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Altera_Forum's avatar
Altera_Forum
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17 years ago

How to write the blank room?

I use two separate pathway to translate data to two separate FIFO, then with TDMA style, the data of the two separate pathway is written to a bus. My problem is every frame of the two pathway-da...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

If I understand correctly, your transmitting more data than you're using. It really depends on what your requirements are:

- Ease - Just leave it as is. This may be 0s, but might be a re-transmit of what you already did. This is also probably the least amount of logic

- Power - Having it drive a constant is best

- DC/Edge requirements - Some protocols, usually CDR require a certain density of edges, and/or a certain DC balance over time. I'm sure you'd already know if you had this requirement, but just mentioning it

- Reliability - You could retransmit it and compare to check for errors. You could encode/decode the data, which usually requires overhead. You could interleave, etc.

- Increase bandwidth of data or use it for something else. Many systems will use as much bandwidth as they can get.

Anyway, just some ideas. Most likely just tie it to 0, but it's hard to say without more info.