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本帖最后由 John-L 于 2009-8-14 10:10 编辑
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3 f* R4 H# F8 X6 D0 O4 M0 v做到下面的要求,allegro NET-IN就轻松多了:' K/ Y4 _! ^/ l3 @, Q
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Best practices for Capture-Allegro
) C; W& o2 S9 M1 P. V9 S5 B' hBest practices for preparing a library for Capture-Allegro PCB Editor7 j1 B! q, N6 L9 F' c4 i8 M
flow
* G2 T f; R( q7 M! `4 \! K􀂃 Limit part and pin names to 31 characters
' M! n# V9 m7 O8 F􀂃 Use upper case characters for part/symbol names, part references
# P: x) d' v9 J8 O6 pdesignators, and pin names. u7 C0 A8 ^$ B6 x& a2 G% K
􀂃 Do not use special characters to assign part names, references, B8 G! S8 J, Q% Q2 |6 X6 e. D# k
designators, and pin names$ n5 ^% k. J* y6 U6 Z9 Q
􀂃 Do not use duplicate pin names for pins other than power pins
4 s" y$ a! o6 w' j+ {􀂃 For multiple power pins with the same pin names, do not make some
* k' w; b5 O3 N) ~8 L0 v, Kpins visible and other invisible# U0 ~( ^ d1 x7 x4 B J
􀂃 Do not use "0" as a pin number, X; N. Z. J% L/ _5 E8 R! Z
Best practices for Capture design for Allegro PCB Editor" U* g7 c, V& w3 b7 @9 c
􀂃 While defining a net list alias or a net name6 J8 A5 `0 j @3 P" b
• Keep the maximum length of a net name or alias up to 31
: A y5 C$ L% \characters
) W, C+ c9 y" q" F+ c$ H• Do not use lower case or special characters in a net name9 G& ?" `5 O+ D7 o: h: Q! a
􀂃 Avoid using "Power Pins Visible" property at design level2 u. X( a/ _# l
􀂃 Use net to connect pins# L9 E8 |) n- s0 A+ ~4 _- I# O
• Leave room for assigning a net name. Pin-to-pin connection4 `( F/ P0 a! R0 s1 m* T
changes the net name when a user moves a component
" A2 |+ k& w8 _ t! u/ P􀂃 Run the Capture DRC command before generating Allegro PCB Editor: u" a/ w1 g' Z' m- s$ F
netlist
1 w- T0 O/ c+ i7 e" W$ d+ b( [􀂃 Set path for Allegro PCB Editor footprint before running Netrev
- v0 b* \+ t& ^Best practices for smooth back annotation
/ k3 X( \2 A' @􀂃 Do not change design name, hierarchical block names, or reference
3 J) P" ?* C1 ]: J6 Zdesignators in Capture after board files creation
" l: L- w2 x1 x+ M" a5 e, {􀂃 Do not edit a part from schematic in Capture after board file
' W( S$ Z$ F4 @0 c* e9 `# K$ l/ ocreation
9 t' o+ y: D. z9 g+ s# V􀂃 Do not replace cache as it changes the Source library name and part/ H- e7 W% W6 p C0 ]4 l; `$ ~4 I, B
name, in capture
- h; b* t5 l J0 a8 ~& Z4 j􀂃 Do not change the values of component definition properties in; O" u# T2 i% a1 a3 P2 x
capture after board files creation) K7 i. ~2 B6 U, i
􀂃 Do not change Design file/root schematic/hierarchical block names* z f- z. v1 O+ R
in Capture after board file creation
9 h+ P# G( S' _􀂃 Do not add or delete components to or from the schematic design
& Z$ S6 C' X. M6 O! r5 M e4 limmediately after the board file creation. Add or delete components
+ j5 V# w1 E; Pafter finishing the back annotation process
4 H( W" ^" g5 d* l. E; [6 z- 2 -
7 ?8 w) w1 ]' D: j# Y% N8 e" O& V􀂃 Do not add any additional components in Allegro PCB Editor. Instead,/ X+ m1 Y/ k' G0 T3 G: M
add components in Capture and take them to Allegro PCB Editor
% b f q' [6 q􀂃 Do not add, rename, or delete a net in Allegro PCB Editor) I, c3 c9 r! T& I
􀂃 Do not change the format for reference designators for parts in
* t1 I& {2 c: E: TAllegro PCB Editor as <Alphabet(s)><Numeric><Alphabet(s)> or
: m( } m# f T* u% N><Alphabet(s)>-<Alphabet(s)>
* p( u3 B1 w' T+ P1 E. _. o􀂃 Run Allegro PCB Editor Dbdoctor before running Back annotation by" p1 \9 q2 a' _% J) S# y6 q
selecting the Database Check command from the Tools menu in Allegro
! c, z7 E ]/ ]+ i2 [# _PCB Editor
& ~+ k/ P' f# q( S9 S @􀂃 Make backups of the original design before updating the design with
5 t6 F/ O& u8 v* I3 H! j. Nthe swap information in Capture
8 l! ~: C# G2 ~' l, v% j+ R$ ]􀂃 Back annotate the design immediately after making the board file.8 z. @1 U+ A1 g
Though it does not a mandatory step, back annotating the design
. s8 h' S. w/ o" cbefore placing components helps avoid problems in back-annotation- I9 S" F5 J7 L9 q1 x
at a later stage.
! c* u8 x0 {, v) ]1 f+ L# zIf back annotation at this stage generates an empty swap file, you1 M9 T' O8 ?! P+ E" m0 j& l
can proceed with placing and routing the board file. In case any9 o5 |5 o p3 C1 x F
problems are detected, you must correct them in the design file and' z: ?1 ?" ?" ~6 Z
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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