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1.布局时飞线(鼠线,connection)的处理。 Layout的缺省设置并不是让飞线最短化。一开始布元件时,飞线实在是密如蛛网,晕头转向。Tools\length minimization (CRTL+M) 也没有用,硬着头皮在缺省设置下完成了元件布局。几欲faint。后来才发现其实没有设置好。正确或者说方便的设置应该是让飞线最短并且在移动中始终最短。: v- k1 _, R, F; |* p
" s# S; D$ \' VSetup\design rules\default rules\routing\ topology type\minimize
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* f% t+ T0 [ W V' K% f, u7 D* q这样在按CTRL+M,很多飞线就消失了,也就最短了- V* Q+ N* Z {2 g7 e" r
1 J' ^+ A) @, H, VSetup\preference\length minimize\during moving
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这样移动元件是飞线始终最短。1 i7 U1 S+ I0 V2 k8 u$ q
8 x7 j7 j# m9 l- f: T另外,很多飞线其实是地线。可以把地线的飞线先hide起来。并把地线的net设置成比较特殊的颜色。这样就布局就方便多了。
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View\nets\ 选在左边net list 选GND net,加到右边view list。在右边选GND,下面view unroute details 选none, 在左边颜色中选一个颜色。$ O8 p4 y: V& z. n5 F& A& @
8 q' J0 V% ?. w. |0 c0 e! ]& N% O, _这样地线的飞线就hide起来了,并且是同一种颜色。当然这里要小心信号地和power地要分开先。: E/ V$ d9 M' Z ?4 m
1 O" H7 C8 l9 S i这样的设置布局起来就方便多了。早知道就好,ft。
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+ i. |: o7 b7 j: F2.改全部元件的字体属性。和protel一样,这个是可以一次全部改成相同的属性的。
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1 w) \4 z% X E& a& ] ?单击鼠标右键,选select components, 再单击右键,选 select all (CTRL+A)。再单击右键,选query/modify (CTRL+Q), part outline width 输入想要的宽度,下面选label, 选Ref. Des. Press the big button under it. 弹出新窗口, input the value you want at size and width. Press OK. Then the size, width , even the part outline width are same. 有点麻烦。呵呵。
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; H9 C1 O, ?% x) ?& g0 |3.加过孔。开始我也以为PADS不能随便加via,必须要画trace,然后加了还一段在top另一段在bottom,很让人ft,因为这via实在是太常用了。对GND的via要能经常的加随意的加才好。其实这也可以。- T1 U% h& J" p
4 v! U: D8 }0 D+ }+ z单击老鼠右键,check “select net”, select the net you want to add via, usually, GND net, the GND is high light. Then right click mouse again, select “ add via”, then you can add vias which are connected to GND net. Freely and put them wherever you want. Remember, if the GND net is hide and set to a special color, no connection for these vias, but they are same color as other pads and trace in GND net. 8 J0 h% q9 o r) I# B' |
: C2 s. S" W% ?( `2 W* G/ E! Q4. 覆铜。覆铜应该是PADS的一大优点。快了很多。对于焊盘可以选择铜是盖过去(flood over)还是用对角(orthogonal, diagonal)连. s8 C0 v8 r- ?3 v/ a
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接。对某一个形状的焊盘只能一种设置。如果有几个圆形焊盘希望铜铺过去,而几个相同的圆形焊盘想用梅花连接。那可以这4 O/ y$ Y, o% q! a( N
7 C2 D" d) e- g8 @2 C2 u/ d& @ 样。覆铜时preference\thermals\, select the pad and shape, check “ orthogonal” or “diagonal”, then all these shape pads are orthogonal or
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5 a) ~: u+ t4 q& F8 C diagonal connection to the copper. And then, put a copper (铜皮)to the pads you want the copper flood over,and assign the same net to the
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' ~. ?* B+ r- ^( A1 c copper. Then these pads are flooded over by the copper.
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