Single-Port RAM with Asynchronous Read Coding Example (VHDL) - 2023.1 English

Filename: rams_dist.vhd

-- Single-Port RAM with Asynchronous Read (Distributed RAM)
-- File: rams_dist.vhd

library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

entity rams_dist is
port(
clk : in std_logic;
we : in std_logic;
a : in std_logic_vector(5 downto 0);
di : in std_logic_vector(15 downto 0);
do : out std_logic_vector(15 downto 0)
);
end rams_dist;

architecture syn of rams_dist is
type ram_type is array (63 downto 0) of std_logic_vector(15 downto 0);
signal RAM : ram_type;
begin
process(clk)
begin
if (clk'event and clk = '1') then
if (we = '1') then
RAM(to_integer(unsigned(a))) <= di;
end if;
end if;
end process;

do <= RAM(to_integer(unsigned(a)));

end syn;