VHDL教学的经典之作，大家学习必看的书籍。

用zynq实现片内的数模转换，基于最新的zynq平台(zynq xadc on FPGA arm)

自动打铃系统 附带时钟 定时打铃 整点打铃-Auto-play Ling System

同步串行数据发送电路SSDT的基本功能是将并行数据转换成串行数据并进行同步发送。系统写入和读出时序完全兼容Intel8086时序。 系统以同步信号开始连续发送四个字节，在发送中出现5个1时插入一个0，在四个数据发送结束而下一次同步没有开始之前，发送7FH，这时中间不需要插入零 -synchronous serial data transmission circuit SSDT the basic function is to convert parallel data into serial and the same this step. System write and read sequential fully compatible Intel8086 timing. Synchronized signal system to start sending four consecutive bytes, in this emerging 5 1:00 insert a 0, at the end of four data sent and the next synchronization not started before, sending seven FH, then the middle is not inserted

4位ALU,有两个4位输入，4位输出实现逻辑运算和算术运算，逻辑与或非，加1，减1等等功能(4 ALU, logical and arithmetic operations)

说明：  DOCUMENT ON DISTRIBUTED ARITHMATIC

Real time Clock DS1307 interacing with PIC using I2C.

传感器是一种检测装置，能感受到被测量的信息，并能将感受到的信息，按一定规律变换成为电信号或其他所需形式的信息输出，以满足信息的传输、处理、存储、显示、记录和控制等要求(Sensor is a kind of detection device, which can sense the measured information and transform it into electrical signal or other required information output according to certain rules to meet the requirements of information transmission, processing, storage, display, recording and control.)

同步FIFO功能，verilog语言描述，通过了modelsim 6.0 仿真，Quartue综合-Synchronous FIFO function, verilog language described by the modelsim 6.0 simulation, Quartue integrated

Multiplexer styles in VHDL

用vhdl实现24小时计数器，方法简单实用。 仿真环境MAXPLUS--use VHDL to achieve 24-hour counter, simple and practical method. Simulation environment Segments-