7段数码管驱动电路表达式
时间: 2023-06-01 16:02:42 浏览: 77
7段数码管驱动电路表达式可以表示为:
A = ~(B & C & ~D) | (~B & C & D) | (B & ~C & D) | (B & C & D)
B = ~(E & F & G) | (~E & ~F & G) | (~E & F & ~G) | (E & F & G)
C = ~(E & F & ~G) | (~E & ~F & ~G) | (E & ~F & G) | (E & F & G)
D = ~(B & C & ~E & ~F) | (~B & ~C & E & F) | (~B & C & ~E & ~F) | (B & C & E & F)
E = ~(A & ~D & ~E & ~F & ~G) | (~A & ~C & D & E & ~F & ~G) | (~A & B & C & ~D & ~E & ~F) | (~A & B & C & D & E & F & G)
F = ~(A & ~B & ~C & ~D & ~G) | (~A & B & C & D & ~E & ~F) | (~A & B & C & D & E & ~F & ~G) | (A & B & C & ~D & ~E & ~F & G)
G = ~(A & ~B & ~C & ~D & ~E & ~F) | (~B & C & ~D & ~E & ~F & G) | (B & ~C & ~E & ~F & G) | (A & B & C & D & E & F & ~G)
相关问题
7段数码管驱动电路逻辑表达式
假设7段数码管的a~g七个段分别对应输出端口A~G,且低电平有效,则7段数码管的驱动电路逻辑表达式如下:
A = ~ (d | e & g | b & c & ~f | a & ~b & ~c & ~d & ~e & ~g)
B = ~ (c & ~g | b & ~c & ~d | f & ~g | a & ~b & ~d & ~e & ~g)
C = ~ (b & c | a & ~d & ~e & ~g | a & ~b & ~c & ~g | f & ~g)
D = ~ (b & c & ~e | a & ~c & ~d & ~f & ~g | a & ~b & ~c & ~d & ~g | f & ~g)
E = ~ (a & ~b & ~c & ~d & ~g | a & ~b & ~c & ~e & ~g | b & c & ~d & ~e | f & ~g)
F = ~ (a & ~e & ~f & ~g | b & ~c & ~e & ~g | a & ~b & ~c & ~f & ~g | d & ~e & ~g)
G = ~ (a & ~c & ~d & ~e & ~g | a & ~b & ~c & ~d & ~f & ~g | b & c & ~e & ~f | f & ~g)
其中, "|" 表示逻辑或运算, "&" 表示逻辑与运算, "~" 表示逻辑非运算。
7段数码管驱动电路真值表
7段数码管驱动电路是数字电路中常见的一种电路,用于显示数字和一些字母符号。该电路由多个逻辑门和驱动芯片组成,其中最常见的是7447和7448芯片。下面是7447和7448芯片的真值表:
7447芯片真值表:
| A | B | C | D | a | b | c | d | e | f | g |
|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 |
| 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
| 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 1 |
| 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 1 |
| 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 |
| 0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 |
| 0 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 |
| 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 |
| 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
7448芯片真值表:
| A | B | C | D | LT | a | b | c | d | e | f | g |
|---|---|---|---|----|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 |
| 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
| 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 1 |
| 0 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 1 |
| 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 1 |
| 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 |
| 0 | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 |
| 0 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
| 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 |
| 1 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 |
| 1 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 |
| 1 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 1 |
| 1 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 1 | 1 |
| 1 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 1 | 1 |
| 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
其中,a、b、c、d、e、f、g是数码管的7个LED段,分别对应显示数字0~9、字母A~F等。LT是锁存器输入,用于锁定当前显示的数字或字母。