Visible to Intel only — GUID: mxa1704169249899
Ixiasoft
Visible to Intel only — GUID: mxa1704169249899
Ixiasoft
6.2. RX MAC Interface to User Logic
Signal |
Direction |
Width |
Description |
---|---|---|---|
clk_rxmac | Output | 1 | Clock for the RX MAC. Generated from the incoming data and is an output from the core (312.5 MHz). |
l2_rx_data | Output | 128 | Data output from the MAC. Bit 127 is the MSB and bit 0 is the LSB. Bytes are read in the usual left to right order. The IP reverses the byte order to meet the requirements of the Ethernet standard. |
l2_rx_preamble | Output | 64 | Received preamble data. Available when you select PREAMBLE PASS-THROUGH mode. Valid when l2_rx_startofpacket is asserted. |
l2_rx_valid | Output | 1 | When asserted, indicates that l2_rx_data[127:0] is driving data. When this signal is low, the IP ignores l2_rx_data, l2_rx_startofpacket, l2_rx_endofpacket, l2_rx_empty, and l2_rx_error. |
l2_rx_startofpacket | Output | 1 | When asserted, indicates the first byte of a frame. |
l2_rx_endofpacket | Output | 1 | When asserted, indicates the last data byte of a frame, before the frame check sequence (FCS). In CRC pass-through mode, it is the last byte of the FCS. The packet can end at any byte position. |
l2_rx_empty | Output | 4 | Specifies the number of empty bytes when l2_rx_endofpacket is asserted. The packet can end at any byte position. The empty bytes are the low-order bytes. |
l2_rx_error | Output | 6 | When asserted in the same cycle as l2_rx_endofpacket, indicates the current packet should be treated as an error packet. It is valid when l2_rx_endofpacket is high. |
l2_rxstatus_valid | Output | 1 | When asserted, indicates that l2_rxstatus_data is driving valid data. |
l2_rxstatus_data[39:0] | Output | 40 | Specifies information about the received frame. |