Command cycle, machine cycle, clock cycle

Basic concepts of instruction cycle

The computer can work automatically because the CPU can take out a command from the memory of the stored program and execute this command. Then it is used to take the command and execute the command ......, This cycle forms a closed loop. This cycle will continue unless you encounter a shutdown command.

1 command cycle: the sum of the time when the CPU extracts a command from the memory and executes the command.

2 CPU cycle: it is also called the machine cycle. It takes a long time for the CPU to access the memory. Therefore, it is defined by the shortest time for reading a script from the memory.

3. clock cycle: generally referred to as the Cycle Pulse or T cycle. A cpu cycle contains several clock cycles.