VHDL进阶，在VHDL初步的基础上，使读者进一步深入了解VHDL语言现象和语句规划的特点，以及应用VHDL表达与设计电路的方法。-Advanced VHDL in VHDL preliminary basis, so that readers further insight into the phenomenon of VHDL language and expressions of the characteristics of planning, as well as the express