May 2024
Intermediate to advanced
889 pages
30h 8m
English
book
The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson
by Lyla B. Das
Content preview from The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson
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PERIPHERAL INTERFACING–I 9-49
9.12 | Hex Keyboard Interfacing
In Chapter 8, we discussed the ideas of interfacing a keyboard to the PC. It was seen that
specialized microcontrollers are used to handle all the issues associated with keyboard
interfacing. As such, the main processor of the PC is free of the task of identifying
the key pressed. However, still it is important to understand the mechanism of how a
keypress is detected and how the pressed key is identified. For this purpose, we use a
hexadecimal keyboard, which has 16 keys with the characters 0 to F. This keyboard is
interfaced to the 8086 through the port lines of the 8255. The pro ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.