Altera 100G Interlaken MegaCore Function Manual de usuario descargar pdf (Pagina 51)

4'b1011 on irx_eopbits to indicate that the data the IP core transfers to the application in this cycle are

the final words of the packet, and that in the final word of the packet, only three bytes are valid data. The

value the IP core drives on irx_chan indicates this burst targets channel 4.

In cycle 4, the irx_num_valid[7:4] signal has the value of zero, which means this cycle is an idle cycle.

In cycle 5, the IP core sends another single-cycle data burst to channel 2, by assertingirx_sob[1] and

irx_eob to indicate this data is both the start and end of the burst. The IP core does not assert

irx_sop[1], because this burst is not start of packet data. irx_eopbits has the value of 4'b0000,

indicating this burst is also not end of packet data. This data follows the data burst transfered in cycles 1

and 2, within the same packet the IP core is sending to channel 2.

In cycle 6, the IP core sends a start of packet, single-cycle data burst to channel 3.

In cycles 7 and 8, the IP core sends a two-cycle data packet in one two-cycle burst. In cycle 8, the second

data cycle, the IP core drives the value of two on irx_num_valid[7:4] and the value of 4'b1011 on

irx_eopbits, to tell the application that in this clock cycle, the two most significant words of the data

symbol contain valid data and the remaining words do not contain valid data, and that in the second of

these two words, only the three most significant bytes contain valid data.

UG-01128

2015.05.04

100G Interlaken IP Core Receiver Side Example

4-21

Functional Description

Altera Corporation

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Altera 100G Interlaken MegaCore Function Manual de usuario Pagina 51