set_clock_groups -asynchronous -groupclka -groupclkb 【命令1】 AI代码助手复制代码 用false path的方法: set_false_path -from[get_clock clka]-to[get_clock clkb]【命令2】set_false_path -from[get_clock clkb]-to[get_clock clka] AI代码助手复制代码 比较下来,似乎clock group的方法更为直观一...
create_clock -name clk_ddr -period 6 [get_ports DDR_CLK_IN] set_output_delay -clock clk_ddr -max 2.1 [get_ports DDR_OUT] set_output_delay -clock clk_ddr -max 1.9 [get_ports DDR_OUT] -clock_fall -add_delay set_output_delay -clock clk_ddr -min 0.9 [get_ports DDR_OUT] set_...
的关系。这是很重要的一步,因为通常我们还需要做cross domain check,如果clockgroup设错了,会导致整个STA检查错误。一般有三个选项:asynchronous...set_clock_uncertaintyset_clock_groups任何sdc首先定义的都是时钟,对于一个同步电路而言,缓存器和缓存器之间的路径延迟时间必须小于一个Clock周期(Period ...
set_clock_groups -asynchronous -group {clkB PLL2_c0 PLL2_c1 } set_clock_groups -asynchronous -group {dsp_clk PLL3_c0 PLL3_c1 PLL3_c2} This will do the same thing as the first example. The reason I recommend it is because of the second bullet. If you add another output called...
set_clock_groups -asynchronous -group {clkB PLL2_c0 PLL2_c1 } set_clock_groups -asynchronous -group {dsp_clk PLL3_c0 PLL3_c1 PLL3_c2} This will do the same thing as the first example. The reason I recommend it is because of the second bullet. If you add another output called...
3D Crossword Pluginapplication/vnd.hzn-3d-crossword.x3dIANA: 3D Crossword Plugin 3GPvideo/3gpp.3gpWikipedia: 3GP 3GP2video/3gpp2.3g2Wikipedia: 3G2 3GPP MSEQ Fileapplication/vnd.mseq.mseqIANA: 3GPP MSEQ File 3M Post It Notesapplication/vnd.3m.post-it-notes.pwnIANA: 3M Post It Notes ...
set_clock_groups -asynchronous -group {clkB PLL2_c0 PLL2_c1 } set_clock_groups -asynchronous -group {dsp_clk PLL3_c0 PLL3_c1 PLL3_c2} This will do the same thing as the first example. The reason I recommend it is because of the second bullet. If you add another output called...
My device is Cyclone III EP3C16F256. In my design, I have two clock, clk2 is derived from clk1 in PLL with 180 degree phase shift. There is 1bit data
set_input_delay -clock { RX_CLK } -clock_fall -max $uC_tCOmax [get_ports { RC_Data0 }] Case 2 create_clock -period 20 [get_ports { RX_CLK }] create_clock –name RX_CLK _Virtual -period 20 set_input_delay -clock { RX_CLK _Virtual } -clock_fall -min -$uC_tCOmin ...
There is 1bit data in clk2 clock domain which need to be sampled in clk1 clock domain. Since the clk2 is derived from clk1 with fixed phase difference, is it possible to sample the data correctly just with SDC constraints instead of traditional asynchronous methods(asynchron...