说明：  华为,大规模逻辑设计指导书,规格详细，包括：VHDL编写规范，Verilog编写规范，asic设计方法，同步电路设计规则，vhdl电路设计，代码可重用设计，
(Huawei, a large-scale logic design guide books, detailed specifications, including: VHDL specification preparation, Verilog specification preparation, asic design, synchronous circuit design rules, vhdl circuit design, reusable code design,)