通过源时钟的边沿设置生成时钟,以下图为例。 对应的命令为create_generated_clock -name gen_clk -source [get_pins clk_IBUF_BUFG_inst/O] -edges {1 3 4} -edge_shift {2.0 0.0 1.0} -add -master_clock [get_clocks "*"] [get_pins {shiftr_reg[13]/C}] 含义解释:-edge {1,3,4}即生成时...
对应的命令为create_generated_clock -name gen_clk -source [get_pins clk_IBUF_BUFG_inst/O] -edges {1 3 4} -edge_shift {2.0 0.0 1.0} -add -master_clock [get_clocks "*"] [get_pins {shiftr_reg[13]/C}] 含义解释:-edge {1,3,4}即生成时钟的第1个上升沿位置,第1个下降沿位置,第2...
create_clock -name CLK -period 10 -waveform {0 5} [get_pins U1/Y] create_generate_clock -name GCLK -source [get_pins U1/Y] -edge {1 3 7} -master_clock CLK [get_pins U2/Y] create_generate_clock -name OUTCLK -source [get_pins U2/Y] -master_clock GCLK -divide_by 1 [get_p...
create_generated_clock [-name <name>] [-divide_by <divide_by>] [-multiply_by <multiplier>] [-source_waveform {<period> <duty>}] [-source <clock source>] [-rise_edge| -fall_edge] [-create_exclusive_clocks] [-create_clock_uncertainty] -period <period> 其中,name参数用于指定生成的时钟...
考虑了edge/edge_shift的3分频实例 下面是3分频的实例,-edge选项中{3 5 9}分别表示SYSCLK的第3、5、9个时钟沿(clock edge),也分别对应DIV3B的一个完整时钟周期(上升、下降、上升)的时钟沿时间点。 而-edge_shift选项{2.2 2.2 2.2}表示将DIV3B每个时钟沿都往后延迟2.2ns,命令和效果图如下: ...
create_generated_clock[-h | -help] [-long_help][-add][-divide_by<factor>][-duty_cycle<percent>][-edge_shift<shift_list>][-edges<edge_list>][-invert][-master_clock<clock>][-multiply_by<factor>][-name<clock_name>][-offset][-phase<degrees>]-source<clock_source>[<targets>] Argumen...
create_clock [-name clock_name] \ -period period_value \ [-waveform edge_list] \ [-add] \ [source_objects] create_generated_clock命令解析 create_generated_clock命令格式如下,主要是定义generated clock和master clock的关系: create_generated_clock [-name clock_name] \ -source master_pin \ [-...
create_generated_clock -sourcereference_pin[-divide_bydivide_factor] [-multiply_bymultiply_factor] [-invert] source Arguments -sourcereference_pin Specifies the reference pin in the design from which the clock waveform is to be derived.
**ERROR: (TA-152): A latency path from the 'Rise' edge of the master clock at source pin 'CLK_FAST' to the 'Fall' edge of generated clock 'clks' at pin 'generate_ic_clocks/CLK_SLOW_reg/Q' cannot be found. You must modify your create_generated...
Syntax: create_generated_clock [-name <arg>] [-source <args>] [-edges <args>] [-divide_by <arg>] [-multiply_by <arg>] [-combinational] [-duty_cycle <arg>] [-invert] [-edge_shift <args>] [-add] [-master_clock <arg>] ...