《CB设计的整体流程》PPT课件.ppt

,第3节 PCB设计的整体流程, QQ群： 17027510 北方科技,课件密码：25446358,,PCB design process,,Transferring design information to the PCB,,Resolving synchronization errors,Missing component footprints. Footprint pin numbers not matched to schematic pin numbers. Components not matching (Figure 4). To resolve errors, perform a Show Differences, then in the Differences dialog click the Explore Differences button.,,PCB Panel :PCB PCB Browse mode selection list Components (and then Component Classes) Nets (and then Net Classes) From-To Editor Split planes Design rules & design rule violations. Differential pairs Polygons Hole sizes,Using the PCB Panel,,Project Navigation and Cross Probing,Navigation 这里要是看不到的时候可以右键 compile all,,Cross probing,Cross probing from the schematic to the PCB Split verticle / merge all,,Design Rules,Adding design rules Design Rules.,,Design rules concepts,Object set Rule Query,,Setting the rule priority,,How rules are checked(1),Online DRC,,How rules are checked(2),DRC Rules to Check page of the Design Rule Checker dialog, as shown in Figure 8 (select Tools Design Rule Check from the menus). Running a DRC,,Classes and Rooms,Object classes Design Classes. Using classes in design rules,,Rooms,模块化设计 布局方便,,Classes and Rooms,Defining Rooms Design Rooms Moving components into a room Interactive Placement Arrange Within Room Moving rooms,,Component unions Component Placement grid Board Option 快捷键 “o”,Placement（布局）,,Interactive Placement commands,Alignment commands Component Placement commands Tools Component Placement Arrange Within Room Arrange Within Rectangle Arrange Outside Board Reposition Selected Components,,Routing and Polygons,Routing Interactive routing Interactive Routing Differential Pair Routing 必须需要定义差分对,,Interactive Routing,Pressing the TAB key will open the Interactive Routing for Net dialog,,Automatic loop removal Dragging tracks Dragging Arcs 练习布线,,Pin and part Swapping,,Differential Pair Interactive Routing,,Multi trace routing,There is two ways of using the multi trace routing, by dragging multiple track ends, or by placing multiple traces. Place Multiple Traces. Tab键 Press the Shift+F1 keys for a list of interactive shortcuts.,,Interactive Length Tuning,Tools Interactive Length Tuning,,Adding and removing teardrops,泪滴 Tools Teardrops,,18.1.8 Adding and removing teardrops,泪滴 Tools Teardrops,,Automatic routing,Running the Autorouter Auto Route All Auto Route Stop,,BGA Escape routing,BGA逃逸布线 Component Actions Fanout Component Note how the escape route feature presents each connected pad as an accessible route outside the edge of the BGA. Note: The most common reason escape routing fails is because the vias will not fit between the BGA pads. Ensure that there is a suitable Routing Via Style design rule configured to allow suitably small vias to be used for escape routing.,,Polygons and the Polygon Manager,敷铜 Place Polygon Pour 一定是封闭的形状 改变敷铜的属性可以双击 选中后也可改变敷铜的形状 注意用Shift + Space 敷铜的时间很长，完成后有时需要刷新“End”,,Assembly Variants,变量集合 Project Assembly Variants,,Bill of Materials,材料单 Reports Generating a Bill of Materials,,Smart PDF,File Smart PDF,,Viewing a Board in 3D,To view the board in 3D, press the 3 shortcut key. Press the 2 shortcut to change back to the traditional 2D display mode. Note: Viewing the