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本帖最后由 John-L 于 2009-8-14 10:10 编辑
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( Q3 V' k ~: I0 s: Y5 A* s, }做到下面的要求,ALLEGRO NET-IN就轻松多了:' f6 n, X# `! l. u C" y
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Best practices for Capture-Allegro& T9 X. [4 B; @) }" i( z
Best practices for preparing a library for Capture-Allegro PCB Editor' G% M) U6 N5 W; T% L+ Q2 ~0 E! f
flow
, v5 k0 u1 q# ^. Y: v3 q% Y1 S􀂃 Limit part and pin names to 31 characters; C) t' t+ ~2 a; Z* _3 g/ h( R
􀂃 Use upper case characters for part/symbol names, part references
8 t( u+ Y- z/ M5 U& w6 V# W9 I P- Tdesignators, and pin names
( @) f! Y, h! ?# |􀂃 Do not use special characters to assign part names, references! Z4 {0 v/ k8 J; ]/ k
designators, and pin names
`. d7 y3 Z6 V􀂃 Do not use duplicate pin names for pins other than power pins
! c3 O) o1 x' D2 `9 ?" L􀂃 For multiple power pins with the same pin names, do not make some: L8 @; M* k$ `1 z7 u
pins visible and other invisible1 V* O2 H2 j) T- R# d. t7 Q9 }4 ^" _
􀂃 Do not use "0" as a pin number
7 V, C* K) M" Z6 e2 L! R1 |Best practices for Capture design for Allegro PCB Editor2 i, I, y) r" H! v) X6 }. ^
􀂃 While defining a net list alias or a net name3 K7 U8 _. e% ^ j) g
• Keep the maximum length of a net name or alias up to 31
, q" x% [" @0 x1 ocharacters
: Z# w' J5 t% v; J. R• Do not use lower case or special characters in a net name
! {* ~; W j# ]0 F􀂃 Avoid using "Power Pins Visible" property at design level- ]! ^ }4 A. A$ ~. q8 N7 B0 [ }! b
􀂃 Use net to connect pins
8 Z+ H) G& f; C1 }3 E: L# @- @• Leave room for assigning a net name. Pin-to-pin connection
3 E8 s5 u9 Q$ S& v0 P" ], nchanges the net name when a user moves a component
9 Z4 A, {$ l4 D3 ^/ f􀂃 Run the Capture DRC command before generating Allegro PCB Editor: R E. D+ t3 y/ M6 x% z) l8 q: t
netlist: F# L4 Q8 w4 N2 r
􀂃 Set path for Allegro PCB Editor footprint before running Netrev- e$ g \: J" q7 [
Best practices for smooth back annotation
9 } Z4 D- I+ C# V, F: S% e9 Y􀂃 Do not change design name, hierarchical block names, or reference
( b$ e6 X }; N/ E3 g, Ddesignators in Capture after board files creation
5 d! G% X5 z- u7 l􀂃 Do not edit a part from schematic in Capture after board file
, w/ N, U: t/ t* \! fcreation
& A. v6 x, U, v, F3 f# k% u' }' D􀂃 Do not replace cache as it changes the Source library name and part
( Z; ?, X1 Z! }& O# _name, in capture
" @6 Z! _9 f. j$ [- c2 G2 f􀂃 Do not change the values of component definition properties in5 r- q' c! T& O# p! ^. q% R
capture after board files creation
% a& ^, {0 K2 Z3 I5 B􀂃 Do not change Design file/root schematic/hierarchical block names- w1 h7 R0 V4 ~; a: U9 b
in Capture after board file creation
& J1 w5 G; d b, l* `3 a) O4 ]􀂃 Do not add or delete components to or from the schematic design" H7 @, o5 l( Z- I& M/ h! \
immediately after the board file creation. Add or delete components* p% g# J( [' ^8 |/ P
after finishing the back annotation process
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􀂃 Do not add any additional components in Allegro PCB Editor. Instead,
( O6 t% R# ^) v$ [3 Zadd components in Capture and take them to Allegro PCB Editor
6 E& ], ?6 z/ m+ C; S- y􀂃 Do not add, rename, or delete a net in Allegro PCB Editor8 Q/ T Y8 d6 y) d: {
􀂃 Do not change the format for reference designators for parts in$ I x9 E1 R( J7 d" s0 W
Allegro PCB Editor as <Alphabet(s)><Numeric><Alphabet(s)> or; p$ d7 b0 Y% w) f' ] ]
><Alphabet(s)>-<Alphabet(s)>
" U1 \1 l. h+ s􀂃 Run Allegro PCB Editor Dbdoctor before running Back annotation by
9 w" t) m# }% H: ^8 g' Nselecting the Database Check command from the Tools menu in Allegro0 N) {3 y1 k! n4 T+ |& O
PCB Editor
4 \, R/ [0 K- D. `: D5 D% F􀂃 Make backups of the original design before updating the design with. k7 s: M' w0 M: n+ r
the swap information in Capture" H$ \6 Y N) x* H P) \# m0 Y9 n
􀂃 Back annotate the design immediately after making the board file.
1 i q1 G- Y( O2 _9 C4 g; MThough it does not a mandatory step, back annotating the design/ H. G Z& U" e7 z
before placing components helps avoid problems in back-annotation
1 Q; o/ g4 B# ^. kat a later stage.
0 n- A& @/ }1 O( j& C3 {9 vIf back annotation at this stage generates an empty swap file, you$ B0 X0 z) J: ~
can proceed with placing and routing the board file. In case any0 @- D8 ]2 x9 ]) K, w ~* G+ B
problems are detected, you must correct them in the design file and
v2 P( b$ d Ngenerate 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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