---- 整理自B站UP主 踌躇月光 的视频
1. 38译码器
1.1 真值表
A2 | A1 | A0 | O7 | O6 | O5 | O4 | O3 | O2 | O1 | O0 |
---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
O 0 = A 2 ‾ A 1 ‾ A 0 ‾ O 1 = A 2 ‾ A 1 ‾ A 0 O 2 = A 2 ‾ A 1 A 0 ‾ O 3 = A 2 ‾ A 1 A 0 O 4 = A 2 A 1 ‾ A 0 ‾ O 5 = A 2 A 1 ‾ A 0 O 6 = A 2 A 1 A 0 ‾ O 7 = A 2 A 1 A 0 \begin{aligned} O0 = \overline{A2}\overline{A1}\overline{A0} \\ O1 = \overline{A2}\overline{A1}{A0} \\ O2 = \overline{A2}{A1}\overline{A0} \\ O3 = \overline{A2}{A1}{A0} \\ O4 = {A2}\overline{A1}\overline{A0} \\ O5 = {A2}\overline{A1}{A0} \\ O6 = {A2}{A1}\overline{A0} \\ O7 = {A2}{A1}{A0} \\ \end{aligned} O0=A2A1A0O1=A2A1A0O2=A2A1A0O3=A2A1A0O4=A2A1A0O5=A2A1A0O6=A2A1A0O7=A2A1A0
1.2 电路实现
2. 存储器组织
前面章节我们已经实现了 1 Byte 的寄存器,现在我们需要利用 38 译码器实现 8 Byte 的寄存器。
3. 实验工程
【11 - 三八译码器和存储器组织】