Altera Triple Speed Ethernet MegaCore Function Uživatelský manuál Strana 128

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DescriptionI/OAvalon-ST Signal
Type
Name
Transmit MAC clock (2.5/25/125 MHz) for the
Avalon-ST transmit data interface.
Oclkmac_tx_clk
Multiport MAC Receive Interface Signals
Table 7-14: MAC Receive Interface Signals
DescriptionI/OAvalon-ST Signal
Type
Name
Receive data valid. When asserted, this signal
indicates that the data on the following signals are
valid: data_rx_data_n, data_rx_sop_n, data_
rx_eop_n, and data_rx_error_n.
Ovaliddata_rx_valid_n
Receive data.Odatadata_rx_data_n[7:0]
Receive start of packet. Asserted when the first byte
or word of a frame is driven on data_rx_data_n.
Ostartofpacketdata_rx_sop_n
Receive end of packet. Asserted when the last byte
or word of frame data is driven on data_rx_data_
n.
Oendofpacketdata_rx_eop_n
Receive application ready. Assert this signal on the
rising edge of data_rx_clk_n when the user
application is ready to receive data from the MAC
function.
If the user application is not ready to receive data,
the packet is dropped or truncated with an error.
Ireadydata_rx_ready_n
Receive error. Asserted with the final byte in the
frame to indicate that an error was detected when
receiving the frame. For the description of each
bit, refer to the description of bits 5 to 1 in MAC
Receive Interface Signals on page 7-4 . Bit 4 of
this signal maps to bit 5 in the table and so forth.
Oerrordata_rx_error_n[4:0]
Multiport MAC Transmit Interface Signals
Table 7-15: MAC Transmit Interface Signals
DescriptionI/OAvalon-ST Signal
Type
Name
Avalon-ST Signals
Altera Corporation
Interface Signals
Send Feedback
7-13
Multiport MAC Receive Interface Signals
UG-01008
2014.06.30
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