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Ethernet AVB Endpoint Transmission
As illustrated in
from three types of sources:
1.
2.
3.
Tx Legacy Traffic I/F
The signals forming the Tx Legacy Traffic I/F are defined in
synchronous to the Tri-Mode Ethernet MAC transmitter clock, tx_clk, which must
always be qualified by the corresponding clock enable, tx_clk_en (see
This interface is intentionally identical to the client transmitter interface of the supported
Xilinx Tri-Mode Ethernet MAC core (there is a one-to-one correspondence between signal
names of the block-level wrapper from the Tri-Mode Ethernet MAC example design, after
the legacy_ prefix is removed). This provides backwards compatibility–all existing MAC
client-side designs can connect to the legacy Ethernet port unmodified.
Ethernet AVB Endpoint User Guide
UG492 September 21, 2010
Figure
5-1, data for transmission over an AVB network can be obtained
AV Traffic. For transmission from the
Precise Timing Protocol (PTP) Packets. Initiated by the software drivers using the
dedicated hardware
"Tx PTP Packet Buffer."
Legacy Traffic. For transmission from the
www.xilinx.com
"Tx AV Traffic I/F"
of the core.
"Tx Legacy Traffic I/F"
Table
5-2. All signals are
Chapter 6
of the core.
Table
5-1).
57
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