set_clock_sense [-positive] [-negative] [-pulse pulse] [-stop_propagation] [-clock clock_list] pin_list 命令在引脚上设置时钟属性。 set_clock_transition [-rise] [-fall] [-min] [-max] transition_clock_list 命令指定时钟定义点处的时钟过渡时间。 例子: set_clock_transition -min 0.5 [get_...
create_generated_clock使用-invert/-preinvert选项都表明generated clock与master clock相位相反,但这两个选项的区别是: preinvert : Creates a generated clock based on the inverted sense of the master clock. invert : Creates an inverted generated clock based on the non-inverted sense of the master cloc...
set_clock_sense [-positive] [-negative] [-pulse pulse] [-stop_propagation] [-clock clock_list] pin_list 命令在引脚上设置时钟属性。 set_clock_transition [-rise] [-fall] [-min] [-max] transition_clock_list 命令指定时钟定义点处的时钟过渡时间。 例子: ● set_clock_transition -min 0.5 [...
set_clock_sense [-positive] [-negative] [-pulse pulse] [-stop_propagation] [-clock clock_list] pin_list 命令在引脚上设置时钟属性。 set_clock_transition [-rise] [-fall] [-min] [-max] transition_clock_list 命令指定时钟定义点处的时钟过渡时间。 例子: set_clock_transition -min 0.5 [get_...
create_generated_clock 需要指定源时钟(master clock)的master_pin,在CTS时,默认会去balance这两个时钟(即generated clock 和 master clock),让skew尽可能小。 而且在计算generated clock的clock latency时,会把从master clock pin 到generated clock pin之间的delay也考虑在内。
create_generated_clock使用-invert/-preinvert选项都表明generated clock与master clock相位相反,但这两个选项的区别是: preinvert : Creates a generated clock based on the inverted sense of the master clock. invert : Creates an inverted generated clock based on the non-inverted sense of the master cloc...
检查组合逻辑有没有反馈回路,STA对这种反馈回路是不会分析的,需要通过set_disable_timing来打断这种反馈回路 no_clock 检查是否有时序单元的clockpin不在任何时钟网络上,特别留意中途是不是通过“set_sense -stop_propagation”之类的命令强制切断了时钟的传播。
3.1. set_clock_groups 3.2. set_false_path 3.3. set_case_analysis 3.4. set_max_delay 1. Do not exist in timing fix sdc file: 1.1. Set_max_area 1.2. set_operation_conditions 1.3. set_wire_load_model 1.4. set_ideal_* 2. Must be placed in timing fix sdc file: ...
1.3. Set_driving_cell 1.4. Set_load 1.5. Set_fanout_load 1.6. Set_min_library 2. Set design constraints 2.1. Design rule constraints 2.2. Design optimization constraints 3. Other commands 3.1. set_clock_groups 3.2. set_false_path
1.4.Set_load 1.5.Set_fanout_load 1.6.Set_min_library 2.Set design constraints 2.1.Design rule constraints 2.1.1.Set_max_transition 2.1.2.Set_max_fanout 2.1.3.Set_max_capacitance 2.2.Design optimization constraints 2.2.1.Create_clock 2.2.2.create_generated_clock 2.2.3.Set_clock_latency 2.2...