Xilinx IP Ethernet AVB Endpoint v2.4 UG492 - Manual (Page 71)

Ethernet AVB Endpoint User Guide www.xilinx.com 71
UG492 September 21, 2010
Rx Legacy Traffic I/F
Partial Destination Address (DA) Match
The example illustrated in Figure 7-5 shows a single MAC Header Filter (one of the eight
provided) configured to filter on a partial Destination Address. In order for the frame to
obtain a match, the initial 29-bits (as used in this example) of the received frame must
exactly match the first 29-bits of the Match Pattern Register.
This functionality is useful for filtering across Multicast group Addresses.
X-Ref Target - Figure 7-5
Figure 7-5: Filtering of Frames with a Partial DA Match
rx_clk
legacy_rx_data[7:0]
legacy_rx_data_valid
rx_clk_enable
DA SA DATA L/T VLAN
0xD
A
0x01 0x02 0x0
3
0xFF 0xFF 0xFF 0x1F 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
Match
against
partial
DA
Don’t-cares
Match Pattern Register
Match Enable Register