MFB FRAME TRIMMER
- ENTITY MFB_FRAME_TRIMMER IS
The MFB_FRAME_TRIMMER component allows shortening of MFB frames to a selected length. The current implementation is minimalist and does not allow any data shifts. Therefore, there are few restrictions for the new frame length: - max value is original frame length - min value is ((BLOCK_SIZE*ITEM_WIDTH)-(ITEM_WIDTH-1))
Generics
PortsGeneric
Type
Default
Description
REGIONS
natural
4
REGION_SIZE
natural
8
BLOCK_SIZE
natural
8
ITEM_WIDTH
natural
8
META_WIDTH
natural
8
LEN_WIDTH
natural
14
DEVICE
string
“AGILEX”
Port
Type
Mode
Description
CLK
std_logic
in
RESET
std_logic
in
RX_TRIM_EN
std_logic_vector(REGIONS-1 downto 0)
in
Enable frame trimming, valid with RX_SOF.
RX_TRIM_LEN
std_logic_vector(REGIONS*LEN_WIDTH-1 downto 0)
in
New frame length after trimming in ITEMS, max value is original frame length, min value is ((BLOCK_SIZE*ITEM_WIDTH)-(ITEM_WIDTH-1)). The new length is valid with RX_TRIM_EN.
RX_DATA
std_logic_vector(REGIONS*REGION_SIZE*BLOCK_SIZE*ITEM_WIDTH-1 downto 0)
in
RX_META
std_logic_vector(REGIONS*META_WIDTH-1 downto 0)
in
User metadata valid with RX_SOF.
RX_SOF_POS
std_logic_vector(REGIONS*max(1,log2(REGION_SIZE))-1 downto 0)
in
RX_EOF_POS
std_logic_vector(REGIONS*max(1,log2(REGION_SIZE*BLOCK_SIZE))-1 downto 0)
in
RX_SOF
std_logic_vector(REGIONS-1 downto 0)
in
RX_EOF
std_logic_vector(REGIONS-1 downto 0)
in
RX_SRC_RDY
std_logic
in
RX_DST_RDY
std_logic
out
TX_DATA
std_logic_vector(REGIONS*REGION_SIZE*BLOCK_SIZE*ITEM_WIDTH-1 downto 0)
out
TX_META
std_logic_vector(REGIONS*META_WIDTH-1 downto 0)
out
User metadata valid with TX_SOF.
TX_SOF_POS
std_logic_vector(REGIONS*max(1,log2(REGION_SIZE))-1 downto 0)
out
TX_EOF_POS
std_logic_vector(REGIONS*max(1,log2(REGION_SIZE*BLOCK_SIZE))-1 downto 0)
out
TX_SOF
std_logic_vector(REGIONS-1 downto 0)
out
TX_EOF
std_logic_vector(REGIONS-1 downto 0)
out
TX_SRC_RDY
std_logic
out
TX_DST_RDY
std_logic
in