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樓主 |
發表於 2008-4-9 19:56:37
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只看該作者
原來是floating的問題
8 V1 Z! w' ?1 O0 }; F了解了
1 e1 V# `) O2 [* Z9 o感謝你的解答 - i9 v9 F: |$ _/ X
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6 {" H _; m% l( W$ J5 {' _( I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
6 o( _7 J5 M# |, U' M$ QInformation: Annotated 'cell' delays are assumed to include load delay. (UID-282)4 R: S- N, u$ ^- j, [
Information: Writing timing information to file '/export/home/stevetu/batman/dpwm2/dpwm2.sdf'. (WT-3)
0 I* I/ p7 E4 [- c8 qWarning: Disabling timing arc between pins 'CDN' and 'Q' on cell 'mp_dpwm1/DFF_reg[102]'3 c: W" T( [ t( ~) z
to break a timing loop. (OPT-314)
5 B( h. w6 k9 [! I q/ A( wWarning: Disabling timing arc between pins 'CDN' and 'Q' on cell 'mp_dpwm1/DFF_reg[10]' z' }5 H0 q7 a
to break a timing loop. (OPT-314)0 J' O* @& f0 P& v" ?
; y3 H: w1 p# q要怎麼判斷這些warning是必須要解決的
]5 {$ O& Y8 s W; q因為我還可以把波型合成出來1 U: \" v' B3 d4 O. e1 p. g
可是我怕最後layout部份會有問題/ {* U, ?. T/ i. p" b+ P
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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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