Ethernet Design Example Components User Guide

ID 683044
Date 9/27/2021
Public

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3.4.2. Avalon® Streaming Interface Signals

Table 28.   Avalon® Streaming Signals Description
Name Direction Width Description
data_sink_sop In 1 Assert this signal to indicate the beginning of the packet.
data_sink_eop In 1 Assert this signal to indicate the end of the packet.
data_sink_valid In 1 Assert this signal to indicate that the data_sink_data[] signal and other signals on this interface are valid.
data_sink_ready Out 1 When asserted, this signal indicates that the packet classifier is ready to accept data.
data_sink_data[] In n 1 The input packet.
data_sink_empty[] In 2, 3 Use this signal to specify the number of empty bytes in the cycle that contain the end of packet.

The width of this signal is 2 when the SYMBOLSPERBEAT parameter is 4; 3 when the parameter is 8. This signal does not exist when the SYMBOLSPERBEAT is 1.

data_sink_error In 1 Assert this signal to indicate that the current input packet contains errors.
data_src_sop Out 1 When asserted, this signal indicates the beginning of the packet.
data_src_eop Out 1 When asserted, this signal indicates the end of the packet.
data_src_valid Out 1 When asserted, this signal indicates that the data_src_data[] signal and other signals on this interface are valid.
data_src_ready In 1 Assert this signal when the receiving component is ready to accept data.
data_src_data[] Out n 1 The output data.
data_src_empty[] Out 2, 3 Contains the number of empty bytes in the cycle that contain the end of packet.

The width of this signal is 2 when the SYMBOLSPERBEAT parameter is 4; 3 when the parameter is 8. This signal does not exist when the SYMBOLSPERBEAT is 1.

data_src_error Out 1 When asserted, this signal indicates that the current output packet contains errors.
1 n=SYMBOLSPERBEAT*BITSPERSYMBOL