size : 3.45mb User : 袁丁