-- Block RAM with Resettable Data Output
-- File: rams_sp_rf_rst.vhd
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity rams_sp_rf_rst is
port(
clk : in std_logic;
en : in std_logic;
we : in std_logic;
rst : in std_logic;
addr : in std_logic_vector(9 downto 0);
di : in std_logic_vector(15 downto 0);
do : out std_logic_vector(15 downto 0)
);
end rams_sp_rf_rst;
architecture syn of rams_sp_rf_rst is
type ram_type is array (1023 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 en = '1' then -- optional enable
if we = '1' then -- write enable
ram(to_integer(unsigned(addr))) <= di;
end if;
if rst = '1' then -- optional reset
do <= (others => '0');
else
do <= ram(to_integer(unsigned(addr)));
end if;
end if;
end if;
end process;
end syn;