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Hello my friend.I had a good Transceiver Hackrf one. i know some about transceiver . i know we can categorize Transceiver to three stage: BaseBand Intermediate Band Radio Band 136145136145 for it we have define three gain. BB gain IF gain RF gain my question
Can I always set false path for violation occurring at inter-clock-path ? ( provided , CDC is taken care in RTL ) Yes. How to solve Intra-clock-path timing violations ( setup and hold ) Provided that you follow good FPGA design practices (mainly using dedicated clock routes) - hold time violations will rare
Changing RTL is always the easiest option. Have you got register merging turned off? Than can help reduce the register fan outs. All false paths and multi cycle paths specified? Finally you can try overconstraining a single path using a set max delay, but this can often make it harder to route adjacent nets and is a rather tedious job. Why can't
In the case of ASIC, there are many ways to fix set up and hold like upsizing/downsizing cells, buffering/removing buffer, skew insertion, LVT/HVT cells etc. What about FPGA? I see many articles referring to fixing setup and hold violations in ASIC. But I don't see much help for FPGA. How can I deal with setup and hold violations in FPGA??
Hello, MCP is multicycle path during capture only as we are running shift at low speed. If we provide multiple cycles, it will detect the non scan flops in between 2 scan flops. It will detect MCPs also, Suppose we set sequential depth as 3, it will detect MCP with 3 cycles and also non scan flops which are in between scan flops.
There are two clock made constraint as create_clock. If I don't set false_path about these two clock. After CTS, are these two path balance ? What action does CTS handle false_path constraint ? For CTS, these two clocks are treat as independent and have not balance ?? Thanks.
I read few papers related to Neutrosophic sets. Main idea of all papers is to transform image (or other signal) to True (T), Indeterminacy (I) and false (F) values. In case of RGB or grayscale image we must get (T,I,F) image, and then do segmentation using that resulting image. Sometimes authors propose that F=1-T, other authors use separate formul
While trying to do PnR of a design, I see that the dont use attribute of 95% of the standard cells in the .lib file of the standard cell library are set to be true. Why they are included in the lib file if they are supposed to be set to dont use?? Can I change the dont use attribute and use the cells in my design?
While doing synthesis if there are multiple clock domains we can either use set_clock_group or set false paths for all the paths among the multiple clock domains. What the advantages and disadvantages between these two ways of either using set_clock_group or setting false paths among clock (...)
I am not able to understand properly. However there are plenty of clocks in the design and some are clocks generated by PLL's. The clocks that I needed was the clock which Nios uses and that was system clock 25Mhz and the other is the pixel data clock which is used to sample the pixel data from the camera sensor and the valid signals which is 75Mhz
What are the minimum required constraints to be given while synthesising a design? 1. clock period 2. input delay 3. output delay 4. clock uncertainity 5. clock latency 6. set load Other than the constraints listed above, what are the basic constraints required?
Please let me know that I am using Arduino Mega2560 with keypad + MAX7221 + LCD And I want to cascade MAX7221 ICs so my question is that would I write these functions lc.shutdown(0,false); /* set the brightness to a medium values */ lc.setIntensity(0,8); /* and clear the display */ lc.clearDisplay(0);)
Someone suggested to use interface_timing=true for latches in .lib file. I cannot find info on what this attribute really does. In the Liberty reference manual, it says Indicates that the timing arcs are interpreted according to interface timing specifications semantics. If this attribute is missing or its value is set to false, the timing rela
HFSS is really bad at meshing curves. Avoid any automatic curve difinitions. Instead use extrusions with multi-line patches, or at least stepped function curves, where you can set up number of steps explicitly. The same is for circles and cylinders. To avoid false "numeric" resonances - rotate your circular objects to make them "out of phase", i.e
Hi All, I am using Xilinx's Vivado 2013.3 for generating the *.bin file. There are a lot asynchronous paths in my design. for example if I have grouped the signals like : # in CLK1 domain set GROUP1 ; set GROUP1 ; set GROUP1 ; # in CLK2 domain set GROUP2 [get_cells {sig_
You are talking about CDC checks for making sure e.g. the set of signals crossing the domain do not have a delay spread larger than one receiving-domain clock period? You still might want to declare a FP between the unrelated clocks, e.g. if you are specifying min/max delay constraints as point-to-point timing exceptions only for the actual CDC pa
a false path is one that would usually be analysed by the timing analyser, but for whatever reason, you dont want it to do it. An example would be signals that cross a clock domain boundary, or maybe something that you set once and doesnt change for a very long time, and having a "failing" path wont really have an effect on the design.
in clock domain crossing, you set false path for hold while doing synthesis because two clocks are asynchronous and timing cannot checked. But you set set_max_delay and set_min_delay on these paths. so that data should reach after specified delay.
Just want to know the opinion of the forum. Is it preferred to use exactly the same set of constraints for both synthesis using DC, and STA using PrimeTime? Does the synthesis tool use the false path specifications, or max transition constraints? Or can we use a simpler constraint file to do synthesis, and then use a more elaborate constraint
Is it necessary to set false path during FPGA synthesis? How can it be done if it is yes? Regards