留言板

荒何 2023-11-8 10:36: voiluce: 抱歉刚刚才看到。

这个是clock path 上的logic path 不唯一，需要在合适的mux 加上 case analysis
多谢，再麻烦问下，这个具体该怎么加呢

荒何 2023-11-3 15:37: 博主，请问下我在综合的时候出现了好多这样的警告，这个该怎么解决呀？我忽略掉布局布线完lvs出现了好多浮空线和端口的问题，是不是这个问题导致的呢？
Warning: A non-unate path in clock network for clock 'module_mode0_inst_tb_clk_9'
from pin 'module_mode0_inst_tb/mode0_clk_gen_inst/U86/Z' is detected. (TIM-052)
Warning: A non-unate path in clock network for clock 'module_mode0_inst_tb_clk_9'
from pin 'module_mode0_inst_tb/mode0_clk_gen_inst/U86/Z' is detected. (TIM-052)
Warning: A non-unate path in clock network for clock 'module_mode0_inst_tb_clk_9'
from pin 'module_mode0_inst_tb/mode0_clk_gen_inst/U86/Z' is detected. (TIM-052)

荒何 2023-9-13 17:26: 博主，我这是tcbwp7t的库，请问下我在创建power straps时，用的命令是
create_power_straps -direction vertical \
                  -configure step_and_stop \
                  -nets {VDD VSS} \
                  -layer METAL4 \
                  -width 1.5 \
                  -start_at 15 -step 30 -stop ${core_urx} -pitch_within_group 1.8 \
                  -ignore_parallel_targets \
                  -keep_floating_wire_pieces
然后出现了好多blockage的警告，Warning: wire dropped because obstruction, ((196.250 4.975) (197.670 5.255)) (Net: VSS) (Layer: METAL3 [28]) is blocked by ((3.500 3.500) (246.180 5.000)) (Net: VDD) (Layer: METAL3 [28]). (PGRT-030)
Warning: wire dropped because obstruction, ((224.375 244.045) (225.625 245.295)) (Net: VDD) (Layer: METAL3 [28]) is blocked by ((224.375 243.850) (225.625 244.390)) (Net: VDD) (Layer: METAL3 [28]). (PGRT-030)
Warning: wire dropped because obstruction, ((226.250 4.975) (227.670 5.255)) (Net: VSS) (Layer: METAL3 [28]) is blocked by ((3.500 3.500) (246.180 5.000)) (Net: VDD) (Layer: METAL3 [28]). (PGRT-030)
类似这样的警告，请问下这样该怎么处理呢

荒何 2023-4-21 19:52: 请问博主，我在dc综合时，出现了好多这样的警告我、提示没有驱动线和负载，这些问题该怎么处理？另外警告中提到的C891这个名字对应的cell是什么，该怎么去查看？
Warning: In design 'cic_filter_1_z__1_7', cell 'C891' does not drive any nets. (LINT-1)

Warning: In design 'cic_filter_top', net 'u_cic_filter_mode0/filter_node4[48]' driven by pin 'u_cic_filter_mode0/u_cic_filter_hr_1/y_o[48]' has no loads. (LINT-2)

voiluce