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Old 12-04-2008, 10:02 AM
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Default Which terms include the setup time and hold time in Xilinx ISE timinganalysis?

Hello, All,

As I understand it, ISE Timing Analyzer does setup time analysis for
PERIOD, OFFSET IN and OFFSET OUT constraints as follows:

PERIOD
slack = (requirement - (data path - clock path skew + uncertainty))

OFFSET IN
slack = (requirement - (data path - clock path - clock arrival +
uncertainty))

OFFSET OUT
slack = (requirement - (clock arrival + clock path + data path +
uncertainty))

Q1: My impression is that "setup time" is included in the "data
path".
Is this correct? If yes, where is this documented?

Q2: Which term includes "hold time" in the analysis?
If yes, where is this documented? If no, why?

Thanks.

Carl Horton
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