I am not a VHDL expert but I believe that the less than ">" operator has been used to compare two type of value: std_logic_vector and
OperatorOperation = /= < <= > >= equal not equal less than less than or equal greater than greater than or equal The expression for signal assignment and less than or equal are the same. They are distinguished by the usage context. Essential VHDL for ASICs 85 CASE Statement Controls ...
If an operand is a constant, less logic will be generated. If both operands are constants, the logic can be collapsed during compilation, and the cost of the operator is zero gates. Using constants (or more generally metalogic expressions) wherever possible means that the design description ...
Unary reduction operator is present. It is more difficult to learn. It is easy to learn.History of VHDL VHDL was developed by the Department of Defence (DOD) in 1980. 1980: The Department of Defence wanted to make circuit design self-documenting. 1983: The development of VHDL began with ...
Logical Operators andLogical AndorLogical OrnandLogical NandnorLogical NorxorLogical XorxnorLogical Xnor Relational Operators =Equal/=Not Equal<Less Than<=Less Than or Equal To>Greater Than>=Greater Than or Equal To Concatenation Operator &Concatenate...
Logical Operators andLogical AndorLogical OrnandLogical NandnorLogical NorxorLogical XorxnorLogical Xnor Relational Operators =Equal/=Not Equal<Less Than<=Less Than or Equal To>Greater Than>=Greater Than or Equal To Concatenation Operator &Concatenate...
VHDL Synthesis Reference Summary This comp ensive reference provides detailed information with respect to synthesis of VHDL code. It also contains an overview section regarding the syntax of the VHDL Technical Reference Language. TR0115 (v2.0) March 04, 2008 VHDL is a hardware description language ...
Smaller than or equal scalar or discrete array types Boolean > Greater than scalar or discrete array types Boolean >= Greater than or equal scalar or discrete array types Boolean Notice that symbol of the operator “<=” (smaller or equal to) is the same one as the assignmen...
--Theminusoperator-isoverloadedbythispackage,therebyallowinganintegertobesubractedfromastd_logic_vector. --dowloadfrom: LIBRARYieee; USEieee.std_logic_1164.ALL; USEieee.std_logic_unsigned.ALL; ENTITYpldcntr8IS PORT(clk,load:INStd_logic; datain:INStd_logic_vector(7DOWNTO0);q:OUTStd_logic_vect...
Therefore this style is especially important for VHDL coders. All signals declared with r_ should have initial conditions. All signals declared with w_ should never appear to the left hand side of an assignment operator in a sequential process (in VHDL) or a clocked always block (in Verilog)...