repo2/common/romgen/rom_example @ 967
| 1 | markw | --
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--ROMsUsingBlockRAMResources.
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--VHDLcodeforaROMwithregisteredoutput(template2)
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--
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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_unsigned.all;
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entity rams_21b is
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port(
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clk:instd_logic;
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en:instd_logic;
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addr:instd_logic_vector(5 downto 0);
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data:outstd_logic_vector(19 downto 0)
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);
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end rams_21b;
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architecture syn of rams_21b is
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type rom_type is array(63 downto 0) of std_logic_vector(19 downto 0);
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signal ROM:rom_type:=
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(
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X"0200A",X"00300",X"08101",X"04000",X"08601",X"0233A", X"00300",X"08602",X"02310",X"0203B",X"08300",X"04002", X"08201",X"00500",X"04001",X"02500",X"00340",X"00241", X"04002",X"08300",X"08201",X"00500",X"08101",X"00602", X"04003",X"0241E",X"00301",X"00102",X"02122",X"02021", X"00301",X"00102",X"02222",X"04001",X"00342",X"0232B", X"00900",X"00302",X"00102",X"04002",X"00900",X"08201", X"02023",X"00303",X"02433",X"00301",X"04004",X"00301", X"00102",X"02137",X"02036",X"00301",X"00102",X"02237", X"04004",X"00304",X"04040",X"02500",X"02500",X"02500", X"0030D",X"02341",X"08201",X"0400D"
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);
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signal rdata:std_logic_vector(19 downto 0);
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begin
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rdata<=ROM(conv_integer(addr));
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process(clk)
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begin
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if(clk’eventandclk=’1’)then
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if(en=’1’)then
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data<=rdata;
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endif;
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endif;
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endprocess;
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end syn;
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