ProgramCounter.vhd

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-- Company: 
-- Engineer: 
-- 
-- Create Date:    15:56:22 04/21/2016 
-- Design Name: 
-- Module Name:    ProgramCounter - Behavioral 
-- Project Name: 
-- Target Devices: 
-- Tool versions: 
-- Description: 
--
-- Dependencies: 
--
-- Revision: 
-- Revision 0.01 - File Created
-- Additional Comments: 
--
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library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_UNSIGNED.All;

-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
--use IEEE.NUMERIC_STD.ALL;

-- Uncomment the following library declaration if instantiating
-- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;

entity ProgramCounter is
		GENERIC(n:NATURAL );
	PORT (
	I: IN  STD_LOGIC_VECTOR (n-1 DOWNTO 0);
	CLK, LOD, CLR: IN STD_LOGIC;
	O: OUT  STD_LOGIC_VECTOR (n-1 DOWNTO 0));
END ProgramCounter;

ARCHITECTURE Behavioral OF ProgramCounter IS
	SIGNAL temp: STD_LOGIC_VECTOR (n-1 DOWNTO 0) := (others => '0');
BEGIN
	PROCESS(clk)
	BEGIN
	IF(CLK'event AND CLK='1')THEN
		IF(LOD ='1') THEN
			temp <= I;
		--ELSIF (INC='1')THEN
		--	temp <= temp +1;
		ELSIF(CLR='1') THEN
			temp <=(others =>'0');
		END IF;
	END IF;
	END PROCESS;
	O <= temp;
END Behavioral;