Is there a way to add a constraint specifying the max delay between two points (without the clock skews, etc taken into consideration)? I understand that in many cases, taking the skew into consideration is desirable, but I do have a case where I simply don't care about the clock skew...
Ignoring clock skews in set_max_delay constraint Subscribe More actions UserQuartus19-3 Beginner 07-28-2020 12:46 AM 3,419 Views Solved Jump to solution Hi I have a clock domain crossing in my design and I have placed synchronisers at the crossing paths. I ...
This constraint also overrides a multicycle path constraint.ExamplesThe following example sets a maximum delay by constraining all paths from ff1a:CLK or ff1b:CLK to ff2e:D with a delay less than 5 ns:set_max_delay 5 -from {ff1a:CLK ff1b:CLK} -to {ff2e:D}...
[Vivado 12-1387] No valid object(s) found for set_max_delay constraint with option 'from'. [C:/Design/v_tc.xdc:1] Resolution: Check if the specified object(s) exists in the current design. If it does, ensure that the correct design hierarchy was specified for the object. WARNING: ...
50384 - 2013.2 Vivado 时序 - ERROR: [Constraints-443] set_max_delay -datapath_only: 't1_reg/Q' is not a valid start point Description 应用set_max_delay constraint 时遇到如下错误。 ERROR: [Constraints-443] set_max_delay -datapath_only: 't1_reg/Q' is not a valid start ...
2.8.4.4. set_max_delay and set_min_delay The maximum delay and minimum delay for a point-to-point timing path constraint is specified in the Precision Synthesis software. Using the set_max_delay Constraint set_max_delay -from {<from_node_list>} -to {<to_node_list>} <delay_value> ...
And based on the wording of the set_max_delay discussion of endpoints, I reached a conclusion that R or P could not be included in a set_max_delay constraint. Glad to know it does not need to be explicitly declared. So I will remove those from my XDC and give it a whirl. BTW, ...
建立时间set_input_delay -max; set_output_delay -maxinput_delay:从上图可以看出,我们所要定义的输入延时是指被综合模块外的寄存器触发的信号在到 达被综合模块之前经过的延时,在上图中就是外围触发器的clk-q的延时加上M电路的延时(输入延时)。确定之后,模块内部输入延时就确定了。假如时钟周期是 20ns,输入...
set_max_skew -from_clock { clock } -to_clock { * } -from foo -to blat 2 The set_max_delay, set_min_delay, and set_multicycle_path constraints do not affect the set_max_skew timing constraint. However, the set_clock_groups constraint does impact the set_max_skew constraint. Note...
A constraint is considered "Unsatisfiable" for an incoming pod if and only if every possible node assigment for that pod would violate "MaxSkew" on some topology. For example, in a 3-zone cluster, MaxSkew is set to 1, and pods with the same labelSelector spread as 3/1/1: | zone1...