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Encounter Special Route fails (warning ENCSR-1254)

Hi,

I am new to P&R on Encounter. When I follow the step to Special Route, it shows the following warning and fails to route.

===========================================================

Begin power routing ...

**WARN: (ENCSR-1254): Net VDD does not have block pins to be routed. Please check net list.

**WARN: (ENCSR-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: (ENCSR-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: (ENCSR-1254): Net VSS does not have block pins to be routed. Please check net list.

**WARN: (ENCSR-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: (ENCSR-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.

Number of IO ports routed: 0

Number of Block ports routed: 0

Number of Stripe ports routed: 0

Number of Core ports routed: 0

Number of Pad ports routed: 0

Number of Power Bump ports routed: 0

====================================================

My netlist in verilog is:

=====================================================

module PRtest ( out, in );

output out;

input in;

NOT I0 ( net1, VSS, in, VDD);

NAND2 I1 ( net3, VSS, net1, net1, VDD);

NAND3 I2 ( out, VSS, net3, net3, net3, VDD);

endmodule

module NOT ( OUT, VSS, IN, VDD );

output OUT, VSS;

input IN, VDD;

endmodule

module NAND2 ( OUT, VSS, IN1, IN2, VDD );

output OUT, VSS;

input IN1, IN2, VDD;

endmodule

module NAND3 ( OUT, VSS, IN1, IN2, IN3, VDD );

output OUT, VSS;

input IN1, IN2, IN3, VDD;

endmodule

=================================================

Since there is not troubleshooting information in user manual or help library, I wish I can find some helps here. Thanks in advance.

Parents

bjbit over 13 years ago

Hi Brian,
Thanks a lot for your advice. Yes I have only 3 standard cells. By disabling other pin options, no more warning is reported. However, still no route generated.
==============================
Begin power routing ...
Number of Stripe ports routed: 0
Number of Core ports routed: 0
==============================
My Sroute setting is:
==============================
Begin option processing ...
(from .sroute_15140.conf) srouteConnectPowerBump set to false
(from .sroute_15140.conf) routeSelectNet set to "VSS VDD"
(from .sroute_15140.conf) routeSpecial set to true
(from .sroute_15140.conf) srouteConnectBlockPin set to false
(from .sroute_15140.conf) srouteConnectPadPin set to false
(from .sroute_15140.conf) srouteCrossoverViaTopLayer set to 6
(from .sroute_15140.conf) srouteFollowCorePinEnd set to 3
(from .sroute_15140.conf) srouteJogControl set to "preferWithChanges differentLayer"
(from .sroute_15140.conf) sroutePadPinAllPorts set to true
(from .sroute_15140.conf) sroutePreserveExistingRoutes set to true
(from .sroute_15140.conf) srouteTopLayerLimit set to 6
(from .sroute_15140.conf) srouteTopTargetLayerLimit set to 6
End option processing
================================
Any further advices for this problem? Thanks again.
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bjbit over 13 years ago

Hi Brian,
Thanks a lot for your advice. Yes I have only 3 standard cells. By disabling other pin options, no more warning is reported. However, still no route generated.
==============================
Begin power routing ...
Number of Stripe ports routed: 0
Number of Core ports routed: 0
==============================
My Sroute setting is:
==============================
Begin option processing ...
(from .sroute_15140.conf) srouteConnectPowerBump set to false
(from .sroute_15140.conf) routeSelectNet set to "VSS VDD"
(from .sroute_15140.conf) routeSpecial set to true
(from .sroute_15140.conf) srouteConnectBlockPin set to false
(from .sroute_15140.conf) srouteConnectPadPin set to false
(from .sroute_15140.conf) srouteCrossoverViaTopLayer set to 6
(from .sroute_15140.conf) srouteFollowCorePinEnd set to 3
(from .sroute_15140.conf) srouteJogControl set to "preferWithChanges differentLayer"
(from .sroute_15140.conf) sroutePadPinAllPorts set to true
(from .sroute_15140.conf) sroutePreserveExistingRoutes set to true
(from .sroute_15140.conf) srouteTopLayerLimit set to 6
(from .sroute_15140.conf) srouteTopTargetLayerLimit set to 6
End option processing
================================
Any further advices for this problem? Thanks again.
Cancel
Vote Up 0 Vote Down

Cancel

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