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本帖最后由 John-L 于 2009-8-14 10:10 编辑
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5 T) ~6 J8 ?2 v做到下面的要求,allegro NET-IN就轻松多了:2 G: j) R7 z& R8 [, k$ V
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Best practices for Capture-Allegro
( d! v' ~/ i$ CBest practices for preparing a library for Capture-Allegro PCB Editor# ]6 j, v4 L3 Q/ H- \3 u! i2 N
flow; S( i# F' z1 q* u! s
􀂃 Limit part and pin names to 31 characters" F# k5 F) l$ {- ^# v* u; {" U
􀂃 Use upper case characters for part/symbol names, part references& p4 S- ~, Z. b: P4 @+ a5 k
designators, and pin names7 w% h) w% w9 T" t: p6 e
􀂃 Do not use special characters to assign part names, references. @' o' h0 H5 z1 C/ U
designators, and pin names
! o4 H+ E# ]/ u% ~, M􀂃 Do not use duplicate pin names for pins other than power pins
" @1 U! t6 J8 z7 p& G& X j- J4 @􀂃 For multiple power pins with the same pin names, do not make some* w1 ~- U- b: w) k ^
pins visible and other invisible
: W: X1 w$ |0 x" V􀂃 Do not use "0" as a pin number
/ q$ o; R7 j( `1 a2 {* R& [8 \, eBest practices for Capture design for Allegro PCB Editor
- m/ K/ |$ d9 m4 v􀂃 While defining a net list alias or a net name% h, O/ `/ `8 l. Y3 z4 z2 a. d
• Keep the maximum length of a net name or alias up to 31
9 G7 k# Q- o5 Jcharacters
2 i$ q+ S+ ]1 }& j7 W" S• Do not use lower case or special characters in a net name& e/ H0 {+ \ o; k$ y! X! y
􀂃 Avoid using "Power Pins Visible" property at design level* R- W6 Q, i( |
􀂃 Use net to connect pins) ]' p* A1 G1 P, n8 Q3 H
• Leave room for assigning a net name. Pin-to-pin connection
# I& J! q' y8 r: v' \. O/ ]: f4 xchanges the net name when a user moves a component
* x& Z- a- v& F9 h􀂃 Run the Capture DRC command before generating Allegro PCB Editor8 n6 F0 q5 V4 E: ^$ c( m
netlist
, S; l4 L7 }8 o4 |9 X4 J􀂃 Set path for Allegro PCB Editor footprint before running Netrev) H7 m6 s+ R% E" |6 y
Best practices for smooth back annotation
1 B" {) a# N- f5 p$ [$ r8 w- k􀂃 Do not change design name, hierarchical block names, or reference
5 y# l+ H3 z+ d# V/ }designators in Capture after board files creation
) n1 L( B* a- ?$ b, H􀂃 Do not edit a part from schematic in Capture after board file
2 h! F, _& c# W1 p% A/ B5 ycreation. r8 h( V; s4 H. w; o
􀂃 Do not replace cache as it changes the Source library name and part) X$ C9 d0 p7 {4 ~
name, in capture
" B# v7 v/ U, p( G3 U" d& }6 q􀂃 Do not change the values of component definition properties in: |9 R$ M, d3 I- Y) D3 J
capture after board files creation. S( w! e7 G$ K
􀂃 Do not change Design file/root schematic/hierarchical block names2 Z9 Y( M5 Y5 E1 J% {- I
in Capture after board file creation" C; ?# ?$ k$ }. R2 |3 V/ N. Z
􀂃 Do not add or delete components to or from the schematic design
( k+ t+ W" `9 i9 A/ qimmediately after the board file creation. Add or delete components: ^# y: p+ U& r
after finishing the back annotation process
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􀂃 Do not add any additional components in Allegro PCB Editor. Instead,
3 J% \8 a6 i/ n! V2 H! Y% nadd components in Capture and take them to Allegro PCB Editor+ g \8 Q" t, I& }- w$ T# R
􀂃 Do not add, rename, or delete a net in Allegro PCB Editor
# m2 \/ ^3 L [/ ~$ ~: Q; U􀂃 Do not change the format for reference designators for parts in1 g1 i, r( K% E- |6 l4 _, l |: s
Allegro PCB Editor as <Alphabet(s)><Numeric><Alphabet(s)> or
. \, K* V+ Y2 _><Alphabet(s)>-<Alphabet(s)>* e5 ~3 v% x5 S( c! L1 [9 Z" T
􀂃 Run Allegro PCB Editor Dbdoctor before running Back annotation by
, b: F& C5 P. E4 Tselecting the Database Check command from the Tools menu in Allegro
V/ g6 b' \: @2 e! wPCB Editor
. l: h+ t n; |* Q5 @􀂃 Make backups of the original design before updating the design with
+ m( D- L# \* k. P0 w, k& |+ g- tthe swap information in Capture, k0 s# f. A2 l7 M. A9 H
􀂃 Back annotate the design immediately after making the board file.
3 P" e( D i- z! | s9 tThough it does not a mandatory step, back annotating the design2 s. c8 N/ e0 D0 k3 D: P. ~9 j
before placing components helps avoid problems in back-annotation
& q, V9 H' s0 ]- |at a later stage.
2 t1 y, S4 U& U' l6 d. y; }0 oIf back annotation at this stage generates an empty swap file, you
% q3 Z( D; w" k) B1 u" W2 lcan proceed with placing and routing the board file. In case any
. L8 h) ]+ {8 [problems are detected, you must correct them in the design file and
. u4 n. O, P2 e& M, agenerate the board file again until an empty swap file is generated. |
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