Xilinx UG492 manual AV Traffic Transmitter Path Signals, 3Legacy Traffic Signals Receiver Path

		Core Interfaces
Table 5-3:Legacy Traffic Signals: Receiver Path
Signal	Direction	Description
legacy_rx_frame_good	Output	Asserted at the end of frame reception to
		indicate that the frame should be
		processed by the MAC client.
legacy_rx_frame_bad	Output	Asserted at the end of frame reception to
		indicate that the frame should be
		discarded by the MAC client: either the
		frame contained an error, or it was
		intended for the PTP or AV traffic
		channel.
legacy_rx_filter_match[7:0]	Output	This output is only present when the
		“MAC Header Filters” are present (when
		the core is generated in “Standard CORE
		Generator Format”).
		When present, each bit in the bus
		corresponds to one of the unique
		“Legacy MAC Header Filters.” A bit is
		asserted, in alignment with
		legacy_rx_data_valid signal, if the
		corresponding filter number obtained a
		match.

AV Traffic Interface

AV Traffic Transmitter Path Signals

Table 5-4defines the core client-side AV traffic transmitter signals, used to transmit data from the AV client logic into the core. All signals are synchronous to the MAC transmitter clock, tx_clk, which must be qualified by the corresponding clock enable, tx_clk_en (see “Clocks and Resets”).

Table 5-4:AV Traffic Signals: Transmitter Path

Signal	Direction	Description
av_tx_data[7:0]	Input	Frame data to be transmitted is supplied on this
		port
av_tx_valid	Input	A data valid control signal for data on the
		av_tx_data[7:0] port
av_tx_done	Input	Asserted by the AV client to indicate that further
		frames, following the current frame, are/are not
		held in a queue.
av_tx_ack	Output	Handshaking signal asserted when the current
		data on av_tx_data[7:0] has been accepted.

Ethernet AVB Endpoint User Guide www.xilinx.com 49

UG492 July 23, 2010