(1)(1011.10101)2 =(13.52)8=(0B.A8)16=(11.65625)10 (2)(1110.11001)2 =(16.62)8=(0E.C8)16=(14.78125)10 (3)(110110.111)2 =(66.7)8=(36.E )16=(54.875)10 (4)(10101.0011)2 =(25.14)8=(15.3)16=(21.1875)10 1-2 (1)(105.625)10 =(1101001.101)2=(69.A )16 (2)(27/64)10 =(0.011011)2=(0.6C )16 (3)(37.4)10 =(100101. 01100110)2=(25.66)16 (4)(42.375)10 =(101010. 011)2=(2A.6)16 (5)(62/128)10 =(0.0111110)2=(0.7C )16 (6)(9.46)10 =(1001. 01110101)2=(9.75)16 1-3 (1)(AB.7)16 =(10101011. 0111)2=(171.4375)10 (2)(3A.D )16 =(111010. 1101)2=(58.8125)10 (3)(5F.C8)16 =(1011111. 11001)2=(95.78125)10 (4)(2E.9)16 =(101110. 1001)2=(46.5625)10 1-4
(1)真值表 (2)真值表
逻辑函数表达式: 逻辑函数表达式:
1-5
(1)反函数: 对偶函数:
(2)反函数: 对偶函数:
(3)反函数: 对偶函数:
(4)反函数: 对偶函数: C
B A
C AB BC A C B A F +++⋅⋅=ABC
D D C AB D C B A D C B A D BC A D C B A CD B A D C B A F +⋅++⋅++⋅+⋅+⋅⋅⋅=ABC C A B A A C B A F =⋅+=+⋅+=)()(A C B A F +⋅+=)('C B A C B A B A C B A B A F )()()()(⊕=⋅⋅+⋅=⋅+⋅+=C
B A B A F ⋅+⋅+=)()('))()(())((E D B
C A C B A F ++⋅+⋅⋅+=))()(()(E
D B C A C B A ++⋅+⋅++=))()(())(('
E D B C A C B A
F ++⋅+⋅⋅+=)
()('D C A C B A C A F ++⋅+++⋅=D C A C A ⋅⋅+⋅=)()(D C A C B A C A F ++⋅+++⋅=
1-9
1-18
1-19
1-7
1-8
校验位在左边
校验位在右边
数据奇校验码偶校验码奇校验码偶校验码1011101011101110101010111010110111010111011101010011011001
0011011001
1011011001
0110110010
0110110011
字符
S f $回车空格二进制10100111100110010010000011010100000ASCII 码
十六进制
53H
66H
24H
0DH
20H
十进制数8421 BCD 码余3码格雷码290010 10010101 110010011620110 00101001 01010100001680110 10001001 1011110011017
0001 0111
0100 1010
11001
1-11
可配项或类似卡诺图方法1-13
1-14
1-15
1-16
根据真值表得逻辑表达式:
D
F⋅
C
B
+
A
+
+
=
D
⋅
⋅
+
⋅
DC
B
B
A
CB
C
A
D
D
B
C
A
A
C
D
B
B
A
DC
A
D
C
A
B
A
C
D
B
⋅
+
+
+
=
约束条件
⋅
+
⋅DCBA
A
⋅
⋅
⋅
+
DCB
如果不利用约束项化简:
化简后得:
如果利用约束条件:
化简后得:
A
C D A C D A B C F ⋅++⋅=约束条件
=+++⋅+⋅⋅+⋅⋅⋅DCBA A DCB A B DC A B C D A B C D A B C D A
F =约束条件
=++⋅⋅DCBA A B DC A B C D。