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Altera_Forum's avatar
Altera_Forum
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13 years ago

TimeQuest Timing Analyzer[Setup slack analysis]

HI, I am trying to understand how the Time Quest analyzer calculating required setup and hold time.I have written code for register and the clocks are common(50 MHz). As per my understanding da...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

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Just let me make this clear.

These FF with negative Th do NOT have extra delay buffers for the purpose of having negative Th. These FFs are highly optimized circuits, for area/power/speed and the negative Th is a side-effect of the circuit design and the balance of the various paths inside the circuit.

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going back to original thread. if micro tSU is negative then the report should say that.If it is positive it should say that. It clearly states a positive value on micro tSU in first post. So the question is again why the required data time equation says subtract tSU but the tool is adding it???