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FlowCAD Constraint Manager Tips and Tricks www.FlowCAD.ch www.FlowCAD.de FlowCAD Webinar FlowCAD • • • • • • • • Constraint Manager Basic Physical Constraints Spacing Constraints Analysis Mode Differential Pair Total Etch length Constraint Regions This & That www.FlowCAD.ch www.FlowCAD.de Overview FlowCAD Constraint Manager Clearly arranged in different categories All the constraints are defined in one place Constraints can be reused Online Design Rule Check (DRC) Scalable for all future needs The defined constraints are used by the auto router www.FlowCAD.ch www.FlowCAD.de • • • • • • FlowCAD Constraint Manager Because the Constraint Manager is scalable within the different tiers, you may have more rules which can be set Don’t worry, the process is always the same www.FlowCAD.ch www.FlowCAD.de This presentation is based on a OrCAD PCB Professional 16.5 license FlowCAD The constraints are separated in different categories: - Electrical - Physical - Spacing - Same Net Spacing - Properties - DRC (Design Rule Check) www.FlowCAD.ch www.FlowCAD.de Constraint Manager Basic FlowCAD Constraint Manager Basic Some categories contains as well: - Regions, for region rules - Net Class, for Net class to net class rules www.FlowCAD.ch www.FlowCAD.de Each category contains two main folders: - A Constraint set with the different parameters which can be set - A list of all nets in the design FlowCAD Constraint Manager Basic www.FlowCAD.ch www.FlowCAD.de Function of the Constraint Manager: - Define a constraint - Associate the constraint to a net - Route the design - When a rule is not maintained, an Error will be displayed “a DRC Marker appear” FlowCAD Constraint Manager Example www.FlowCAD.ch www.FlowCAD.de Each net has the DEFAULT constraint set associated How to define a user defined line width on a specific net: - The Sense net needs a minimum line width of 0.2mm FlowCAD Constraint Manager Example There are two ways to define constraints First we show how to define constraints for one single net by the “override” method www.FlowCAD.ch www.FlowCAD.de For the “sense” net, the line width is changed to 0.2000mm Each value which was changed manually, change the font color to blue and get’s bold: FlowCAD Constraint Manager Example The second method is to create a constraint set This rule set can be associated to a net or to a class of nets www.FlowCAD.ch www.FlowCAD.de To create a constraint set, select in the left panel the “Physcial Constraint Set” Folder FlowCAD Constraint Regions www.FlowCAD.ch www.FlowCAD.de • Use the add shape command to design a new constraint region • Define “Constraint region” as class • Chose the desired subclass to define on which layer the region should be placed • Define a name for the region • Draw the region on your PCB FlowCAD Constraint Regions www.FlowCAD.ch www.FlowCAD.de • Create a physical constraint set FlowCAD Constraint Regions • Assign constraint set to the region www.FlowCAD.ch www.FlowCAD.de • Define the physical constraints in the BGA_DEMO constraint set as desired: FlowCAD Properties Worksheet www.FlowCAD.ch www.FlowCAD.de • For each net different properties can be set • Example: When the “No Rat“ property is set to on, no ratnet is displayed for this specific net FlowCAD Properties Worksheet www.FlowCAD.ch www.FlowCAD.de • A lot of Component and Pin properties can be set in this Worksheet • Example: For each pin, the thermal connection within a shape can be defined manually FlowCAD DRC Worksheet www.FlowCAD.ch www.FlowCAD.de • Each DRC is listed separately • Each DRC can be waived, selected in this table in the right mouse button menu FlowCAD Filter Options www.FlowCAD.ch www.FlowCAD.de When you’re searching a special net or pin just enter the name in the field marked with an * in the top row FlowCAD Colouring nets are marked in CMGR Colouring nets in the color dialog: www.FlowCAD.ch www.FlowCAD.de Net is marked in the Constraint Manager: FlowCAD Searching a net on the board www.FlowCAD.ch www.FlowCAD.de When selecting a net chose the “Select and Show Element” command in the right mouse button The net will be highlighted FlowCAD Searching a net in the CMGR www.FlowCAD.ch www.FlowCAD.de When selecting a net in the layout and the constraint manager is open, the net is automatically selected FlowCAD How to change the value in an entire row? When selecting a net in the layout and the constraint manager is open, the net is automatically selected 2.Change one value and all the selected field gets the same value 3.All the value are changed www.FlowCAD.ch www.FlowCAD.de 1.Select one entire row: FlowCAD Constraint “Reuse” • Define a board template with your desired colors, layers and basic constraints www.FlowCAD.ch www.FlowCAD.de • Constraints can be exportet/imported in the Constraint Manager: FlowCAD Outlook • For more detailed information, please look at the Allegro Constraint Manager User Guide or contact FlowCAD www.FlowCAD.ch www.FlowCAD.de • The constraint Manager is really powerful You can use it to define relative propagation delay, control wires topology ( ex Daisy chain), and much more Requires Allegro PCB Designer License! • You can even define your own formulas in the constraint manager! Requires Allegro PCB Designer License! FlowCAD Ende Für Fragen, Anregungen oder Bemerkungen erreichen Sie mich unter: Tel.: E-Mail: + 41 (0) 56 485 91 91 support@flowcad.ch www.FlowCAD.ch www.FlowCAD.de Besten Dank für Ihre Teilnahme und für Ihr Interesse! www.FlowCAD.ch www.FlowCAD.de FlowCAD ...FlowCAD • • • • • • • • Constraint Manager Basic Physical Constraints Spacing Constraints Analysis Mode Differential Pair Total Etch length Constraint Regions This & That www.FlowCAD.ch... all future needs The defined constraints are used by the auto router www.FlowCAD.ch www.FlowCAD.de • • • • • • FlowCAD Constraint Manager Because the Constraint Manager is scalable within the... A Constraint set with the different parameters which can be set - A list of all nets in the design FlowCAD Constraint Manager Basic www.FlowCAD.ch www.FlowCAD.de Function of the Constraint Manager: