Achronix Speedster22i 10G/40G/100G Ethernet - Manual (Page 36)

36 UG029, September 6, 2013
Table 20 – FIFO Interface Frame Format
Byte Number Field
0 to 5 Destination MAC Address
6 to 11 Source MAC Address
12 to 13 Length / Type Field
14 to N Payload Data
VLAN tagged frames are also supported on both transmit and receive and implement
additional information (VLAN Type and Info fields).
Table 21 – FIFO Interface VLAN Frame Format
Byte Number Field
0 to 5 Destination MAC Address
6 to 11 Source MAC Address
12 to 15 VLAN Type and VLAN Info
16 to 17 Length / Type Field
18 to N Payload Data
Note: The standard defines that the least significant byte of the MAC address is sent/received first,
while for all other header fields (i.e. Length / Type, VLAN Tag, VLAN Info and Pause Quanta), the
most significant byte is sent/received first.