How is the keyboard and mouse interface of the PC connected to the CPU?

tommygina

How do we get the keyboard of a common PC and how does the mouse interface connect to the CPU?
Is it connected directly to the CPU?

Understanding friends help! I haven't studied hardware, and I am a little vague about the interface bus.

thank you all!

tanghm

The mouse is connected to the CPU through the USB interface, and communicates with the CPU through the keyboard or mouse protocol.

hiukim

It should be connected to the Southbridge chip, and then connected to the CPU and memory through the Northbridge
(I haven't studied hardware, I think it should be right)

shield

SUPER IO

prince_l

Of course, it is not directly connected. If the CPU is directly connected, the working efficiency of the CPU is too low, so these simple tasks are separated and more peripheral chips.
Regarding the definition of the interface, you can Baidu, a lot

冥王黑帝斯

Connected to the CPU through the device controller, interface circuit, etc., and the data transfer between the CPU and the CPU includes program query, program interrupt, DMA, channel control and I/O device control machine.