A keyboard is a standard input device that sends unique signals to a computer when keys are pressed. These signals are called scan codes and they indicate which physical key was pressed. The computer receives the scan codes and uses its software and operating system to interpret the signals and translate them into letters, numbers, or other characters based on the keyboard layout. The interpretation of key presses is handled by the computer's software and operating system rather than just the hardware.

1. Operation of
input
peripherals
05 July 2022
Computer Architecture Keyboard
Gabriel Islas Peraza
Fátima Miranda Pestaña

2. 1 2
3
2
Definition
What is it?
A keyboard is a standard peripheral device
used to input text and other commands into
a computer.
It has several keys used to type letters,
numbers, and other characters.
A keyboard can be connected to a computer
using a USB cable or a wireless connection
and set communication between the PC and
the user.

3. When a user presses a key on a
keyboard, the keyboard sends a
unique signal to the computer.
The processing unit of the
computer receives the signal
and translates the signal to
know which key is pressed.
basically.

4. let's start:
In a modern computer, the interpretation of key presses is
generally left to the software: the information sent to the
computer, the scan code, tells it only which physical key
(or keys) was pressed or released.
A scancode (or scan code) is the data that most computer
keyboards send to a computer to report which keys have
been pressed. A number, or sequence of numbers, is
assigned to each key on the keyboard.
Releasing a key sends the
same code but with an
added byte.

5. How does the computer
understands keyboard
inputs
The signals sent by a keyboard are more position based than anything,
considering that there are multiple keyboard layouts, which is why you
have to set that up in the OS itself.

6. These positions are received by the PC, and are translated
using a Code Page (defines ascii characters with positions).
These characters are written into a memory buffer where
applications can receive them.
(Driver is also in charge of the LEDs for caps lock, scroll lock
and num lock.)

7. Thank you!
Have a nice
day.