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本帖最后由 John-L 于 2009-8-14 10:10 编辑
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做到下面的要求,ALLEGRO NET-IN就轻松多了:; M1 e3 T7 [/ O
. Q5 b1 m+ R6 uBest practices for Capture-Allegro# A2 x- I! A/ y$ P/ C9 a7 t
Best practices for preparing a library for Capture-Allegro PCB Editor3 F% d0 M( v! H. C3 ?) [1 W
flow
5 o. b+ Q( A/ ]0 I: h( D􀂃 Limit part and pin names to 31 characters: P) C# P% k& H3 o- I/ R
􀂃 Use upper case characters for part/symbol names, part references }+ u- V/ O8 ?% g& V
designators, and pin names( t5 Q9 [) \% G* u8 I/ i% G
􀂃 Do not use special characters to assign part names, references
/ C6 f3 t, x/ ?5 N/ R# E, xdesignators, and pin names
/ @: h6 c0 S: G& A* s1 \9 W$ P􀂃 Do not use duplicate pin names for pins other than power pins
/ u! c8 l+ l: I8 h􀂃 For multiple power pins with the same pin names, do not make some9 [7 n& s9 C- a/ ?' ^2 }& e3 q
pins visible and other invisible6 e' p; `1 H7 {4 r) ~
􀂃 Do not use "0" as a pin number
- y4 Q: u& [# ]; K, i) b9 gBest practices for Capture design for Allegro PCB Editor* U: O3 r7 M3 q3 A' k( e: T( V8 a
􀂃 While defining a net list alias or a net name
( P" z: R* B8 r/ u% A$ V• Keep the maximum length of a net name or alias up to 31
% V/ z- w/ J( z2 z! _- o' |characters1 G+ z7 M4 S G% n
• Do not use lower case or special characters in a net name
# t$ M8 g7 M" P􀂃 Avoid using "Power Pins Visible" property at design level" j# y& L1 r7 N
􀂃 Use net to connect pins1 l" k0 a1 m, k+ f% }$ }+ p
• Leave room for assigning a net name. Pin-to-pin connection' F: g. b# A% I& l9 o: u8 i
changes the net name when a user moves a component: G/ a0 N* ]% N% K9 e
􀂃 Run the Capture DRC command before generating Allegro PCB Editor
! t1 V/ U' ?3 ]3 P N- Qnetlist$ d+ W* R2 }0 }( s, o1 @- s
􀂃 Set path for Allegro PCB Editor footprint before running Netrev/ m' {2 |8 _9 h( G# W8 A9 e: }
Best practices for smooth back annotation/ l" h, U3 B0 s- q1 E, T
􀂃 Do not change design name, hierarchical block names, or reference
; l# p y- y+ M% y% ndesignators in Capture after board files creation
. s$ E5 L ^& f- U1 }( @􀂃 Do not edit a part from schematic in Capture after board file1 c5 a" t% @6 Q! x0 R4 h$ D o
creation
' g% f- i( z4 Y8 t+ R; F2 O+ Z& J􀂃 Do not replace cache as it changes the Source library name and part
+ p# E2 `0 F- E, d8 y0 x2 f3 Pname, in capture0 I" @( v2 c) X% U' A8 ^
􀂃 Do not change the values of component definition properties in: j- o4 d# h; [+ l3 S: O
capture after board files creation# R3 c- @4 o, ]* L
􀂃 Do not change Design file/root schematic/hierarchical block names, K! B: ?" A* @( \) K
in Capture after board file creation
) _' K _# d6 k% \1 x! p􀂃 Do not add or delete components to or from the schematic design
& L& d, M( B7 N: y: O. S# c; ?# Nimmediately after the board file creation. Add or delete components0 @7 U, P% c& R" _ R. Q5 K
after finishing the back annotation process
5 W U8 U2 n: ]7 x8 R, e4 n# L- 2 -
5 o; z! ?+ }& f2 ^" x9 T+ \􀂃 Do not add any additional components in Allegro PCB Editor. Instead,
2 c) p) v0 B: }- Kadd components in Capture and take them to Allegro PCB Editor
7 ?6 e) J/ a( L- u0 u, Q􀂃 Do not add, rename, or delete a net in Allegro PCB Editor) Y7 l6 h! H" ^5 s, z7 d6 J" @* ~
􀂃 Do not change the format for reference designators for parts in
# [, O4 `0 ?# l. f2 _' lAllegro PCB Editor as <Alphabet(s)><Numeric><Alphabet(s)> or! o1 D9 B# A) v, a3 r. @, B: o
><Alphabet(s)>-<Alphabet(s)>* u9 W% `5 ]9 I7 X; r3 \
􀂃 Run Allegro PCB Editor Dbdoctor before running Back annotation by/ ?. c# `& }7 v
selecting the Database Check command from the Tools menu in Allegro
! ^" H9 y5 m8 r/ n* X' PPCB Editor5 F. A+ X& ~- @
􀂃 Make backups of the original design before updating the design with2 G* {2 `/ X6 r% r3 {
the swap information in Capture+ o) y& {. b8 N" e# _
􀂃 Back annotate the design immediately after making the board file." c1 ]6 ?% J8 r3 g$ n7 o
Though it does not a mandatory step, back annotating the design
# R6 n m& t- ^" A$ g2 qbefore placing components helps avoid problems in back-annotation
# B3 I( F* q! j8 u, D, k8 n Xat a later stage.
* H6 @& r' E9 w# x( hIf back annotation at this stage generates an empty swap file, you
5 T3 V* Q8 |8 h, S8 Q8 k$ Zcan proceed with placing and routing the board file. In case any. B# N" r" y6 X/ }1 I' e
problems are detected, you must correct them in the design file and( a+ p3 _: M* X1 G0 b
generate the board file again until an empty swap file is generated. |
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发表于 2009-8-14 10:08
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