oAwad
Full Member level 2
I'm using Nangate Open Cell Library 45nm for my design. I have been trying to translate my design from Encounter to Virtuoso for a couple of days but with no success and there are no documentations available for this library.
Here are my steps:
**Exporting my design as GDSII in Encounter
1) I didn't find a map file in Nangate 45nm library to attach it in GDS export window. I only can find a technology file (path: Back_End->virtuoso->technology.tf)
please tell me what should I do with this file
2) In "Library name" field, I wrote "NangateOpenCellLibrary" which is the library Nangate is providing for virtuoso (I later import this library in my cadence virtuoso). This library has the abstract, functional, layout, schematic and symbol for every std cell.
3) In "Merge Files" field, I specify path for "Back_End->gds->NangateOpenCellLibrary.gds".
That's all what I do in exporting GDS from Encounter.
Then I streamIn GDS in Virtuoso, so here are my steps:
1) import Nangate library for Virtuoso, so I go CIW->Tools->Library Path Editor
2) File-> import ->StreamIN....then I specify the GDS file path and set Library to "NangateOpenCellLibrary" and specify my top level cell and at last load ASCII Tech File (I load the technology file that I uploaded its code previously).
Then hit translate.
When I open my layout, I can see not all layers are translated and I don't know how to check for the FILLER cells, so attached the following screenshot maybe you can help me.
Also I can see in the LSW window many other layers than the standard 10 layers that I used in Encounter.
The last point I want the layout in Virtuoso to appear like the layout in Encounter (layer colors), how to do that ?
Please if anyone has experience who can help, I would be more than grateful.
Here are my steps:
**Exporting my design as GDSII in Encounter
1) I didn't find a map file in Nangate 45nm library to attach it in GDS export window. I only can find a technology file (path: Back_End->virtuoso->technology.tf)
Code:
; Technology File NCSU FreePDK 45nm
;********************************
; LAYER DEFINITION
;********************************
layerDefinitions(
techLayers(
;( LayerName Layer# Abbreviation )
;( --------- ------ ------------ )
( IP 63 IP )
( nwell 3 nwell )
( pwell 2 pwell )
( nimplant 4 nimplant )
( pimplant 5 pimplant )
( active 1 active )
( vtg 6 vtg )
( vth 7 vth )
( thkox 8 thkox )
( poly 9 poly )
( contact 10 contact )
( metal1 11 metal1 )
( via1 12 via1 )
( metal2 13 metal2 )
( via2 14 via2 )
( metal3 15 metal3 )
( via3 16 via3 )
( metal4 17 metal4 )
( via4 18 via4 )
( metal5 19 metal5 )
( via5 20 via5 )
( metal6 21 metal6 )
( via6 22 via6 )
( metal7 23 metal7 )
( via7 24 via7 )
( metal8 25 metal8 )
( via8 26 via8 )
( metal9 27 metal9 )
( via9 28 via9 )
( metal10 29 metal10 )
( DRC 400 DRC )
) ;techLayers
techLayerPurposePriorities(
;layers are ordered from lowest to highest priority
;( LayerName Purpose )
;( --------- ------- )
( IP drawing )
( nwell drawing )
( pwell drawing )
( nimplant drawing )
( pimplant drawing )
( active drawing )
( vtg drawing )
( vth drawing )
( thkox drawing )
( poly drawing )
( contact drawing )
( metal1 drawing )
( via1 drawing )
( metal2 drawing )
( via2 drawing )
( metal3 drawing )
( via3 drawing )
( metal4 drawing )
( via4 drawing )
( metal5 drawing )
( via5 drawing )
( metal6 drawing )
( via6 drawing )
( metal7 drawing )
( via7 drawing )
( metal8 drawing )
( via8 drawing )
( metal9 drawing )
( via9 drawing )
( metal10 drawing )
( DRC drawing )
) ;techLayerPurposePriorities
techDisplays(
;( LayerName Purpose Packet Vis Sel Con2ChgLy DrgEnbl Valid )
;( --------- ------- ------ --- --- --------- ------- ----- )
( IP drawing PacketName_0 t t t t t )
( nwell drawing PacketName_2 t t t t t )
( pwell drawing PacketName_3 t t t t t )
( nimplant drawing PacketName_4 t t t t t )
( pimplant drawing PacketName_5 t t t t t )
( active drawing PacketName_6 t t t t t )
( vtg drawing PacketName_11 t t t t t )
( vth drawing PacketName_12 t t t t t )
( thkox drawing PacketName_13 t t t t t )
( poly drawing PacketName_14 t t t t t )
( contact drawing PacketName_19 t t t t t )
( metal1 drawing PacketName_26 t t t t t )
( via1 drawing PacketName_30 t t t t t )
( metal2 drawing PacketName_31 t t t t t )
( via2 drawing PacketName_35 t t t t t )
( metal3 drawing PacketName_36 t t t t t )
( via3 drawing PacketName_40 t t t t t )
( metal4 drawing PacketName_41 t t t t t )
( via4 drawing PacketName_45 t t t t t )
( metal5 drawing PacketName_46 t t t t t )
( via5 drawing PacketName_50 t t t t t )
( metal6 drawing PacketName_51 t t t t t )
( via6 drawing PacketName_55 t t t t t )
( metal7 drawing PacketName_56 t t t t t )
( via7 drawing PacketName_60 t t t t t )
( metal8 drawing PacketName_61 t t t t t )
( via8 drawing PacketName_65 t t t t t )
( metal9 drawing PacketName_66 t t t t t )
( via9 drawing PacketName_70 t t t t t )
( metal10 drawing PacketName_71 t t t t t )
( DRC drawing PacketName_77 t t t t t )
) ;techDisplays
) ;layerDefinitions2) In "Library name" field, I wrote "NangateOpenCellLibrary" which is the library Nangate is providing for virtuoso (I later import this library in my cadence virtuoso). This library has the abstract, functional, layout, schematic and symbol for every std cell.
3) In "Merge Files" field, I specify path for "Back_End->gds->NangateOpenCellLibrary.gds".
That's all what I do in exporting GDS from Encounter.
Then I streamIn GDS in Virtuoso, so here are my steps:
1) import Nangate library for Virtuoso, so I go CIW->Tools->Library Path Editor
2) File-> import ->StreamIN....then I specify the GDS file path and set Library to "NangateOpenCellLibrary" and specify my top level cell and at last load ASCII Tech File (I load the technology file that I uploaded its code previously).
Then hit translate.
When I open my layout, I can see not all layers are translated and I don't know how to check for the FILLER cells, so attached the following screenshot maybe you can help me.
Also I can see in the LSW window many other layers than the standard 10 layers that I used in Encounter.
The last point I want the layout in Virtuoso to appear like the layout in Encounter (layer colors), how to do that ?
Please if anyone has experience who can help, I would be more than grateful.
