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Altera_Forum's avatar
Altera_Forum
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17 years ago

[SOPC Builder] Connect 2 Avalon ST interfaces with different clock domains

Is there an easy way to connect 2 Avalon ST interfaces each with its own clock domains? I expected there should be a ST adapter will do the job but look like there is no such thing. Advice...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Just put a dual-clock FIFO in between them. This is how it's done throughout the Avalon ST based components. Use the rdempty signal on the read side to provide your valid signal. Use the wrfull signal on the write side (and maybe wrusedw depending on the ready latency) to provide the ready signal.

Can't get easier than that. Probably take you all of 10 minutes to code. Be sure to pass the startofpacket, and endofpacket and any other needed signals through the FIFO.

Jake