mentor ee drc的问题

hardy

exoedion中我在走线的时候由于drc的原因导致线无法走，如何将drc关闭。求教大神

simhfc

Editor Control > Common Settings > 取消 Interactive Place/Route DRC，会有提醒，选Yes。

hardy

simhfc 发表于 2013-6-20 15:02
3 I& e5 a9 |! dEditor Control > Common Settings > 取消 Interactive Place/Route DRC，会有提醒，选Yes。

我想再请教一个问题
/ V) a* s# T' \ddr的t形拓扑，ces中如何设置，如何查看其中adc adb dc db的长度。
（d是t点，a是cpu端。）先谢过了

simhfc

直接在CES里看啊，见图：
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* t& Z* f  w8 I1 N- Z1 zPCB单纯在PCB里，可以打开右键菜单 > Target Length/TOF Delay... > 选任一分支，Current下的就是。
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hardy

simhfc 发表于 2013-6-20 21:35
直接在CES里看啊，见图：

在ces中是不是只能在pin pair中查看不能在from to里面查看

simhfc

Fromto和Pin pair的含义不完全一致：
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The Difference Between From-Tos and Pin Pairs

Often times, from-to relationships can be confused with pin pair designations. To better understand these separate design attributes, please refer to the following definitions:
9 ~+ H5 t, v, x# k6 W •Net line ordering/from-tos - Ordered, physical pairings of component pins that instruct the router where to etch from and to when creating physical transmission lines (traces).
' x# K7 e4 p- \/ n •Pin pairs - Electrical pairings of component pins that are created for the purpose of defining electrical relationships between component pins in the form of constraints.
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; [, ]  G7 j/ j' D4 X3 ^. F只有定义了Pin pairs，才会生成虚拟节点(Virtual Pins)，也就是你说的T点——d，这样CES才能识别同一trace中的不同区段，才会显示各区段的长度；
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4 K7 d; }+ X- R9 P% B单纯定义From-to的话，即使实际走线是拓扑结构，CES只识别两个pin之间的trace长度，而忽略拓扑。

xw_superstar

simhfc 发表于 2013-6-22 00:38
" ?; F4 A$ \7 B" ]Fromto和Pin pair的含义不完全一致：
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0 _! S; q: g# i2 a$ DThe Difference Between From-Tos and Pin Pairs

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