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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9-60
THE
x86 MICROPROCESSORS
l The steeper motor needs more current than can be supplied by the 8255. Hence,
current driver transistors /ICs are used in such circuits.
l For understanding how keyboards operate, a hex keyboard can be used.
l LEDs are popular displays, but they draw a lot of current. Hence, seven segment digit
LEDs are used in a multiplexed fashion.
QUESTIONS
1. What is the special feature of Port C when used in the following modes?
a) Mode 0
b) Mode 1
2. What does the term handshaking mean to you?
3. What is the importance of the BSR mode of the 8255?
4. Distinguish between the SPP and EPP protocols.
5. How can we operate ...
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