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本帖最后由 John-L 于 2009-8-14 10:10 编辑 - [+ n7 A" f7 K: n% j! Z1 A# m( P% \( h
1 c- c. ]& v6 o* q做到下面的要求,ALLEGRO NET-IN就轻松多了:
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& g6 @ s7 e$ O3 o# {( hBest practices for Capture-Allegro
. p9 o5 v& t7 ^) Z3 F; v( _Best practices for preparing a library for Capture-Allegro PCB Editor
; i2 w" X5 u `" `flow3 V. G' u# @0 i1 U
􀂃 Limit part and pin names to 31 characters
$ e# b0 p! D v7 c' j2 m􀂃 Use upper case characters for part/symbol names, part references0 x( p, y, s1 D0 L5 `1 V9 a, E2 O
designators, and pin names
# ]+ D) E' t* C+ R+ V􀂃 Do not use special characters to assign part names, references
, s: m' z& j7 w. bdesignators, and pin names/ X$ k8 W9 l3 C: N7 t! y
􀂃 Do not use duplicate pin names for pins other than power pins- M! F" o/ F& p& q6 O- ~
􀂃 For multiple power pins with the same pin names, do not make some
4 c" L6 w$ a' R( Spins visible and other invisible
: ?4 b- ]' D. j- h2 R% s4 L$ r% }􀂃 Do not use "0" as a pin number1 R0 N" u- Z! I3 n7 g$ m1 H
Best practices for Capture design for Allegro PCB Editor
& m$ ~. [, q4 z9 e p$ z0 A" h􀂃 While defining a net list alias or a net name
, O1 ]( \0 |# T S D- X$ a' V• Keep the maximum length of a net name or alias up to 31' ~) k K6 {) L- L
characters
! u- m/ x6 e9 ~- i2 |• Do not use lower case or special characters in a net name
# S2 q" m: w$ K+ h. g- K5 n( ?6 {􀂃 Avoid using "Power Pins Visible" property at design level% q" I, Z. x3 c
􀂃 Use net to connect pins
1 o2 L# @( ~* k# G• Leave room for assigning a net name. Pin-to-pin connection9 v6 E. Y5 M4 c5 U& R
changes the net name when a user moves a component/ D$ M1 R8 M7 q" s
􀂃 Run the Capture DRC command before generating Allegro PCB Editor
Y' g d: W4 c% snetlist
+ k, N& Y1 Q7 e3 {$ W􀂃 Set path for Allegro PCB Editor footprint before running Netrev) i. Y/ o' x/ A9 U8 r) y, i
Best practices for smooth back annotation
2 I+ v1 E) y5 \/ R, G5 q7 z4 [ u; c􀂃 Do not change design name, hierarchical block names, or reference
6 Q9 Y$ J+ C/ C" X( C6 ~ }! sdesignators in Capture after board files creation
' n7 \9 W. e6 ]2 ^􀂃 Do not edit a part from schematic in Capture after board file# Z+ J' a3 i9 L+ `! z
creation y, \4 J! B+ |3 W c! s* M% d {
􀂃 Do not replace cache as it changes the Source library name and part
+ p' m$ Z8 ]* ^' p; P6 oname, in capture
; E3 z1 L2 E w. H+ H% g􀂃 Do not change the values of component definition properties in! F6 [1 a# i7 k6 u# a) m
capture after board files creation8 M* k0 K' E* K4 Y
􀂃 Do not change Design file/root schematic/hierarchical block names
2 [) a% A# _& v! L6 K: Cin Capture after board file creation
( M. C5 J& [6 {8 L7 V8 {1 P􀂃 Do not add or delete components to or from the schematic design/ `) N; s4 r# i6 `1 |4 }3 c
immediately after the board file creation. Add or delete components, c& q8 _7 v, j" ]
after finishing the back annotation process
0 W3 W% }' x3 ~* x7 E- 2 -. Y; w1 q; ?4 V3 @: s9 w% c
􀂃 Do not add any additional components in Allegro PCB Editor. Instead,0 X/ h1 s' u! p8 y5 G
add components in Capture and take them to Allegro PCB Editor2 \) r: P& W8 L. L
􀂃 Do not add, rename, or delete a net in Allegro PCB Editor
3 V6 Y( C: ^5 q# H( h􀂃 Do not change the format for reference designators for parts in
/ n! P& L: \7 Q% hAllegro PCB Editor as <Alphabet(s)><Numeric><Alphabet(s)> or& ~( \5 o( B) h* _
><Alphabet(s)>-<Alphabet(s)>( T8 F% y' ^% B1 c3 _
􀂃 Run Allegro PCB Editor Dbdoctor before running Back annotation by
/ u' @+ Z7 O3 f9 D* zselecting the Database Check command from the Tools menu in Allegro) R- G% }/ ~; d" ?/ V! S* F
PCB Editor; e; y! P: n) @: n) b/ e
􀂃 Make backups of the original design before updating the design with
& x$ s$ S7 N+ n& j7 D$ Gthe swap information in Capture
! r! p! D% L2 M" h􀂃 Back annotate the design immediately after making the board file.0 I' o% v% X) N% U
Though it does not a mandatory step, back annotating the design
0 a: A0 u! }( f4 ?2 sbefore placing components helps avoid problems in back-annotation
- N4 k- p! i6 K1 _6 A2 f- F! A& |at a later stage.
6 M# z: a/ ~+ E, `2 q) |! GIf back annotation at this stage generates an empty swap file, you: i) I9 L& ]1 B2 s* Z3 A: k. U
can proceed with placing and routing the board file. In case any
+ h7 A. N: ~8 U$ } i; ~problems are detected, you must correct them in the design file and; m7 m% u, Y$ r
generate the board file again until an empty swap file is generated. |
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