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这是我设置XNET等长后,布线完成对线进行show element 弹出的信息:$ O$ p$ m% m0 }, F0 X
我明明设置的XNET是 是 Total Ecth Length :min = 2000 MIL , max = 2100 MIL7 A7 t. w+ S4 w6 R) z6 a
在Reletive propagation delays 中设置的公差是 0:100 (mil)
" H7 G# s# Z+ s; q- G) T+ c! v为什么会出现“ (RDly) (Xnet=IDE_D9) U3.D17 to IDE1.6 min= 2191 MIL max= 2391 MIL actual= 2362 MIL; \& v7 g- L& W) B
target= (IDE_D9) U3.D17 to IDE1.6”' p3 m% n- k2 s: a
这个结果?, \0 O% X' u# K
4 J; h& s. m5 _附:该线的网络具体情况是从 U3 .D1------ RN(排阻) --------0(过孔)-------------- IDE1.6
& ~( s' E# [ O5 ~7 Q |4 }5 s0 G* \0 H9 O
-----------------------------------CF1.48
+ M6 f6 C* W0 H: m, ~/ @
1 q3 M% Y9 l( g. |我的意图是设置 U3.D17 到 IDE1.6 线长为2000 ~ 2100 (MIL)而不计 过孔到CF1.48 线长。
4 b# h9 O+ {0 n3 }我这样设置对不对啊?应该怎么做呢?* t7 p; p9 v; k% v3 {, [ X+ F( F/ }/ V
0 {3 Y+ q) H1 s: k第二个问题:RDly 与 totE 分别表示什么?
) d+ k- x* r; o* b' o% l" H3 ?* U5 X. G
5 z0 {8 Z( r2 l: k' \
LISTING: 1 element(s)
6 o* I* \2 n8 I# Y) i < NET > ( y; F' ]6 D, C
Net Name: IDE_D9- n# t+ w% s: v q T9 N
Member of XNet: IDE_D9
6 L* m) Z; P4 M. G Member of Bus: IDE_DATA_BUS& p& M/ ?4 i. C2 C( E
Pin count: 35 E7 o/ G+ n' S, Q {
Via count: 2
) j: I6 W& m. C+ M5 g Total etch length: 2662 MIL: m! X ]0 q& S0 G% u z; P
Total manhattan length: 2064 MIL( k- k& Q- u, b/ {/ K! y
Percent manhattan: 128.97%7 h! q& H, o4 w. h; o
Pin Type SigNoise Model Location
u6 V/ _" u3 @8 T --- ---- -------------- --------" I8 d9 p+ ]2 O; r5 A4 L
IDE1.6 BI CDSDefaultIO (5901 376)5 _% y' |4 |( Z* \/ U2 Q0 X
CF1.48 UNSPEC (6137 1525)8 d9 O$ c. K# U+ c6 l2 t, {
RN6.1 UNSPEC RN6_22 (6623 1718)
* h- u4 q. l2 V% R0 W' N" I' E No connections remaining$ f% L9 U* d: ?3 [ ]
Properties attached to net+ R s' ^8 C0 _
BUS_NAME = IDE_DATA_BUS
3 t( [# L) E4 W! o6 h# i$ V$ h LOGICAL_PATH = @ls2f_motherboard.schematic1(sch_1):ide_d9: X5 t; g" d n
NET_SPACING_TYPE = IDE
7 R7 ?; _# Q% Q1 D% K TOTAL_ETCH_LENGTH = 2000 MIL:
9 Z5 f) P& E9 X3 _ Electrical Constraints assigned to net
& R$ y2 ^* q! b7 B2 Z total etch length: min=2000 MIL max=none& e( l8 X( z1 E1 b" F: I
Constraint information:
7 m" o6 Y; N1 |( h7 } w (RDly) (Xnet=IDE_D9) U3.D17 to IDE1.6 min= 2191 MIL max= 2391 MIL actual= 2362 MIL' ]5 n, @/ k* L$ a8 @ ~# J+ W% v* _
target= (IDE_D9) U3.D17 to IDE1.6( f4 g4 H" D# l' c! k( g% ~
(6802,2198) pin U3.D17,BI,TOP/TOP7 u- m- [. X1 z0 s+ Z
506 MIL cline TOP1 k# h3 N1 Z3 P6 m' {
(6623,1782) pin RN6.2,UNSPEC,TOP/TOP
* P* ]2 Z$ B; Q$ B2 p (6623,1718) pin RN6.1,UNSPEC,TOP/TOP
! |# U% Y# ?5 H# w 41 MIL cline TOP
, `7 D6 @) n/ N( ]9 \ (6623,1677) via TOP/BOTTOM
# ` {: _% T; @/ A1 G0 Q4 w* x 746 MIL cline TOP& @% `, h1 D" e# e0 _1 H
(6597,942) via TOP/BOTTOM# B0 e1 u' G$ P+ |* `; B
1070 MIL cline TOP2 n8 T& u3 {2 ?
(5901,376) pin IDE1.6,BI,TOP/TOP1 o) j1 M1 x: P) I# P
(totE) (Xnet=IDE_D9) min= 2000 MIL actual= 3168 MIL
4 f# |3 B: C+ c 805 MIL cline BOTTOM
. [: g; k1 x9 u3 X/ W) @* i 41 MIL cline TOP9 Y! Z( X4 D5 H1 D6 x5 N9 @9 Y
746 MIL cline TOP7 e$ C" E. S o$ U# j# e& `' Q0 c
1070 MIL cline TOP
1 W, @! m% e6 ?+ k2 Q1 O6 a# ` 506 MIL cline TOP
; w% E4 Z, K* M2 t) W2 @+ @ Member of Groups:
& @6 z: m) r# _) u& b XNET : IDE_D9" z7 K0 z7 N2 g" G3 M
+ I q9 Y1 x R3 r! J
先谢谢了。。 |
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