通用寄存器的部分代码 LIBRARY IEEE USE IEEE.STD_LOGIC_1164.ALL ENTITY traffic IS PORT(clk,sm,sb:IN bit mr,my,mg,br,by,bg:OUT bit ) END traffic -part of the general purpose registers IEEE code LIBRARY USE traffic IEEE.STD_LOGIC_1164

MEI SM

This example shows how a Sm component is directly coded in VHDL as concurrent statements. The multiplexor is coded as a single "when" statement. "Sm" is mnemonic for subtractor-multiplexor.

state machine which shows a sm implementation used normally in each modules.

基于xc4vsx25芯片而开发的verilog语言程序，实现按键输入数字密码并显示于数码管上的功能。程序均已通过调试试验，可于SEED-XDTK_V4实验箱上实现。-Verilog language program developed based xc4vsx25 chip key input digital password displayed on the digital tube on the function. Procedures are debugging test in SEED-