Altera FIR Compiler II MegaCore Function - Manual (Page 43)

Signal Direction Width Description
ast_sink_error
Input 2 Error signal indicating Avalon-ST protocol
violations on the sink side:
• 00: No error
• 01: Missing SOP
• 10: Missing EOP
• 11: Unexpected EOP
Other types of errors are also marked as 11.
ast_source_ready
Input 1 The downstream module asserts this signal if it is
able to accept data. This signal is not available when
backpressure is turned off.
ast_source_valid
Output 1 The IP core asserts this signal when there is valid
data to output.
ast_source_channel
Output Log
2
(number of
channels per
wire)
Indicates the index of the channel whose result is
presented at the data output.
ast_source_data
Output Data width ×
number of
channel output
wires
(PhysChanOut)
FIR II IP core filter output. For a multichannel
operation (number of channel output wires > 1), the
least significant bits of
ast_source_data
are
mapped to
xOut_0
of the FIR II IP core filter.
For example:
xOut_0[7:0]
-->
ast_source_data[7:0]
xOut_1[7:0]
-->
ast_source_data[15:8]
xOut_2[7:0]
-->
ast_source_data[23:16]
ast_source_sop
Output 1 Marks the start of the outgoing FIR II IP core filter
result group. If '1', a result corresponding to channel
0 is output.
ast_source_eop
Output 1 Marks the end of the outgoing FIR II IP core filter
result group. If '1', a result corresponding to channels
per wire N-1 is output, where N is the number of
channels per wire.
ast_source_error
Output 2 Error signal indicating Avalon-ST protocol
violations on the source side:
• 00: No error
• 01: Missing SOP
• 10: Missing EOP
• 11: Unexpected EOP
Other types of errors are also marked as 11.
4-10 FIR II IP Core Signals
UG-01072
2014.12.15
Altera Corporation FIR II IP Core Functional Description
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