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發表於 2008-4-9 19:56:37
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原來是floating的問題
( u8 H- O' |: ^+ f了解了
2 w! k" {) v" X j* t: y# [7 z感謝你的解答 6 }* o M5 g# B9 a) k" y) n; d! F
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( E) b. @3 S- R& k d1 F* _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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: b4 e" Q9 O7 Z( Sdesign_vision-xg-t> write_sdf -version 1.0 dpwm2.sdf. c q0 W$ Z% {5 |" S! E
Information: Annotated 'cell' delays are assumed to include load delay. (UID-282)6 r2 U" a4 j" i. I0 B( F
Information: Writing timing information to file '/export/home/stevetu/batman/dpwm2/dpwm2.sdf'. (WT-3)
/ t, `, `5 r7 sWarning: Disabling timing arc between pins 'CDN' and 'Q' on cell 'mp_dpwm1/DFF_reg[102]'
* P) `5 H/ c6 f! d, [* h to break a timing loop. (OPT-314)
* q8 X; g$ p$ X7 E# u( B6 DWarning: Disabling timing arc between pins 'CDN' and 'Q' on cell 'mp_dpwm1/DFF_reg[10]'* r( g0 e2 x# W+ m1 T; i, B$ v
to break a timing loop. (OPT-314)
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% F0 g4 n( o+ \& y7 m6 G9 A4 J+ g3 a要怎麼判斷這些warning是必須要解決的- w5 g8 Z2 P8 t' A' _
因為我還可以把波型合成出來
1 V9 ~! j" m# G- P2 j可是我怕最後layout部份會有問題* n4 `2 ~( _$ ~3 W
0 o( b' u: Z7 a# |[ 本帖最後由 小人發 於 2008-4-9 08:32 PM 編輯 ] |
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