Cadence OrCAD PCB Designer
Cadence OrCAD PCB Designer Cadence OrCAD PCB Designer
Command Mapping Figure A-1 Allegro PCB Editor Toolbar Icons Show Element Show Measure Dehilight Waive DRC Color192 Xsection Dfa_Spreadsheet Place Manual Net Schedule Slide Spread Between Voids Custom Smooth Cns Show Hilight Highlight SOV Grid Toggle Shadow Toggle Cmgr Prmed Place Manual-H Add Connect Delay Tune Vertex Shape Void Element Shape Add Shape Edit Boundary Signal Model Ncdrill Legend Shape Add Circle Shape Void Rectangle Island Delete Signal Probe Ncdrill Customization Artwork Testprep Manual Reports Help Shape Select Shape Void Circle Shape Add Rect Shape Void Polygon Signal Library Signal Audit Odb Out Ncdrill Param Testprep Automatic Silkscreen Param Thieving Drc Update Dimension Linear Leader Diametral Generaledit Create Detail Dimension Angular Leader Radial Ifp Rplan Plan Rplan Toggle Bundle Edit Bundle Create Bundle Properties Rplan Commit Linefont Leader Only Leader Chamfer Autobundle Create Fanout Dimension Datum Leader Balloon Etchedit Bundle Delete Bundle Split Flow Default Rplan Status Bundle Toggle Figure 23. Toolbars in Allegro, taken from the Allegro PCB and Package Physical Layout Command The command Reference. mapping Not in all Table of A-1 the lists buttons the menu are available choices in that OrCAD can be PCB found Editor in the different and many provide modes functions (Layout and thatSymbol) I have not of Allegro described. PCB Editor. If you are running a different product in the Allegro family (for example, PCB Design 220), some commands listed here might not be available. (sptut) explains routing within SPECCTRA itself, for which the complete reference is Table Allegro A-1 Allegro PCB Router PCB Editor User Guide Command (spug). Mapping Menu • If Choice you know precisely which PCB Editor command Console is involved, Window there Command is a file for commands starting with each letter. They are called A Commands (acoms) to Z Commands (zcoms). The names of the commands are not always obvious, in which case the Allegro PCB and Package Physical Layout Command Reference (cmdrefmast) is the place to start. The new board wizard is under L (layout wizard), for instance, which confuses me repeatedly. Figure 23 for the toolbars is taken from this manual. June 2007 11 Product Version 16.0 48
B Power-user tips and random jottings This is a disorganised collection of techniques that I have found useful but seemed too complicated for the body of this handout (which is already far too long). B.1 Modes of operation I didn’t dwell on this in the instructions because we would all rather try out the software than read a lengthy ‘theory of operation’ but here is a little more. The main point is that the tools in PCB Editor can be used in two different ways (see page 23 of Getting Started with Physical Design for further details). • Menu-driven editing mode or verb–noun use model. In this mode you first choose a command, either from the menu bar or by clicking a button, then the design element on which the tool should operate. • Pre-selection mode or noun–verb use model. In this mode you first choose the object followed by the command, which is usually selected from the contextual menu by rightclicking. The verb–noun approach is a little more cumbersome but it is much easier to see what is happening, particularly if you keep the control panels open. For example, if you choose Add Connect, the Find panel automatically selects Pins, Vias and so on – the items to which a connection can be added. The Options displays the etch layers available and options for the tracks, such as width and angle of bends. If the Move command is selected instead, different options are offered and other classes are activated in Find. The noun–verb model is often more convenient when you know what you are doing and want to perform a set of operations on an object. However, there is a huge number of possible operations and they don’t all fit into a contextual menu. PCB Editor therefore has two Application Modes, which can be selected from the menu bar with Setup > Application Mode or with a button. These are the modes. • General Edit (GEN). This is the most useful mode and is intended for arranging components and adding connections. • Etch Edit (EE). This is mainly for editing tracks that have already been routed. The current mode is shown near the right-hand end of the status bar below the windows. The particular set of commands in the contextual menu depends on exactly what is selected. You may therefore need to adjust the Find control panel before you are able to select the desired element – a pin for Add Connect, for instance. Fancier versions of Allegro have a third mode for Flow Planning and there is an empty space on the button bar for it but it is not available to us. A Placement mode is due to be added soon. Use Setup > Application Mode > None to exit from the current application mode and return to a menu-driven editing mode (there is no button). No contextual menu is available and the Find control panel is deactivated until a tool or application mode is chosen again. If PCB Editor appears ‘dead’ there is probably no application mode selected. 49
- Page 1 and 2: Electronic Design Project 2 Cadence
- Page 3 and 4: The first two should be familiar fr
- Page 5 and 6: 2. The base-emitter junction of a t
- Page 7 and 8: • Select an Analog or Mixed A/D p
- Page 9 and 10: Figure 2. Gain as a function of fre
- Page 11 and 12: Capture Draw schematic PCB Editor S
- Page 13 and 14: 2. Choose Edit > Properties. . . fr
- Page 15 and 16: Figure 6. Completed dialogue box fo
- Page 17 and 18: Figure 7. Completed dialogue box fo
- Page 19 and 20: Figure 8. Screenshot of OrCAD PCB E
- Page 21 and 22: Figure 9. The Placement dialogue bo
- Page 23 and 24: • To rotate a selected component,
- Page 25 and 26: Hint for demonstrators. Some studen
- Page 27 and 28: • Usually the Plot scaling should
- Page 29 and 30: Table 2. Footprints for instrumenta
- Page 31 and 32: Figure 13. Constraint manager after
- Page 33 and 34: Figure 15. Screenshot of SPECCTRA,
- Page 35 and 36: Figure 17. My one-sided layout afte
- Page 37 and 38: Figure 18. Printout at actual size
- Page 39 and 40: • The pins of the integrated circ
- Page 41 and 42: in 2007-08, which was an electronic
- Page 43 and 44: Property Editor with Edit > Propert
- Page 45 and 46: 9 Summary: PCB design flow This lis
- Page 47: A Where to learn more The online he
- Page 51 and 52: Figure 24. Padstack editor settings
- Page 53 and 54: Figure 26. Screenshot and photomask
- Page 55 and 56: 3. The list on the right-hand side
- Page 57 and 58: • Our local allegro library doesn
B<br />
Power-user tips and random jottings<br />
This is a disorganised collection of techniques that I have found useful but seemed too complicated<br />
for the body of this handout (which is already far too long).<br />
B.1 Modes of operation<br />
I didn’t dwell on this in the instructions because we would all rather try out the software than<br />
read a lengthy ‘theory of operation’ but here is a little more. The main point is that the tools<br />
in <strong>PCB</strong> Editor can be used in two different ways (see page 23 of Getting Started with Physical<br />
Design for further details).<br />
• Menu-driven editing mode or verb–noun use model. In this mode you first choose a<br />
command, either from the menu bar or by clicking a button, then the design element on<br />
which the tool should operate.<br />
• Pre-selection mode or noun–verb use model. In this mode you first choose the object<br />
followed by the command, which is usually selected from the contextual menu by rightclicking.<br />
The verb–noun approach is a little more cumbersome but it is much easier to see what is happening,<br />
particularly if you keep the control panels open. For example, if you choose Add<br />
Connect, the Find panel automatically selects Pins, Vias and so on – the items to which a connection<br />
can be added. The Options displays the etch layers available and options for the tracks,<br />
such as width and angle of bends. If the Move command is selected instead, different options<br />
are offered and other classes are activated in Find.<br />
The noun–verb model is often more convenient when you know what you are doing and<br />
want to perform a set of operations on an object. However, there is a huge number of possible<br />
operations and they don’t all fit into a contextual menu. <strong>PCB</strong> Editor therefore has two Application<br />
Modes, which can be selected from the menu bar with Setup > Application Mode or with a<br />
button. These are the modes.<br />
• General Edit (GEN). This is the most useful mode and is intended for arranging components<br />
and adding connections.<br />
• Etch Edit (EE). This is mainly for editing tracks that have already been routed.<br />
The current mode is shown near the right-hand end of the status bar below the windows.<br />
The particular set of commands in the contextual menu depends on exactly what is selected.<br />
You may therefore need to adjust the Find control panel before you are able to select the desired<br />
element – a pin for Add Connect, for instance.<br />
Fancier versions of Allegro have a third mode for Flow Planning and there is an empty<br />
space on the button bar for it but it is not available to us. A Placement mode is due to be added<br />
soon.<br />
Use Setup > Application Mode > None to exit from the current application mode and return<br />
to a menu-driven editing mode (there is no button). No contextual menu is available and the<br />
Find control panel is deactivated until a tool or application mode is chosen again. If <strong>PCB</strong> Editor<br />
appears ‘dead’ there is probably no application mode selected.<br />
49
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