MVB Item Collision Resolver

ENTITY MVB_ITEM_COLLISION_RESOLVER IS

The component MVB_ITEM_COLLISION_RESOLVER ensures that only Items with different data are valid at the output in each clock cycle. When the data at the output are the same, they are invalidated (all but one).

The data are stored in a FIFO and await to be read. After each read (TX_DST_RDY=’1’), the logic analyzes the output data anew and recalculates the valid signal (TX_VALID). This mechanism nullifies Item collisions at the cost of lowering the throughput in such cases.

Generics

Generic	Type	Default
ITEM_WIDTH	natural	10
META_WIDTH	natural	10
ITEMS	natural	4
DEVICE	string	“AGILEX”

Ports

Port	Type	Mode
CLK	std_logic	in
RESET	std_logic	in
RX_DATA	slv_array_t (ITEMS-1 downto 0)(ITEM_WIDTH-1 downto 0)	in
RX_META	slv_array_t (ITEMS-1 downto 0)(META_WIDTH-1 downto 0)	in
RX_VALID	std_logic_vector(ITEMS-1 downto 0)	in
RX_SRC_RDY	std_logic	in
RX_DST_RDY	std_logic	out
TX_DATA	slv_array_t (ITEMS-1 downto 0)(ITEM_WIDTH-1 downto 0)	out
TX_META	slv_array_t (ITEMS-1 downto 0)(META_WIDTH-1 downto 0)	out
TX_VALID	std_logic_vector(ITEMS-1 downto 0)	out
TX_SRC_RDY	std_logic	out
TX_DST_RDY	std_logic	in