Visible to Intel only — GUID: dgd1700067252285
Ixiasoft
Visible to Intel only — GUID: dgd1700067252285
Ixiasoft
6.3.7. Application Packet Receive Interface (st_rx)
Signal Name | Direction | Clock Domain | Description |
---|---|---|---|
ss_app_st_rx_tvalid | Output | axi_st_clk | ss_app_st_rx_tvalid indicates that the source is driving a valid transfer. |
app_ss_st_rx_tready | Input | axi_st_clk | app_ss_st_rx_tready indicates that the sink can accept a transfer in the current cycle readyLatency parameter defined in Avalon spec shall be supported. By default, the value is '0'. |
ss_app_st_rx_tdata[(DWIDTH_SEG*NUM_OF_SEG)-1:0] | Output | axi_st_clk | Data interface with configurable width specified by the DWIDTH_SEG*NUM_OF_SEG parameter. Default DWIDTH = DWIDTH_SEG*NUM_OF_SEG = 1024 tdata carries only the payload. |
ss_app_st_rx_tkeep[((DWIDTH_SEG/8)*NUM_OF_SEG)-1:0] | Output | axi_st_clk | A byte qualifier used to indicate whether the content of the associated byte is valid. The invalid bytes are allowed only during the ss_app_st_tx_tlast cycle. |
ss_app_st_rx_tlast | Output | axi_st_clk | Indicates End of Data/Command Transmission. tlast may seem redundant with the tuser.last_segment. However, tlast can be used by the front-end layer of the AXI BFM/routing fabric that does not deal with the decoding of the multipacket data. |
ss_app_st_rx_tuser_last_segment[NUM_OF_SEG-1:0] | Output | axi_st_clk | Indicates Packet End position on tdata bus. Only applicable with Variable Header Position and Compact Packing scheme.
Note: Variable and compact packing not currently supported.
|
ss_app_st_rx_tuser_vendor[NUM_OF_SEG-1:0] | Output | axi_st_clk | Vendor Specific Tuser bits. Indicates Header Format. Is a don't-care in Power User mode. [0] - Indicates Header format of First packet in a cycle [1] - Indicates Header format of Second packet in a cycle |
ss_app_st_rx_tuser_hvalid[NUM_OF_SEG-1:0] | Output | axi_st_clk | Indicates the ss_app_st_rx_tuser_hdr and ss_app_st_rx_tuser_vendor bits are valid in the respective segment. |
ss_app_st_rx_tuser_hdr[NUM_OF_SEG*256-1:0] | Output | axi_st_clk | If tuser_vendor = 0, tuser_hdr carries the Power User Mode header format for the respective segment. If tuser_vendor = 1, tuser_dr carries the header format for the respective segment. |
Refer to the section Data and Header Packing Schemes for timing diagrams in each of the modes when using the Application Packet Receive Interface.