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always @(posedge CLK_50M or negedge PORB); D7 l: h4 D! N4 T
begin5 [& ^: t# M' g V
if(!PORB)
% v/ R/ U6 |8 @% b* K sys_signal_d1 <= #1 1b'0;; ^% g; ?" K9 v/ ^7 x) \
else9 |' ]/ F# J( a* k% s
sys_signal_d1 <= #1 sys_signal;
' q ]. m' a W& a* X2 lend
( ~( |' K' R; F$ J! z9 K4 N( N, N, P! t1 R1 H0 N
assign sys_signal_pul = sys_signal & ! sys_signal_d1;
% `. I( U; a+ Z, E! K$ [/ ~
* A! j- D# ^2 h7 k. \: a; |always @(posedge sys_signal or negedge sys_signal_pul)1 m6 ^# E- s2 \3 ~
begin& Z5 n3 k6 c. n! M4 V
if(!sys_signal_pul). \; o) K( b' m. e1 Z9 W) R
rst_B1 <= #1 1'b0;
' c; {1 E0 C8 {: w' m7 l5 x6 C else' z5 g( o% t. z V' x0 P% {
rst_B1 <= #1 1'b1;
1 \+ }$ n; a' S5 cend |
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發表於 2009-1-9 11:20:02
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