Subversion Repositories System09

LIBRARY ieee;

USE ieee.std_logic_1164.all;

LIBRARY altera_mf;

USE altera_mf.all;

ENTITY sprom IS

        GENERIC

        (

                INIT_FILE               : string        := "";

                WORD_COUNT              : natural       := 2048;

                ADDR_WIDTH              : natural       := 11;

                DATA_WIDTH              : natural       := 8;

                REG_OUT                 : string        := "UNREGISTERED"

        );

        PORT

        (

                clk                             : IN  STD_LOGIC ;

                addr                    : IN  STD_LOGIC_VECTOR (ADDR_WIDTH-1 DOWNTO 0);

                wren                    : IN  STD_LOGIC ;

                data_in                 : IN  STD_LOGIC_VECTOR (DATA_WIDTH-1 DOWNTO 0);

                data_out                : OUT STD_LOGIC_VECTOR (DATA_WIDTH-1 DOWNTO 0)

        );

END sprom;

ARCHITECTURE SYN OF sprom IS

        COMPONENT altsyncram

        GENERIC (

                clock_enable_input_a    : STRING;

                clock_enable_output_a   : STRING;

                init_file                               : STRING;

                intended_device_family  : STRING;

                lpm_hint                                : STRING;

                lpm_type                                : STRING;

                numwords_a                              : NATURAL;

                operation_mode                  : STRING;

                outdata_aclr_a                  : STRING;

                outdata_reg_a                   : STRING;

                power_up_uninitialized  : STRING;

                widthad_a                               : NATURAL;

                width_a                                 : NATURAL;

                width_byteena_a                 : NATURAL

        );

        PORT (

                clock0          : IN  STD_LOGIC ;

                wren_a          : IN  STD_LOGIC ;

                address_a       : IN  STD_LOGIC_VECTOR (ADDR_WIDTH-1 DOWNTO 0);

                data_a          : IN  STD_LOGIC_VECTOR (DATA_WIDTH-1 DOWNTO 0);

                q_a                     : OUT STD_LOGIC_VECTOR (DATA_WIDTH-1 DOWNTO 0)

        );

        END COMPONENT;

BEGIN

        wren <= cs and not rw;

        altsyncram_component : altsyncram

        GENERIC MAP (

                clock_enable_input_a    => "BYPASS",

                clock_enable_output_a   => "BYPASS",

                init_file                               => INIT_FILE,

                intended_device_family  => "Cyclone II",

                lpm_hint                                => "ENABLE_RUNTIME_MOD=NO",

                lpm_type                                => "altsyncram",

                numwords_a                              => WORD_COUNT,

                operation_mode                  => "ROM",

                outdata_aclr_a                  => "NONE",

                outdata_reg_a                   => REG_OUT,

                power_up_uninitialized  => "FALSE",

                widthad_a                               => ADDR_WIDTH,

                width_a                                 => DATA_WIDTH,

                width_byteena_a                 => 1

        )

        PORT MAP (

                wren_a          => wren,

                clock0          => clk,

                address_a       => addr,

                data_a          => data_in,

                q_a             => data_out

        );

END SYN;