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What is pulse width slack?
Pulse width refers to min width of high and low pulses of a clock. Period of a clock is one parameter but pulse width is also important ie you can’t have a clock where high pulse is 1ns and low pulse is 3ns which might pass min period constraint but fails high pulse width constraint (on one of my boards it is 1.167ns)
What is minimum pulse width?
A minimum pulse width check verifies that a clock high (“High”) or low (“Low”) pulse sustains long enough to qualify as a recognizable change in the clock signal at a register clock pin. A failed minimum pulse width check indicates that the register may not recognize the clock transition.
How is hold slack calculated?
As the clock frequency is given as a 100 MHz, time period = 1/frequency = 10 ns. Putting these values into equation for setup slack, we get setup slack for this timing path. So, for this timing path, setup slack value is 3 ns and hold slack value is 5 ns.
What is slack in timing analysis?
Slack is the margin by which a timing requirement is met or not met. Positive slack indicates the margin by which a requirement is met, and negative slack indicates the margin by which a requirement is not met.
What is difference between buffer and inverter?
In simple terms, Inverter takes an input signal and inverts it ( e.g 0 in 1 out, or 1 in 0 out). Buffer on the other hand, does not invert the signal, it simply makes the signal a little stronger.
Which is better buffer or inverter?
To save area, the first buffer is typically of a lower drive strength and is placed very closed to the second inverter. For applications which have a very stringent requirement on the clock high and low pulse widths, one might prefer to use an inverter based clock tree over the buffer based clock tree.
What do you mean by pulse width slack?
Re: What is the pulse width slack? Pulse width refers to min width of high and low pulses of a clock.
Where can I find the pulse width report?
Please refer to UG906, section “report pulse width”. The Pulse Width Report checks that the design meets min period, max period, high pulse time, and low pulse time requirements for each instance clock pin.
What is the pulse width slack in Vivado?
When I do the STA in Vivado, there is a parameter WPWS (Worst Pulse Width Slack). I try to understand what is pulse width slack, but I didn’t find a good reference. It will be great if anyone can recommand a reference or explain it in this post. Thanks in advance. 10-21-2013 02:45 PM
How to solve worst negative slack violation [ community forums ]?
Data sending from one board as input to another board. 1. In RPCDAQ_1, Generating counter data as LVDS out [utility buffer] 2. LVDS data out [counter data out] into RPCDAQ_2 [xc7k160tffg676-2] 3. Through RPCDAQ_2-> Aurora Tx, data should be transmitted to Aurora Rx -> RPCDAQ_1