PoC.fifo.glue

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Its primary use is the decoupling of enable domains in a processing pipeline. Data storage is limited to two words only so as to allow both the ful and the vld indicators to be driven by registers.

Entity Declaration:

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entity fifo_glue is
  generic (
    D_BITS : positive                                -- Data Width
  );
  port (
    -- Control
    clk : in std_logic;                             -- Clock
    rst : in std_logic;                             -- Synchronous Reset
    
    -- Input
    put : in  std_logic;                            -- Put Value
    di  : in  std_logic_vector(D_BITS-1 downto 0);  -- Data Input
    ful : out std_logic;                            -- Full
    
    -- Output
    vld : out std_logic;                            -- Data Available
    do  : out std_logic_vector(D_BITS-1 downto 0);  -- Data Output
    got : in  std_logic                             -- Data Consumed
  );
end entity fifo_glue;