esTc 设计中 Structural Modeling e Functionality and structure of the circuit Call out the specific hardware For the purpose of synthesis Higher-level Component INT OUT1 Lower-level Component2 INn Lower-level Component 1 oUTn
设计中心 Structural Modeling • Functionality and structure of the circuit • Call out the specific hardware • For the purpose of synthesis Lower-level Component1 Lower-level Component2 IN1 INn OUT1 OUTn Higher-level Component
RTL SYnthesis Process(a, b, c, d, sel) begin inferred abcd mux out case(sel)is When 00"=>mux out <= a when"0”=> mux out<=b; sel when“10”=> mux out<=c; When“11”=> mux out<=d end case Translation Optimization
esTc 设计中 Model Referencing of Library/Package
设计中心 Model Referencing of Library/Package
esTc 设计中 VHDL Operators Operator Type Operator Name/Symbol Logical and or nand nor xor xnor(93 E Relational <<=>> Adding -8 Signing Multiplying x mod rem Miscellaneous abs not
设计中心 VHDL Operators Operator Type Operator Name/Symbol Logical and or nand nor xor xnor(93) Relational = /= < <= > >= Adding + - & Signing + - Multiplying * / mod rem Miscellaneous ** abs not
esTc 设计中 VHDL Operators Vhdl defines arithmetic boolean functions only for built-in data types ( defined in Standard package) Arithmetic operators such as +, <, > <= >5 are defined only for INTEGER type Boolean operators such as AND, OR, NOt are defined only for BIT type
设计中心 VHDL Operators • VHDL defines Arithmetic & Boolean functions only for built-in data types (defined in Standard package) – Arithmetic operators such as +, -, <, >, <=, >= are defined only for INTEGER type. – Boolean operators such as AND, OR, NOT are defined only for BIT type