Differences

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--- orcad [2020/08/18 12:52] – created utedass
+++ orcad [2022/09/12 00:30] (current) – external edit 127.0.0.1
@@ Line 8: / Line 8: @@
 ===== Hotkeys =====
+[[http://ltodi.est.ips.pt/doe/pdf/layqrc.pdf|Quick reference]]
 <code>
@@ Line 33: / Line 34: @@
 S-y	Open the Layers spreadsheet
 </code>
+====== Behaviour ======
+===== Connectivity between nets =====
+<color #ff7f27>There seems to be some different behaviours on connections, depending on what types of cennectors that are present. In some unknown cases, two power connectors with the same name in the same desing are not connected to the same net. It seems to have something to do with hierarcical connectors with the same name being present but connected to something else. Maybe it is the graphical connection of the hierarcical connector that takes precedence over named power nets? </color>
+<color #ffc90e>Todo: Check priority on the resulting net names. If several different net names are graphically connected with wires, which net name/alias/power-net name decides the resulting net name when exported to Layout?</color>
+Connection matrix for connections with the same name.
+^ Type of connection ^ Same page ^ Same schematic ^ Same project ^
+^ Net alias | Yes | No | No |
+^ Off page connector | Yes | Yes | No |
+^ Hierarchical connector | Yes | Yes | No |
+^ Power connector | Yes | Yes | Yes |
+Same page
+^  ^ Net alias ^ Off page \\ connector ^ Hierarchical \\ connector ^ Power \\ connector ^
+^ Net alias					| X	| X	| X	| X	|
+^ Off page connector		| X	| X	| X	| X	|
+^ Hierarchical connector	| X	| X	| X	| X	|
+^ Power connector			| X	| X	| X	| X	|
+Same schematic
+^  ^ Net alias ^ Off page \\ connector ^ Hierarchical \\ connector ^ Power \\ connector ^
+^ Net alias					| -	| -	| -	| -	|
+^ Off page connector		| -	| X	| X	| -	|
+^ Hierarchical connector	| -	| X	| X	| -	|
+^ Power connector			| -	| -	| -	| X	|
+Same project
+^  ^ Net alias ^ Off page \\ connector ^ Hierarchical \\ connector ^ Power \\ connector ^
+^ Net alias					| -	| -	| -	| -	|
+^ Off page connector		| -	| -	| -	| -	|
+^ Hierarchical connector	| -	| -	| -	| -	|
+^ Power connector			| -	| -	| -	| X	|
+===== Misc =====
+Only parts from the root-schematic is exported to Layout. For ohter parts to be exported, they have to be included as hierarchical blocks in a schematic that has the root schematic as its ancestor.
+The same name for hierarchical block instances can be used in different schematics without colliding.
+Names are case insensitive regarding function. However, some functions seem to be confused by the case. For example, when having same but different cased names for hierarchical connnectors they appear as different connectors on the block, but are connected together anyway.
+A hierarchical block always lead to the oldest page in that schematic when descending the block.
+Thermal reliefs are not generated on pads that are smaller than the thermal relief width. That is, pads that have one dimension that is smaller than the "Options->Thermal Relief Settings..->Spoke width" will be consumed by a copper pour.