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發表於 2008-4-9 19:56:37
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原來是floating的問題
4 p( t/ P2 s0 r* [了解了& x+ V4 o0 x9 k. s0 v. i; |7 q
感謝你的解答 1 p4 A7 j; o3 Z( t$ _& u) Q
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另外還有一個問題 也是在DV階段跑出來的warning 如下:
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design_vision-xg-t> write_sdf -version 1.0 dpwm2.sdf
: V) a# V) V" { P; G# CInformation: Annotated 'cell' delays are assumed to include load delay. (UID-282)1 d( J3 W- I* I- g i
Information: Writing timing information to file '/export/home/stevetu/batman/dpwm2/dpwm2.sdf'. (WT-3)
$ z# _9 O( W2 `7 { xWarning: Disabling timing arc between pins 'CDN' and 'Q' on cell 'mp_dpwm1/DFF_reg[102]'+ x8 R8 n, F* W& U
to break a timing loop. (OPT-314)
3 E9 y3 m6 r; S9 L5 }Warning: Disabling timing arc between pins 'CDN' and 'Q' on cell 'mp_dpwm1/DFF_reg[10]'' T0 @( q$ T4 b; R4 M
to break a timing loop. (OPT-314)0 e' f: C! b; {8 X9 L6 n7 C
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要怎麼判斷這些warning是必須要解決的9 k$ _+ K q9 N
因為我還可以把波型合成出來( n* [8 z! _6 A; F, r; ]
可是我怕最後layout部份會有問題8 W3 h0 d1 o. T
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[ 本帖最後由 小人發 於 2008-4-9 08:32 PM 編輯 ] |
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