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Altera_Forum's avatar
Altera_Forum
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16 years ago

Timequest & Output delay problem

Hey: I'm using Timequest and am looking at output timing for an external interface. I've specified a virtual clock for my set_output_delay command with a value of 14.22ns which is the se...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

shouldn't "So your set_output_delay max should be: max_data_board_delay + max_clock_board_delay + external_device_tSU."

be:

max trace delay for data + Tsu of external device - min trace delay for clock

?

i.e. the setup plus skew.

?

Please be gentle

- every app note/white paper/forum thread confuses me more -

Sorry for adding to the confusion.

Any chance of an altera definitive guide one day?