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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342
POWER MANAGEMENT
Idle mode Power-down mode
Evoked by setting PCON.0 PCON.1
Terminated by Any enabled interrupt or hardware reset By hardware reset only
Power consumption 5 mA 100 μA
Condition of SFRs after exit Remain unchanged Initialized by respective reset values
Condition of internal RAM Unchanged Unchanged
Condition of ports during sleep Unchanged Unchanged
External interrupts, Timer/Counter
interrupts and serial interrupt
Remain active Go inactive
On-chip oscillator Remains active Goes inactive
Table 24.1 Comparison between idle and power-down modes
become non-functional during power-down mode, and, therefore, unlike the idle mode described in ...
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