May 2024
Intermediate to advanced
534 pages
17h 58m
English
book
8051 Microcontroller, Internals, Instructions, Programming and Interfacing, 2nd Edition
by Subrata Ghoshal
Content preview from 8051 Microcontroller, Internals, Instructions, Programming and Interfacing, 2nd Edition
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351
SUMMARY
Power management is achieved by freezing a portion or
whole processor. Generally this is achieved by preventing
the clock input through the activation of some related gates.
The 8051 off ers two such modes for power management.
The first one, designated as idle mode, decreases
the power requirement of the processor by as much as
75 per cent. It halts the CPU of the processor, allowing all
other parts to function as they are. A hardware reset or
some enabled interrupt input is necessary to bring back
the CPU to its functional state.
The second one, designated as power-down mode,
decreases the power consumption by 99 per cent or
more ...
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