ICC后带寄生用PT进行STA,min_capacitance违例需要修改吗?求大神解疑,急!
Report : constraint
-all_violators
-path slack_only
Design : Digital
Version: C-2009.06-SP3
Date: Mon Jun 13 16:05:47 2016
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min_capacitance
RequiredActual
PinCapacitanceCapacitanceSlack
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uut_filter/M5/C1/buffda_G1B1I808/Z
0.040.030.00(VIOLATED: increase significant digits)
uut_spi_slave/U527/ZN0.000.000.00(VIOLATED: increase significant digits)
uut_spi_slave/U528/ZN0.000.000.00(VIOLATED: increase significant digits)
uut_spi_slave/U529/ZN0.000.000.00(VIOLATED: increase significant digits)
uut_spi_slave/U530/ZN0.000.000.00(VIOLATED: increase significant digits)
uut_spi_slave/U531/ZN0.000.000.00(VIOLATED: increase significant digits)
uut_spi_slave/U532/ZN0.000.000.00(VIOLATED: increase significant digits)
uut_spi_slave/U533/ZN0.000.000.00(VIOLATED: increase significant digits)
uut_spi_slave/U534/ZN0.000.000.00(VIOLATED: increase significant digits)
uut_spi_slave/U535/ZN0.000.000.00(VIOLATED: increase significant digits)
uut_spi_slave/U536/ZN0.000.000.00(VIOLATED: increase significant digits)
uut_spi_slave/U537/ZN0.000.000.00(VIOLATED: increase significant digits)
uut_filter/M5/C1/U38/CN0.010.010.00(VIOLATED: increase significant digits)
uut_filter/CTS_clk_in_delay3/Z
0.020.010.00(VIOLATED: increase significant digits)
uut_filter/M4/B1/U58/CN0.010.010.00(VIOLATED: increase significant digits)
uut_filter/M4/B1/U83/CN0.010.010.00(VIOLATED: increase significant digits)
uut_filter/M5/C1/U114/CN0.010.010.00(VIOLATED: increase significant digits)
uut_filter/M7/U14/Z0.010.010.00(VIOLATED: increase significant digits)
uut_filter/M7/U47/Z0.010.010.00(VIOLATED: increase significant digits)
uut_filter/M3/A2/dout_tem_reg[13]/Q
0.010.010.00(VIOLATED: increase significant digits)
uut_filter/M7/CTS_clk_in_delay10/Z
0.050.050.00(VIOLATED: increase significant digits)
uut_filter/M4/B1/a2_reg[18]/Q
0.010.010.00(MET)
RTL设计中有173个float点,使用矩形图检查min_capacitance时,图形如下:
目前已经把单元尺寸可以改小的改小了,插入buffer并没有效果(以前的单元pin无违例,其后加入的buffer输出端违例)。如果需要修复这类违例,有什么方法可以不需要重新在ICC中进行CTS,直接在route阶段就可以修复此类违例的吗?求大神解疑
急急急
输出端cap违例, 可以size_cell,或者fanout过大,调整fanout
cell已经是最小的了,如果换成较大的cell,min_cap反而会加大
急急急急!跪求各位大神解疑
fanout过大吧?set_max_fanout