VHDL程序实例集，其主要内容包括：用VHDL设计的组合电路、时序电路、数字综合电路、电路图输入法要领概述、实用VHDL语句等。-VHDL instance set, the main contents include: VHDL design of combinational circuits, sequential circuits, digital integrated circuit schematic input method essentials outlines, practica