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Special route problem in Encounter

Greatrebel

Hi all,

When I tried special routing, I got  a few warnings shown below.

 **WARN: (SOCSR-1253):   Net VDD does not have standard cells to be routed. Please check net list.
**WARN: (SOCSR-1254):   Net VDD does not have block pins to be routed. Please check net list.
**WARN: (SOCSR-1255):   Net VDD does not have pad pins to create pad ring. Please check net list or port class. (must NOT be CORE class and must not be AREAIO subclass).
**WARN: (SOCSR-1256):   Net VDD does not have CORE class pad pins to be routed.
        Please check net list or port class.
Net VDD does not have AREAIO class pad pins to be routed.
        Please check net list or port class.
**WARN: (SOCSR-1253):   Net VSS does not have standard cells to be routed. Please check net list.
**WARN: (SOCSR-1254):   Net VSS does not have block pins to be routed. Please check net list.
**WARN: (SOCSR-1255):   Net VSS does not have pad pins to create pad ring. Please check net list or port class. (must NOT be CORE class and must not be AREAIO subclass).
**WARN: (SOCSR-1256):   Net VSS does not have CORE class pad pins to be routed.
        Please check net list or port class.
Net VSS does not have AREAIO class pad pins to be routed.
        Please check net list or port class.
**WARN: (SOCSR-468):    No core cells defined in COMPONENTS section
 and/or   No core cells defined in SPECIALNETS VDD
**WARN: (SOCSR-468):    No core cells defined in COMPONENTS section
 and/or   No core cells defined in SPECIALNETS VDD
CPU time for FollowPin 0 seconds
**WARN: (SOCSR-468):    No core cells defined in COMPONENTS section
 and/or   No core cells defined in SPECIALNETS VSS
**WARN: (SOCSR-468):    No core cells defined in COMPONENTS section
 and/or   No core cells defined in SPECIALNETS VSS

  I do not know what's wrong with my netlist, but I found there were no VDD and VSS pin for every standard cell in netlist. Do these warnings mean that I need to add VDD and VSS pin for each standard cell?

 

Thanks in advanced

  •  It sounds like your global nets are not set up correctly. Look into the globalNetConnect command and make sure that sroute knows what needs to be connected to VDD/VSS. When you hover the mouse over a cell's pwr/gnd pin (with Q turned on), does it show the right net connection?

    If your std cells don't have vdd/vss pins, then I'm not sure what to tell you - sounds like they are not complete!

     

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