用vivado的约束语句是: set_max_delay -to {A} 30 -datapath_only set_max_delay -from {A} 30 -datapath_only 但是在quartus的时序分析器中并不支持-datapath_only选项。 这里说的“所有寄存器”包括同步寄存器和异步时钟域的寄存器。 如果没有-datapath_only的支持,它会分析holdtime,导致异步时...
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 ...
Why does "set_max_delay -datapath_only" appear in the Unconstrained Path section of the "report_timing_summary" report? I used a set_max_delay constraint in my design, but now I see the TS_WR_CLK to TS_RD_CLK analysis under the "Unconstrained Paths" section of ...
The DATAPATHONLY option on the FROM:TO constraint truncates the Clock Skew to zero. Since the data path is a negative value, which is less than zero, there is a hold violation. Although it would seem that this is not possible, in this case, we have a hold time requirement (denoted in...
我想支持所有寄存器到寄存器A的数据路径最长只能是30ns。 用vivado的约束语句是: set_max_delay -to {A} 30 -datapath_only set_max_delay -from {A} 30 -datapath_only