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回复 honejing 的帖子
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谢谢honejing。不过那个warning使得仿真出不来啊。。。而且model也是我在官网上下的。出错的可能性比较小。。。3 j; k Y4 w0 r" J/ c
这条网络就可以出来。
7 z, l- f' q# ]- h. B m! ]% f**********************************************************************
" `" K# }* C, _/ ` NET = clk, n000763 u/ g# l6 h, N" g$ [) ?8 k
Nets coupled during high-accuracy simulation
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SIGNAL-INTEGRITY SIMULATION RESULTS -------------------------------9 J5 K: {7 d3 ~1 J# U; j' H
Driver Receiver Rnd Rise Delay(ns) Fall Delay(ns) Overshoot(V) Crosstalk(V) ERROR FLAGS
' F% {( _' H5 S Device.Pin Device.Pin Rbn Min Max Min Max rise fall rise fall rise fall6 s# J2 Y* K) L( W: L8 S
U1.13 U7.18 1 -0.091 1.179 0.493 2.342 0.153 0.153 NA NA ------- -------
' ~2 Q) ?- I+ V U1.13 U9.9 1 0.467 1.518 0.843 2.003 0.328 0.328 NA NA RO----- RO-----
4 K2 _* }9 L" j/ J max. rising overshoot allowed = 300 mV
9 m a* @0 I9 X max. falling overshoot allowed = 300 mV
! `1 }4 o, I2 U' Y% [" U min. delay allowed = -5.000 ns
# n2 u' M( ?! {' R/ m( J max. delay allowed = 1000.000 ns) w4 w$ V: _ `4 C# ?( f' I- p
SI high-accuracy threshold(+-) = 150 mV
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下面这个,就只有这么一句话。。。
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********************************************************************** n u; _' C3 i. y1 D
NET = DA10# b1 y$ ~" M, {0 c4 P
Nets coupled during crosstalk simulation
3 i8 X7 c. L- P: D1 v =AD5, DA9, DA13
: b5 ?3 t8 L# t+ u Nets coupled during high-accuracy simulation- o' ~/ z: _9 R8 Z
=none& w2 t# M. z( j3 ~0 U+ g
** Warning(Severe) ** Could not analyze SI; DC operating points not valid; check model thresholds
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\8 ?' U/ K. f$ d, G% P6 _9 k不知道怎么回事。。。
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