SA1110 Datasheet, PDF (102/406 Pages) Intel Corporation – Intel StrongARM SA-1110 Microprocessor

System Control Module
Figure 9-3.
Table 9-2 summarizes what power and clock supplies are used by each module within the SA-1110,
as well as the status of the power and clock supplies to each unit during each of the three
power-related modes.
Transitions Between Modes of Operation
nRESET asserted
Power on, nRESET asserted
HARDWARE RESET
nRESET
negated
nRESET
asserted
nRESET asserted
Wait for interrupt
instruction
RUN
Force sleep bit set, or VDD or
battery fault pins asserted
System or
peripheral unit
interrupt
GPIO or RTC
alarm interrupt
IDLE
CPU clock held low; all
other resources active, wait
for interrupt
VDD or battery fault
pins asserted
SLEEP
Wait for wake-up
event
9-32
SA-1110 Developer’s Manual