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Altera_Forum's avatar
Altera_Forum
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8 years ago

What does usedw count in FIFO that has different input and output widths?

It is possible to have DCFIFO that has 16 bit input port and 32 bit output port and also reverse! What does the usedw signal count in these scenarios? Does it count how many 16 bit words it has st...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

The SCFIFO core doesn't support mixed width as far as I can tell.

The DCFIFO does however, but that has separate read and write used word signals (wrusedw and rdusedw). So they will represent the width of the respective ports.