mentor ee drc的问题

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

我想再请教一个问题
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

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

Fromto和Pin pair的含义不完全一致：
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:
•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).
•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.
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；
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。