Avalon-st interfaces in dsp ip cores, Avalon-st interfaces in dsp ip cores -10 – Altera CIC MegaCore Function User Manual
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Parameter Name
Value
SYMBOLS_PER_BEAT
Single input, single output architectures, have one
symbol per beat at the source and the sink. MISO
architectures have <number of interfaces> symbols
per beat at the sink, and a single symbol per beat
at the source. SIMO architectures have <number
of interfaces> symbols per beat at the source, and a
single symbol per beat at the sink.
SYMBOL_TYPE
Signed
ERROR_DESCRIPTION
• 00: No error
• 01: Missing
startofpacket
(SOP)
• 10: Missing
endofpacket
(EOP)
• 11: Unexpected EOP or any other error
Related Information
For more information about the Avalon-ST interface
Avalon-ST Interfaces in DSP IP Cores
Avalon-ST interfaces define a standard, flexible, and modular protocol for data transfers from a source
interface to a sink interface.
The input interface is an Avalon-ST sink and the output interface is an Avalon-ST source. The Avalon-ST
interface supports packet transfers with packets interleaved across multiple channels.
Avalon-ST interface signals can describe traditional streaming interfaces supporting a single stream of
data without knowledge of channels or packet boundaries. Such interfaces typically contain data, ready,
and valid signals. Avalon-ST interfaces can also support more complex protocols for burst and packet
transfers with packets interleaved across multiple channels. The Avalon-ST interface inherently synchro‐
nizes multichannel designs, which allows you to achieve efficient, time-multiplexed implementations
without having to implement complex control logic.
Avalon-ST interfaces support backpressure, which is a flow control mechanism where a sink can signal to
a source to stop sending data. The sink typically uses backpressure to stop the flow of data when its FIFO
buffers are full or when it has congestion on its output.
Related Information
•
3-10
Avalon-ST Interfaces in DSP IP Cores
UG-CIC
2014.12.15
Altera Corporation
CIC IP Core Functional Description