在赋值类语句中,经常引用函数来表达常用的运算; function 的结构主要由参量表、说明部分和顺序执行部分构 成,具体结构形式如下 P.276 表 4-35: function function-name ( signal-list) return return-type is declarations and definitions;
Process Statement All the Process Statement is executed in parallel Within the Process Statement, the coding is execute in sequential Process Statement is : OUTPUT depends on INPUT with Sensitivity List to control the event happen