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Altera_Forum
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15 years ago

ALTLVDS buffer implementation

I'm using an altlvds_rx receiver in Cyclone III with external PLL. For the buffer implementation I can choose between RAM, MUX and LE. Could there be a reason to make a choice other than resource usa...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Well there's one good reason not to use RAM buffer. It adds a variable data latency to rx_out after a reset or power cycle.

The MUX and LE and they both give a FIXED latency of 3 slow clock periods.

The LE buffer implementation uses a lot of resources, so I stick with the MUX buffer implementation.

See also another thread I've posted today.

Cheers, Ton