Design and Implementation of computer hardware

Info inf com is the basic design of the digital circuit.

The foundation of computer hardware is logical circuits,

Logical Circuits can be called the genes or cells of computer hardware.

 

The basic unit of a logical circuit is "command switch ",

It can be said that the command switch is the gene or cell of intelligent hardware (digital circuit.

 

Let's take a look at how a command switch is designed and implemented:

 

The command switch is to input commands at the input end and output control signals at the output end.

Take the four-digit command as an example. The four-digit command can have 16 commands, for example, 0001,001 0, 0011,010 0 ,...... 1111.

0000 indicates that no command is entered.

 

The control signals are 0 and 1.

Usually 0 indicates no voltage, the controlled circuit is not connected, 1 indicates positive voltage, and the controlled circuit is connected. When the controlled circuit is connected, the corresponding commands are executed.

 

A command switch is composed of a door circuit, which is the basic unit of a logical circuit.

Let's take a look at the logic circuit design diagram of the command switch for the "1001" command:

We can see that the input end has four pins and the output end has one pin,

When "1001" is input at the input end, "1" is output at the output end, and "1" is a positive voltage. Therefore, the corresponding execution circuit of the 1001 command is connected, that is, the execution command is started.

When the input is not "1001", the output is "0 ".

 

 

 

 

 

 

Design and Implementation of computer hardware