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68 www.xilinx.com Ethernet AVB Endpoint User Guide
UG492 July 23, 2010
Chapter 7: Ethernet AVB Endpoint Reception
Figure 7-3 illustrates Legacy frame reception for an error free frame in which at least one of
the eight individual MAC Header Filters obtained a match (filter number 3 is illustrated as
having obtained the match in this example). Note the following:
• Each of the eight individual MAC Header Filters has a corresponding bit within the
legacy_rx_filter_match[7:0] bus. If the corresponding MAC Header Filter
obtains a match, the relevant bit will be asserted. This will be fully aligned with the
legacy_rx_data_valid signal during frame reception.
• Every bit within the legacy_rx_filter_match[7:0] bus will be asserted for
frame reception in which the Frame Destination Address (DA) contained a Broadcast
Address.
• Every bit within the legacy_rx_filter_match[7:0] bus will be asserted when
the MAC Header Filter is operating in Promiscuous Mode (see “Rx Filtering Control
Register”).
X-Ref Target - Figure 7-3
Figure 7-3: Normal Frame Reception: Address Filter Match
rx_clk
legacy_rx_data[7:0]
legacy_rx_data_valid
legacy_rx_frame_good
rx_clk_enable
DA SA DAT AL/T
legacy_rx_filter_match[0]
legacy_rx_filter_match[3]
legacy_rx_filter_match[1]
legacy_rx_filter_match[2]
legacy_rx_filter_match[4]
legacy_rx_filter_match[5]
legacy_rx_filter_match[6]
legacy_rx_filter_match[7]
legacy_rx_frame_bad