鏁扮數瀹為獙
2
瀹為獙鎶ュ憡
1
銆?/p>
璁捐淇敼鏂规
锛?/p>
1
锛夊姞鍏ョ紪鐮佸櫒杩炴帴
4
閫変竴鏁版嵁閫夋嫨鍣紝鎺у埗杩涜杩愮畻鐨勭绫?/p>
锛?/p>
2
锛変慨鏀逛簡杈撳嚭绔暟鎹�夋嫨鍣ㄧ殑绋嬪簭锛屼娇寰楀綋璁＄畻鍣ㄦ病鏈変换浣曡緭鍏ユ椂锛岀粨鏋滄樉
绀轰繚鎸佷负
0
锛屽苟涓斿埄鐢ㄨ姱鐗囪嚜韬殑鐏浂绠¤剼锛岃鏄剧ず缁撴灉涓紝褰撳崄浣嶄负闆舵椂锛屽崄
浣嶇殑闆朵笉鏄剧ず銆?/p>
VCC
x1[0..3]
INPUT
VCC
y
2[0..3]
INPUT
VCC
sw3[3..0]
INPUT
x[3..0]
y
[3..0]
s0
s1
sub1[3..0]
sub2[3..0]
add1[3..0]
add2[3..0]
mul1[3..0]
mul2[3..0]
div
1[3..0]
div
2[3..0]
mux_4
inst13
a[3..0]
b[1..0]
encode
inst14
b[1..0]
b[1]
b[0]
缂栫爜鍣ㄦā鍧楃▼搴?/p>
module encode (a,b);
input[3:0] a;
wire[3:0] a;
output[1:0] b;
reg[1:0] b;
always@(a)
begin
case(a)
4'b0111:b<=2'b00;
4'b1011:b<=2'b01;
4'b1101:b<=2'b10;
4'b1110:b<=2'b11;
default:b<=2'b00;
endcase
end
endmodule
缂栫爜鍣ㄦā鍧楀姛鑳斤細
鐢?/p>
4
涓崟鐙殑鍗曚綅璐熻剦鍐?/p>
鎸夐敭瀵硅绠楄繘琛屾帶鍒讹紝
4
涓寜
閿笉鎸夋椂鍏ㄩ儴涓?/p>
1111
锛屽綋绗?/p>
涓�涓寜閿寜涓嬪悗锛岃緭鍏ュ彉涓?/p>
0111
锛屽垯缂栫爜鍣ㄨ緭鍑?/p>
00
锛堟墽
琛岄櫎娉曪級
锛屽綋绗簩涓寜閿寜涓?/p>
鍚庯紝杈撳叆鍙樹负
1001
锛屽垯缂栫爜
鍣ㄨ緭鍑?/p>
01
锛堟墽琛屼箻娉曪級
锛屽悓鐞?/p>
鎸変笅绗笁銆佸洓涓敭鏃跺垯杈撳嚭
10
銆?/p>
11
銆?/p>
浠ユ鎺у埗璁＄畻鍣ㄧ殑璁?/p>
绠?/p>
鏂?/p>
娉?/p>
銆?
a[3..0]
b[1..0]
encode
inst11