2 use ieee.std_logic_1164.all;
3 use ieee.numeric_std.all;
6 -- "synchronous single port RAM
9 ADDR_WIDTH : integer range 1 to integer'high
12 sys_clk : in std_logic;
13 sys_res_n : in std_logic;
14 address : in std_logic_vector(ADDR_WIDTH - 1 downto 0);
21 architecture beh of sp_ram is
22 subtype RAM_ENTRY_TYPE is hbyte;
23 type RAM_TYPE is array (0 to (2 ** ADDR_WIDTH) - 1) of RAM_ENTRY_TYPE;
24 signal ram : RAM_TYPE := (others => x"00");
26 process(sys_clk, sys_res_n)
28 if sys_res_n = '0' then
29 ram <= (others => x"00");
30 elsif rising_edge(sys_clk) then
31 data_out <= ram(to_integer(unsigned(address)));
33 ram(to_integer(unsigned(address))) <= data_in;