Avalon Interface Specifications (PDF) - Altera
Avalon Interface Specifications (PDF) - Altera
Avalon Interface Specifications (PDF) - Altera
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5. <strong>Avalon</strong> Streaming <strong>Interface</strong>s<br />
You can use <strong>Avalon</strong> Streaming (<strong>Avalon</strong>-ST) interfaces for components that drive high<br />
bandwidth, low latency, unidirectional data. Typical applications include multiplexed<br />
streams, packets, and DSP data. The <strong>Avalon</strong>-ST interface signals can describe<br />
traditional streaming interfaces supporting a single stream of data without<br />
knowledge of channels or packet boundaries. The interface can also support more<br />
complex protocols capable of burst and packet transfers with packets interleaved<br />
across multiple channels. Figure 5–1 illustrates a typical application of the <strong>Avalon</strong>-ST<br />
interface.<br />
Figure 5–1. <strong>Avalon</strong>-ST <strong>Interface</strong> - Typical Application<br />
Printed Circuit Board<br />
<strong>Altera</strong> FPGA<br />
<strong>Avalon</strong>-ST <strong>Interface</strong>s (Data Plane)<br />
<strong>Avalon</strong>-ST<br />
Input<br />
Rx IF Core<br />
ch<br />
2<br />
Tx IF Core<br />
Source<br />
0-2<br />
Sink<br />
1<br />
0<br />
Source Sink<br />
<strong>Avalon</strong>-MM <strong>Interface</strong> (Control Plane)<br />
<strong>Avalon</strong>-MM<br />
Master Port<br />
Processor<br />
Scheduler<br />
<strong>Avalon</strong>-MM<br />
Master Port<br />
IO Control<br />
<strong>Avalon</strong>-MM<br />
Slave Port<br />
SDRAM Cntl<br />
SDRAM<br />
Memory<br />
Chip<br />
<strong>Avalon</strong>-ST<br />
Output<br />
All <strong>Avalon</strong>-ST source and sink interfaces are not necessarily interoperable. However,<br />
if two interfaces provide compatible functions for the same application space,<br />
adapters are available to allow them to interoperate.<br />
May 2013 <strong>Altera</strong> Corporation <strong>Avalon</strong> <strong>Interface</strong> <strong>Specifications</strong>
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