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回复 gn165625076 的帖子
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Place_Bound_Top; l4 O" c- G) p/ F, g' L8 x+ m
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Used to ensure you don’t place components on top of each without getting a DRC. This boundary4 _5 u- u! f- {
normally defines the component area which may or may not include pins of surface mount devices.
' o2 Y) O. J# I& AThis boundary can also be assigned a component high to be verified at the board level and checked
1 z1 D5 z5 d/ i/ o- I% fto the Package_Keepout_Top boundaries or any other special component clearances. If this boundary% e% N9 b: E/ A5 V+ J @8 S4 X
does not exist than it will be automatically created based on the Assembly_Top outline and the outer d6 p4 R+ N" f$ C
extents of the component pins. This boundary can only be defined at the symbol level (.dra).
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`1 b' r, P) rPlace_Bound_Top用于确保你不会在其他器件的顶部放置器件，否则报DRC。这个功能定义了器件所占区域，包括表贴器件的pins（有些不包括）。这个功能也能用来定义板级检验时的器件高度，和检查Package_Keepout_Top或其他特殊器件间距。如果这个功能不存在，它将依照Assembly_Top的边框和器件pins的向外扩展，自动创建。这个功能只能在symbol级定义（.dra）。
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0 l2 h4 N8 j0 VDfa_Bound_Top
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9 f& R' w# V# K# a& w/ n& OUsed by the Real Time Design for Assembly (DFA) Analysis to check clearances between components
8 l! A, \" Y5 e9 W+ l* ^driven by a Spreadsheet based matrix of components. This boundary normally or can be different then
; m$ ?& D, i1 e" xthe traditional Place_Bound_Top boundary and it may include pins of surface mount devices.
9 ~# K. m6 A8 E9 E& [5 CIf this boundary does not exist than the DFA checks default to using the Place_Bound_Top boundary.
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9 g3 Y: O5 w; u& cThis boundary can only be defined at the symbol level (.dra).6 k2 |: x6 ]1 u
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Dfa_Bound_Top2 g$ i" N* g% v0 E, [9 W
在实时设计中，在器件阵列的数据表驱动下，用它在装配（DFA）分析中检查器件间距。该功能（指定所占区域）可以相同，或不同于传统的Place_Bound_Top功能，即可能包含表贴器件的pins。如果这个功能不存在，则DFA检查就默认的使用Place_Bound_Top功能（来代替）。这个功能只能在symbol级定义（.dra）。% T* D1 ]" t4 Z% I; A* z/ m
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7 O- @' W" l. W1 k. b6 [Package_Keepout_Top! j- a/ I6 s$ i; |
" \& t: h& y, B3 t' ]0 q% H* zUsed to ensure you don’t violate placement keepout areas or high restricted area in a design., @5 G1 C- F7 j2 _
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This boundary can only be defined at the board level (.brd) and cannot be added to the# z ^8 i" E+ d6 m1 j2 w) G& b o
symbol level (.dra) unless it is part of a Mechanical Symbol (.bsm)
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8 b! b! J- P, r, W8 y5 t7 gPackage_Keepout_Top) I3 ]" k9 l5 G T
用于确保在设计中，你不会在keepout区或高度受限区，非法放置器件。这个功能只能在board级（.brd）定义，不能添加到symbol级（.dra），除非他是机械symbol（.bsm）的一部分。% }3 I: ]( Y9 ?% b+ s# u9 Q; y
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发表于 2011-5-25 16:17
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发表于 2011-5-25 21:46
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