create_cell{vss_l vss_r vss_t vss_b}io_lib/pv0icreate_cell{vdd_l vdd_r vdd_t vdd_b}io_lib/pvdicreate_cell{CornerLL CornerLR CornerTR CornerTL}io_lib/pfrelr 1 2 3 读入IO约束文件 在LayoutWindow的菜单栏中依次选择“Floorplan”→“Read Pin/Pad Physical Constraints”,在栏中填写前边准...
connect_pin, copy_objects, create_cell, create_edit_group, create_net, create_net_shape, create_pg_network, create_physical_buses_from_patterns, create_pin_guide, create_placement_blockage, create_port, create_route_guide, create_terminal, create_text, create_user_shape, create_via, cut_objec...
When you specify -off_edge auto, you must create a pin guide that is associated with this pin. The pin guide must be in the center of the block boundary. The pin is placed at the optimal position guided by the pin guide. If you do not provide a pin guide, the pins are placed in...
create_placement_blockage:不允许在指定区域摆放指定cell。 create_bounds:在指定区域摆放指定cell。 create_route_guide / create_routing_blockage 在Floorplan就指定Route相关设置的原因是,可能会虚拟走线计算时序等信息,所以需要提前把Route相关设置好。(
create_place_blockage和create_route_guide来完成blockage的设置。 接着设置在Design Planning的task任务下,进行place macros和standcells。或者使用create_fp_placement –timing_driven –no_hierarchy_gravity 设置完macro和standcell之后,就可以进行电源规划了,可以通过产生power_ring或power_strap来进行。create_power_...
SPG:synopsys physical guidence Congestion-Focused Setup Steps density: 密度 QoR主要分为三部分:Congestion/Timing/Power Congestion 跑完place_opt后先分析congestion和cell/pin density 如果有拥堵问题的话,可以使用以下方法去解决congestion Timing Power/Area ...
ICC后端面试题
选择Manuel connection,依次命名Power net,Power pin,Ground net,Ground pin为VDD和VSS,Create port选择Top 此步骤完成后芯片预览图不会更新,但在Shell中会打印成功连接电源的信息 4.创建电流环 Preroute ---> Create Rings Nets中填写VDD VSS,Horizontal为水平布线,层数选择为第五层金属(METAL5),Vertical为垂直布线...
当出现这样的问题我们可以使用Stamp模型来解决或者使用virtual clock旁通clkbuf(create_clock name VCLK p 2 w 0 1 find(pin,U49/NQ)set_clock_latancy 0.2 source VCLKset_ideal_net find(net,VCLK)。在时序分析中,经常会检查setup/hold、removal/recovery和min pulse width。然而有些会是untested。这 31、...
If the logic libraries contain a mixture of both NLDM and CCS models, by default, the tool uses the CCS capacitance and timing data; you can control this by setting the lib_pin_using_cap_from_ccs and lib_cell_using_delay_from_ccs variables before loading the libraries. The link libraries...