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SOC Encounter :: Layout Routing Issues

Sohaib Qazi

Hi

I am facing a problem with the layout generated by Encounter. I am unable to route the design properly. After setting up the Floorplan of the design when I place the Standard Cells, it also routes the metals and the metals are overlapped. Also it doesn't use the standard rules like using M1 Horizontal and M2 Vertical. I am not sure why it does so and how could I overcome this issue.

I am attaching a pic of the layout as well.

SOC Encounter Layout Issue

Parents

  •  

     I am unable tofigure out the problem. When I run the nanoRoute then I get an error and I am unable to get through this also 

     I get some Warnings and Errors,

    #WARNING (NRDB-318) MINIMUMCUT rule specifying 1 (<= 1) cuts for LAYER M1 is ignored
    #WARNING (NRDB-318) MINIMUMCUT rule specifying 1 (<= 1) cuts for LAYER M1 is ignored
    #WARNING (NRDB-318) MINIMUMCUT rule specifying 1 (<= 1) cuts for LAYER M2 is ignored
    #WARNING (NRDB-318) MINIMUMCUT rule specifying 1 (<= 1) cuts for LAYER M2 is ignored
    #WARNING (NRDB-318) MINIMUMCUT rule specifying 1 (<= 1) cuts for LAYER M3 is ignored
    #WARNING (EMS-27) Message (NRDB-318) has exceeded the current message display limit of 20.
    #To increase the message display limit, refer to the product command reference manual.
    #WARNING (NRDB-2005) SPECIAL_NET vdd has special wires but no definition for instance-pin connection. This will cause routability problems later.
    #WARNING (NRDB-2005) SPECIAL_NET gnd has special wires but no definition for instance-pin connection. This will cause routability problems later.
    #NanoRoute Version v10.10-p002 NR101202-1141/USR66-UB
    #WARNING (NREX-28) The height of the first routing layer M1 is 0.000000. It should be larger than 0.000000
    #WARNING (NREX-29) The metal thickness of routing layer M1 is 0.000000. It should be larger than 0.0. Add this to the technology information for better accuracy.
    #WARNING (NREX-30) Please also check the height and metal thickness values for the routing layers heigher than routing layer M1
    #WARNING (NREX-4) No Extended Cap Table was imported. Not enough process information was provided either and default Extended Cap Table database will be used.
    #WARNING (NRDB-2040) Rule LEF_DEFAULT doesn't specify any vias that satisfy a minimum area rule on M2 M3 M4 M5 M6 M7
    #WARNING (NRDB-778) No multicut vias are defined for LAYER M1 in RULE LEF_DEFAULT. When a LEF MINIMUMCUT rule is defined for a layer, you must define multicut vias for the layer in the LEF file. Edit your LEF file and read it in again.
    #WARNING (NRDB-778) No multicut vias are defined for LAYER M2 in RULE LEF_DEFAULT. When a LEF MINIMUMCUT rule is defined for a layer, you must define multicut vias for the layer in the LEF file. Edit your LEF file and read it in again.
    #WARNING (NRDB-778) No multicut vias are defined for LAYER M3 in RULE LEF_DEFAULT. When a LEF MINIMUMCUT rule is defined for a layer, you must define multicut vias for the layer in the LEF file. Edit your LEF file and read it in again.
    #WARNING (NRDB-778) No multicut vias are defined for LAYER M4 in RULE LEF_DEFAULT. When a LEF MINIMUMCUT rule is defined for a layer, you must define multicut vias for the layer in the LEF file. Edit your LEF file and read it in again.
    #WARNING (EMS-27) Message (NRDB-778) has exceeded the current message display limit of 20.
    #To increase the message display limit, refer to the product command reference manual.
    #WARNING (NRDB-2040) Rule virtuosoDefaultSetup doesn't specify any vias that satisfy a minimum area rule on M2 M3 M4 M6
    # M1           H   Track-Pitch = 10.000    Line-2-Via Pitch = 0.180
    # M2           V   Track-Pitch = 10.000    Line-2-Via Pitch = 0.200
    # M3           H   Track-Pitch = 10.000    Line-2-Via Pitch = 0.200
    # M4           V   Track-Pitch = 10.000    Line-2-Via Pitch = 0.200
    # M5           H   Track-Pitch = 10.000    Line-2-Via Pitch = 0.200
    # M6           V   Track-Pitch = 10.000    Line-2-Via Pitch = 0.800
    # M7           H   Track-Pitch = 10.000    Line-2-Via Pitch = 0.800
    # AP           V   Track-Pitch = 10.000    Line-2-Via Pitch = 5.000
    #ERROR (NRDB-158) There is no default via from LAYER M1 to LAYER M2 in RULE LEF_DEFAULT.
    #Cpu time = 00:00:01
    #Elapsed time = 00:00:01
    #Increased memory = 1.00 (Mb)
    #Total memory = 308.00 (Mb)
    #Peak memory = 342.00 (Mb)
    #WARNING (NRIF-19) Fail to complete globalDetailRoute on Tue Feb 14 14:30:07 2012

    How can I resolve this issue ????

Reply

  •  

     I am unable tofigure out the problem. When I run the nanoRoute then I get an error and I am unable to get through this also 

     I get some Warnings and Errors,

    #WARNING (NRDB-318) MINIMUMCUT rule specifying 1 (<= 1) cuts for LAYER M1 is ignored
    #WARNING (NRDB-318) MINIMUMCUT rule specifying 1 (<= 1) cuts for LAYER M1 is ignored
    #WARNING (NRDB-318) MINIMUMCUT rule specifying 1 (<= 1) cuts for LAYER M2 is ignored
    #WARNING (NRDB-318) MINIMUMCUT rule specifying 1 (<= 1) cuts for LAYER M2 is ignored
    #WARNING (NRDB-318) MINIMUMCUT rule specifying 1 (<= 1) cuts for LAYER M3 is ignored
    #WARNING (EMS-27) Message (NRDB-318) has exceeded the current message display limit of 20.
    #To increase the message display limit, refer to the product command reference manual.
    #WARNING (NRDB-2005) SPECIAL_NET vdd has special wires but no definition for instance-pin connection. This will cause routability problems later.
    #WARNING (NRDB-2005) SPECIAL_NET gnd has special wires but no definition for instance-pin connection. This will cause routability problems later.
    #NanoRoute Version v10.10-p002 NR101202-1141/USR66-UB
    #WARNING (NREX-28) The height of the first routing layer M1 is 0.000000. It should be larger than 0.000000
    #WARNING (NREX-29) The metal thickness of routing layer M1 is 0.000000. It should be larger than 0.0. Add this to the technology information for better accuracy.
    #WARNING (NREX-30) Please also check the height and metal thickness values for the routing layers heigher than routing layer M1
    #WARNING (NREX-4) No Extended Cap Table was imported. Not enough process information was provided either and default Extended Cap Table database will be used.
    #WARNING (NRDB-2040) Rule LEF_DEFAULT doesn't specify any vias that satisfy a minimum area rule on M2 M3 M4 M5 M6 M7
    #WARNING (NRDB-778) No multicut vias are defined for LAYER M1 in RULE LEF_DEFAULT. When a LEF MINIMUMCUT rule is defined for a layer, you must define multicut vias for the layer in the LEF file. Edit your LEF file and read it in again.
    #WARNING (NRDB-778) No multicut vias are defined for LAYER M2 in RULE LEF_DEFAULT. When a LEF MINIMUMCUT rule is defined for a layer, you must define multicut vias for the layer in the LEF file. Edit your LEF file and read it in again.
    #WARNING (NRDB-778) No multicut vias are defined for LAYER M3 in RULE LEF_DEFAULT. When a LEF MINIMUMCUT rule is defined for a layer, you must define multicut vias for the layer in the LEF file. Edit your LEF file and read it in again.
    #WARNING (NRDB-778) No multicut vias are defined for LAYER M4 in RULE LEF_DEFAULT. When a LEF MINIMUMCUT rule is defined for a layer, you must define multicut vias for the layer in the LEF file. Edit your LEF file and read it in again.
    #WARNING (EMS-27) Message (NRDB-778) has exceeded the current message display limit of 20.
    #To increase the message display limit, refer to the product command reference manual.
    #WARNING (NRDB-2040) Rule virtuosoDefaultSetup doesn't specify any vias that satisfy a minimum area rule on M2 M3 M4 M6
    # M1           H   Track-Pitch = 10.000    Line-2-Via Pitch = 0.180
    # M2           V   Track-Pitch = 10.000    Line-2-Via Pitch = 0.200
    # M3           H   Track-Pitch = 10.000    Line-2-Via Pitch = 0.200
    # M4           V   Track-Pitch = 10.000    Line-2-Via Pitch = 0.200
    # M5           H   Track-Pitch = 10.000    Line-2-Via Pitch = 0.200
    # M6           V   Track-Pitch = 10.000    Line-2-Via Pitch = 0.800
    # M7           H   Track-Pitch = 10.000    Line-2-Via Pitch = 0.800
    # AP           V   Track-Pitch = 10.000    Line-2-Via Pitch = 5.000
    #ERROR (NRDB-158) There is no default via from LAYER M1 to LAYER M2 in RULE LEF_DEFAULT.
    #Cpu time = 00:00:01
    #Elapsed time = 00:00:01
    #Increased memory = 1.00 (Mb)
    #Total memory = 308.00 (Mb)
    #Peak memory = 342.00 (Mb)
    #WARNING (NRIF-19) Fail to complete globalDetailRoute on Tue Feb 14 14:30:07 2012

    How can I resolve this issue ????

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