Altera Low Latency 40-Gbps Ethernet MAC and PHY MegaCore Function - Manual (Page 54)

Signal Name Direction Description
l_tx_error
Input When asserted in an EOP cycle (while
l_tx_
endofpacket
is asserted), directs the IP core to insert an
error in the packet before sending it on the Ethernet link.
This signal is a test and debug feature. In loopback mode,
the IP core recognizes the packet upon return as a
malformed packet.
Figure 3-4: Traffic on the TX and RX Avalon-ST Client Interface for Low Latency 40GbE IP Core
Shows typical traffic for the TX and RX Avalon-ST interface Low Latency 40GbE IP core.
l4_tx_data[255:0]
l4_tx_startofpacket
l4_tx_endofpacket
l4_tx_empty[4:0]
l4_tx_ready
l4_tx_valid
l4_rx_data[255:0]
l4_rx_startofpacket
l4_rx_endofpacket
l4_rx_empty[4:0]
l4_rx_valid
l4_rx_error[5:0]
2 . 2 . 2 . 2C83 . 2C8300392C8300382C . 3 . 3 . 3 . 3 . 3 . 3EF9 . 3EF900553EF90054 . 3EF9 . 3EF9
00
0D 00
.. 7B44 . 7B44 . 7B44 . E . EFB8 . EFB8 . EFB8 . EFB8 . EFB8 . EFB8 . E . EAD . EAD2 . EAD2 . EAD
.
1E 02 1A
00
Figure 3-5: Traffic on the TX and RX Avalon-ST Client Interface for Low Latency 100GbE IP Core
Shows typical traffic for the TX and RX Avalon-ST interface of the 100GbE IP core.
l8_tx_data[511:0]
l8_tx_startofpacket
l8_tx_endofpacket
l8_tx_empty[5:0]
l8_tx_ready
l8_tx_valid
l8_rx_data[511:0]
l8_rx_startofpacket
l8_rx_endofpacket
l8_rx_empty[5:0]
l8_rx_valid
l8_rx_error[5:0]
.. . . . . . . . . 7CD901437CD901427C . . . . . . . . 3BCA01273BCA01263BCA01253 . . . . .
00 2F 00 29 00
64.. 64 . . A . . A . A . . A . . 6 . . 6 . . 6E . 6 . 07 . . FF . . FF . 07 . . FD4 . . 0707070707070
30 . 30 10 30 . 22 02 22 0D 2E 0E . 05 .
00
UG-01172
2015.05.04
Low Latency 40-100GbE IP Core TX Data Bus with Adapters (Avalon-ST Interface) 3-9
Functional Description Altera Corporation
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