|
|
回复 gn165625076 的帖子% e/ D" K0 I3 q4 r/ e: G i
2 \0 s' K$ q; J c1 CPlace_Bound_Top( V) G6 r5 B& }/ K
/ a3 p5 t2 [6 ~: R$ z- yUsed to ensure you don’t place components on top of each without getting a DRC. This boundary
& _/ C/ U; `, n/ Snormally defines the component area which may or may not include pins of surface mount devices. ( G. ~# a) M0 K1 }% G8 W
This boundary can also be assigned a component high to be verified at the board level and checked
% X, t& m9 P' ? t# ]' b8 w8 bto the Package_Keepout_Top boundaries or any other special component clearances. If this boundary6 @+ _) z' K- O, _: \- ]9 b
does not exist than it will be automatically created based on the Assembly_Top outline and the outer4 u% z7 j) U4 Z% R4 E% a5 V
extents of the component pins. This boundary can only be defined at the symbol level (.dra).
$ \: V0 X. P- `/ c: D: J! V* X( L8 z7 {* Z N
5 A' u( f, f) i
" @* J; R* s6 U" q& S8 @ F! f& IPlace_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）。4 f; K. p/ d/ B( x' [( n
' m3 v$ y- y; ?
. q, {- r* J5 V. W; Z2 eDfa_Bound_Top
& }1 n% X _, z$ U F# R: s- q9 H/ F8 H0 Z& `" p
Used by the Real Time Design for Assembly (DFA) Analysis to check clearances between components+ B W) M, o0 K$ F2 D2 A, Y9 G
driven by a Spreadsheet based matrix of components. This boundary normally or can be different then; C* U# a4 @( X0 d* ~3 g- a
the traditional Place_Bound_Top boundary and it may include pins of surface mount devices.
$ C* S; s0 J! t$ mIf this boundary does not exist than the DFA checks default to using the Place_Bound_Top boundary. 3 H4 \$ S6 L% }' g$ i9 p" Y9 b: I8 ?
, L6 b4 q3 R# }' l+ J7 A/ PThis boundary can only be defined at the symbol level (.dra).
9 G6 P8 l) R, i5 ~6 I; g" d, w9 \8 s7 z" ?5 I, G4 H- x2 s/ [
& b6 D, b* j" W3 y4 o' u6 N
2 j( z% Z0 s/ q1 Q& l* ~Dfa_Bound_Top8 l9 H3 u% u, F. k& L3 U
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）。
$ d$ @/ |: p1 d0 f H3 p
1 s9 I' G4 f9 Y2 e2 O# I( @& ?# d6 H0 c
: H! c z/ K" a7 h9 }
# |: y4 R* M2 `, |Package_Keepout_Top7 a; ?- I' ^3 H, Y/ z, _
0 S4 }( P: _9 `7 v- Q) k7 L% j9 gUsed to ensure you don’t violate placement keepout areas or high restricted area in a design.0 c" M- T0 S' _; ~9 O! [
' E5 M1 d* d/ V2 v2 r G7 k
This boundary can only be defined at the board level (.brd) and cannot be added to the
( C, Z( f) B* tsymbol level (.dra) unless it is part of a Mechanical Symbol (.bsm)
2 @9 w; V# S8 F( d( K9 o7 r4 [
$ A7 J. t1 D* |3 b! i
% l* Z2 y8 C2 C: T0 g% x8 mPackage_Keepout_Top
& V4 K; F2 A8 z2 Z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 d2 @4 n4 E: R
|
|
/1 
发表于 2011-5-25 16:17
QQ好友和群
QQ空间
腾讯微博
腾讯朋友
微信
收藏
支持！
反对！
楼主
发表于 2011-5-25 21:46
dsf 
