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Altera_Forum
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9 years ago

SDC: forwarding clock with 90 degree offset

I am trying to setup a DDR source synchronous output interface in which the data/clock are center aligned. The obvious solution was to launch my data using a 0 degree clock, and forward the clock usi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

ah okay. Thanks again. Looks like I was forgetting the -source field. So I guess one complaint I have in general about SDC is using the hard coded paths "pll_90deg|outclk1" which doesn't lend itself to portability, and plus I usually don't know the hard coded paths until I perform the build and zoom into the RTL aligned. I wish upon wishes I could just tell the tools "this is what I need to happen at the pins....does it?" Oh well maybe someday.