Altera Triple Speed Ethernet MegaCore Function - Manual (Page 129)

Description I/O Avalon-ST Signal
Type
Name
Transmit data valid. Assert this signal to indicate
that the data on the following signals are valid:
data_tx_data
_n,
data_tx_sop
_n,
data_tx_eop
_
n, and data_tx_error _n.
I valid
data_tx_valid_
n
Transmit data. I
data data_tx_data
_n[7:0]
Transmit start of packet. Assert this signal when
the first byte in the frame is driven on
data_tx_
data
_n.
I
startofpacket data_tx_sop
_n
Transmit end of packet. Assert this signal when
the last byte in the frame (the last byte of the FCS
field) is driven on
data_tx_data
_n.
I
endofpacket data_tx_eop
_n
Transmit frame error. Assert this signal with the
final byte in the frame to indicate that the transmit
frame is invalid. The MAC function then forwards
the frame to the GMII with error. I
error data_tx_error
_n
MAC ready. When asserted, this signal indicates
that the MAC function is ready to accept data from
the user application. O
ready data_tx_ready
_n
Component-Specific Signal
Transmit CRC insertion. Assert this active-low
signal when
data_tx_eop _n is asserted for the
MAC function to compute the CRC and insert it
into the frame. Otherwise, the user application is
expected to provide the CRC.
I
— tx_crc_fwd
_n
Multiport MAC Packet Classification Signals
The MAC packet classification interface is an Avalon-ST source port which streams out receive packet
classifications.
Table 7-16: MAC Packet Classification Signals
Description I/O Avalon-ST Signal
Type
Name
When asserted, this signal indicates that classifica-
tion data is valid. O
valid pkt_class_valid_
n
Interface Signals Altera Corporation
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Multiport MAC Packet Classification Signals 7-14
2014.06.30