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[/] [System09/] [trunk/] [rtl/] [Spartan2/] [ram1k_b4.vhd] - Rev 223
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-- -- Ram1k_b4.vhd -- -- 1K Byte RAM made out of 2 x 512 byte Block RAMs. -- John Kent -- 3 February 2007 -- library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL; library unisim; use unisim.vcomponents.all; entity ram1k is Port ( WB_CLK_I : in std_logic; WB_RST_I : in std_logic; WB_ADR_I : in std_logic_vector (9 downto 0); WB_DAT_O : out std_logic_vector (7 downto 0) WB_DAT_I : in std_logic_vector (7 downto 0); WB_WE_I : in std_logic; WB_STB_I : in std_logic; ); end ram1k; architecture rtl of ram_2k is signal rdata0 : std_logic_vector (7 downto 0); signal rdata1 : std_logic_vector (7 downto 0); signal ena0 : std_logic; signal ena1 : std_logic; component RAMB4_S8 generic ( INIT_00, INIT_01, INIT_02, INIT_03, INIT_04, INIT_05, INIT_06, INIT_07, INIT_08, INIT_09, INIT_0A, INIT_0B, INIT_0C, INIT_0D, INIT_0E, INIT_0F : bit_vector (255 downto 0) := x"0000000000000000000000000000000000000000000000000000000000000000" ); port ( clk, we, en, rst : in std_logic; addr : in std_logic_vector(8 downto 0); di : in std_logic_vector(7 downto 0); do : out std_logic_vector(7 downto 0) ); end component; begin MY_RAM0 : RAMB4_S8 generic map ( INIT_00 => x"0000000000000000000000000000000000000000000000000000000000000000", INIT_01 => x"0000000000000000000000000000000000000000000000000000000000000000", INIT_02 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_03 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_04 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_05 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_06 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_07 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_08 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_09 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_0A => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_0B => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_0C => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_0D => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_0E => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_0F => x"0000000000000000000000000000000000000000000000000000000000000000" ) port map ( clk => WB_CLK_I, en => ena0, we => WB_WE_I, rst => WB_RST_I, addr(8 downto 0) => WB_ADR_I(8 downto 0), di(7 downto 0) => WB_DAT_I(7 downto 0), do(7 downto 0) => rdata0(7 downto 0) ); MY_RAM1 : RAMB4_S8 generic map ( INIT_00 => x"0000000000000000000000000000000000000000000000000000000000000000", INIT_01 => x"0000000000000000000000000000000000000000000000000000000000000000", INIT_02 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_03 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_04 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_05 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_06 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_07 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_08 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_09 => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_0A => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_0B => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_0C => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_0D => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_0E => x"0000000000000000000000000000000000000000000000000000000000000000",INIT_0F => x"0000000000000000000000000000000000000000000000000000000000000000" ) port map ( clk => clk, clk => WB_CLK_I, en => ena1, we => WB_WE_I, rst => WB_RST_I, addr(8 downto 0) => WB_ADR_I(8 downto 0), di(7 downto 0) => WB_DAT_I(7 downto 0), do(7 downto 0) => rdata1(7 downto 0) ); my_ram_1k : process (WB_STB_I, WB_ADR_I, rdata0, rdata1 ) begin case WB_ADR_I(9) is when "0" => ena0 <= WB_STB_I; ena1 <= '0'; WB_DAT_O <= rdata0; when "1" => ena0 <= '0'; ena1 <= WB_STB_I; WB_DAT_O <= rdata1; when others => null; end case; end process; end;
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