Consider a std cell as a macro to do sroute

 SRoute also routes std cell pwr/gnd rails, sometimes called "followpins". Your multi-height cell shouldn't be a problem, as long as its power rails line up with the single-height cells in the rows. In the SRoute GUI form, it's the "Standard Cell Pins" option that you want. If you're using the sroute command, check the Text Command Reference. Post back if you're still having trouble.

HI Kari,

The std cell, of which I was referring to, has one input which is of different domain of the followpins and instance pins, which is at the buffer need to be connected as power supply to 50 more buffers which is of normal height.

May you could tell me, how to treat the power nets as normal signal, so that I can route it in nanoroute. By assigning them net weights.

Regards

Lohith

 In that case, you may need the command routePGPinUseSignalRoute. Check the text command reference for details.

Hi Kari,

Thanks for the command, It helped me for my design. 

How can set the custom width for the metal layers that it chooses to route, for the usage of command routePGPinUseSignalRoute. And also i need to know if we have any commnad which routes only the specif signal/Signals.

Thanks & Regards  

 Hi,

Glad things are going better! You'll see that the routePGPinUseSignalRoute command has a -nonDefaultRule option, so you could provide a NONDEFAULT rule if you want these nets routed in something other than the default width. If you don't already have NONDEFAULT rules in your tech lef, see the following blog post for more info:

http://www.cadence.com/Community/blogs/di/archive/2010/09/22/five-minute-tutorial-creating-a-nondefault-rule.aspx

As for routing specific nets in general, nanoRoute can do that. You can select the nets you want to route, and use setNanoRouteMode -routeSelectedNetOnly true. You can also do this through the GUI.

- Kari