Design Compiler再了解(三十一)

Specifying Wire Loads

首先要知道在library中有哪些wire load model可用
使用 report_lib fast ; ##使用0.18的fast library

得到
Wire Loading Model:

Name : tsmc18_wl10
Location : fast
Resistance : 8.5e-08
Capacitance : 0.00015
Area : 0.7
Slope : 66.667
Fanout Length Points Average Cap Std Deviation
--------------------------------------------------------------
1 66.67

Name : tsmc18_wl20
Location : fast
Resistance : 8.5e-08
Capacitance : 0.00015
Area : 0.7
Slope : 133.334
Fanout Length Points Average Cap Std Deviation
--------------------------------------------------------------
1 133.33

Name : tsmc18_wl30
Location : fast
Resistance : 8.5e-08
Capacitance : 0.00015
Area : 0.7
Slope : 200.001
Fanout Length Points Average Cap Std Deviation
--------------------------------------------------------------
1 200.00

Name : tsmc18_wl40
Location : fast
Resistance : 8.5e-08
Capacitance : 0.00015
Area : 0.7
Slope : 266.668
Fanout Length Points Average Cap Std Deviation
--------------------------------------------------------------
1 266.67

Name : tsmc18_wl50
Location : fast
Resistance : 8.5e-08
Capacitance : 0.00015
Area : 0.7
Slope : 333.335
Fanout Length Points Average Cap Std Deviation
--------------------------------------------------------------
1 333.33

Name : ForQA
Location : fast
Resistance : 0
Capacitance : 1
Area : 1
Slope : 1
Fanout Length Points Average Cap Std Deviation
--------------------------------------------------------------
1 0.00
10 0.00


然後我們選擇最後一個
使用 get_attribute fast ForQA