VHDl硬件描述语言实现单片机与cpld通信

IC卡操作软件:AT88SCl604芯片的操作模式有五种。它们是通过配PGM、RST、CLK等引脚信号及内部地址计数器(IAC)的状态组合来实现。 (1) 芯片复位操作： AT88SCl604有两种复位方式:上电复位和控制复位。 上电复位： 上电复位是当芯片加电时的最初状态。上电复位属于芯片 内部复位。它将使芯片内部所有的隐含标志复位到"0"状态。并使地址计数器复位到0位。 控制复位： 当CLK为低时，在RST脚上的一个下降沿将便芯片产生复位操作。 控制复位是将地址计数器复位到0位，而不影响任何内部标志的状态。-IC Card operating software : AT88SCl604 chip mode of operation there are five. They are allocated by PGM, RST, etc. pin CLK signal and the internal address counter (IAC) portfolio of the state is to be achieved. (1) chip reset operation : reduction AT88SCl604 two ways : power-on reset and reset control. Power-on reset : power-on reset when the chip is in power at the initial state. Power-on reset the internal chip is reset. It will enable all internal chip implied signs reset to "0" state. Make address counter reset to 0. Reset control : When the CLK for the low, the RST feet of a falling edge chips will have to reset operation. Reset control is to address counter reset to 0, without prejudice to any signs of internal sta

由VHDL 语言实现的AD0809用的是KEIL环境已经得到验证-By the VHDL language used in the AD0809 is KEIL environment has been tested

本文作者采用AT89C2051单片机和温度传感器DS18B20从硬件和软件两方面介绍了一款简易数字温度计的设计过程，  并对硬件原理图和程序流程图作了简洁的描述。数字温度计与传统的温度计相比，具有读数方便，测温范围广，测温准确，其输出温度采用数字显示，主要用于对测温比较准确的场所。-The author of this article using AT89C2051 MCU and temperature sensor DS18B20 from both hardware and software, introduced a simple digital thermometer of the design process, and schematic diagram of hardware and procedures were concise description of flow chart. Digital thermometer with a traditional thermometer, compared with a reading of convenience, a wide range of temperature measurement, temperature measurement accuracy, the output of the temperature digital display, mainly used for more accurate temperature measurement sites.

基于Xilinx Spartan系列开发板的DDR SDRAM设计方案及经验总结!-Based on the Xilinx Spartan family of development boards and the DDR SDRAM design experience!

PIC16F877A动态数码管扫描C程序-PIC shumaguan

AD0809 在51 单片机中的应用.pdf-AD0809 in 51 MCU. Pdf

用于事时监控着发大器的工作进程，如果发现错误，立即发出警告。-matter for the control coupled with the process, if the error is found, immediately issued a warning.

cpu采用扫描方式进行按键查询，按键扫描程序-cpu manner by scanning button inquiries button scanner

用89S52进行DS1820温度读取程序-89S52 used for DS1820 temperature reader

c8051f120占空比PWM转速单闭环控制直流电机-c8051f120 PWM duty cycle speed single-loop DC motor control