F-Tile Ethernet Intel® FPGA Hard IP User Guide

ID 683023
Date 12/04/2023
Public
Document Table of Contents

7.5.1. RX MAC Segmented Client Interface with Disabled Preamble Passthrough

Table 46.  RX MAC Field Positions in o_rx_mac_data with Preamble Passthrough Disabled
40GE/50GE/100GE/200GE/400GE

o_rx_mac_data

10GE/25GE

o_rx_mac_data

MAC Field Note
[7:0] [7:0] Dest Addr[47:40] The first octet of the Destination Address, follows Start Frame Delimiter (SFD).
[15:8] [15:8] Dest Addr[39:32]  
[23:16] [23:16] Dest Addr[31:24]  
[31:24] [31:24] Dest Addr[23:16]  
[39:32] [39:32] Dest Addr[15:8]  
[47:40] [47:40] Dest Addr[7:0]  
[55:48] [55:48] Src Addr[47:40]  
[63:56] [7:0] Src Addr[39:32]  
[71:64] [7:0] Src Addr[31:24]  
[79:72] [15:8] Src Addr[23:16]  
[87:80] [23:16] Src Addr[15:8]  
[95:88] [31:24] Src Addr[7:0]  
[103:96] [39:32] Length/Type[15:0]  
[111:104] [47:40] Length/Type[7:0]  
[…:112] [63:48]  

For 10GE/25GE variants, the header arrives over 2 clock cycles.