-- Block RAM with Optional Output Registers
-- File: rams_pipeline.vhd
library IEEE;
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
entity rams_pipeline is
port(
clk1, clk2 : in std_logic;
we, en1, en2 : in std_logic;
addr1 : in std_logic_vector(9 downto 0);
addr2 : in std_logic_vector(9 downto 0);
di : in std_logic_vector(15 downto 0);
res1 : out std_logic_vector(15 downto 0);
res2 : out std_logic_vector(15 downto 0)
);
end rams_pipeline;
architecture beh of rams_pipeline is
type ram_type is array (1023 downto 0) of std_logic_vector(15 downto 0);
signal ram : ram_type;
signal do1 : std_logic_vector(15 downto 0);
signal do2 : std_logic_vector(15 downto 0);
begin
process(clk1)
begin
if rising_edge(clk1) then
if we = '1' then
ram(to_integer(unsigned(addr1))) <= di;
end if;
do1 <= ram(to_integer(unsigned(addr1)));
end if;
end process;
process(clk2)
begin
if rising_edge(clk2) then
do2 <= ram(to_integer(unsigned(addr2)));
end if;
end process;
process(clk1)
begin
if rising_edge(clk1) then
if en1 = '1' then
res1 <= do1;
end if;
end if;
end process;
process(clk2)
begin
if rising_edge(clk2) then
if en2 = '1' then
res2 <= do2;
end if;
end if;
end process;
end beh;