sroute options for connecting power domain ring to power pad

Hi Deepak,

Have you tried using the GUI:
Route->Special Route
Enter the power net name
Select only the Pad Pin option
Set other options as desired

The core-facing pin of the IO cell needs to be defined as CLASS CORE.

- Kari

 Hi Kari,

   I have also tried the same way as you have told but did not work, as i wanted a list of pads to be connected to the power domain ring but as the pin names for all the pads were VDD & VSS i was not able to connect the list of selected pads alone using the sroute command,

  so we have to first clear all the golbal net connections & create the ring for the power domain with a different global net (VDD1 & VSS1 ) then define the globalnetconnect command with -pgpin option & specify the pin as VDD & then provide the list of instances (pad instance ) to be connected. 

    This is how it works now.

any way thanks for your suggestions

regards

deepak. 

 hi deepak,

I'm new in cadence tools and i  have the same problem and don't know how to lose it. Please can you send me your configuration's file, so that i can do the configuartion by my side?

Thanks,

 regards,

Eric

 Hi Eric,
    I am not sure about the configuration file your are asking about,

        I had some problem in connecting the power domain rings to a list of power pads (different source ), so what I did is,

    Listed all the instances of the pads that needs to be connected to the power domain ring,
    Defined the global nets for the tool to understand the logical connectivity (Power domain net names will be different to that of default domain net names)
    Used sroute command to connect the power ring to the selected power pad.


Example:
ClearGlobalNets
set power_nets {VDD1  VDD2}
set GND_nets {VSS1  VSS2 }

set pad_inst_VDD1 { __PAD_981  __PAD_1148 __PAD_1130 __PAD_1096 }
set pad_inst_VDD2 { __PAD_1004 __PAD_994 __PAD_967 __PAD_933 }
set pad_inst_VSS1 { __PAD_1156 __PAD_1155 __PAD_1133 __PAD_1132}
set pad_inst_VSS2 { __PAD_1005 __PAD_995 __PAD_966 __PAD_934 }

foreach i $pad_inst_VDD1  {
globalNetConnect [lindex $power_nets 0] -type pgpin -pin VDD -singleInstance $i
}
 
foreach i $pad_inst_VSS1  {
globalNetConnect [lindex $GND_nets 0] -type pgpin -pin VSS -singleInstance $i
}

sroute -deleteExistingRoutes -noBlockPins -noPadRings -noCorePins -noStripes -padPinAllGeomsConnect -padPinMinLayer 4 -padPinMaxLayer 4 -jogControl { preferWithChanges differentLayer } -nets {VDD1 VDD2 VSS1 VSS2}



        the above script will connect the list of instances to the defined global nets.

Regards
Deepak.