Texas Instruments OMAP5912 Reference Manual page 605

Figure 24. OMAP5912 Shutdown Request Management
External
clocks, cut (6)
U
No external L
clocks request
P
D
System clock
32 MHz
SPRU753A
Standby wait for interruption signal (1)
Wake up interrupt signal
Chip idle
Control
request (2)
registers
chip
idle (5)
and
OMAP5912
Reference
clock, cut (6)
Clock
reset
Wake up event signals
32-kHz
clock
During the low-consumption states of deep sleep and big sleep, the ULPD
scans hardware events, interrupts, and external clock requests to restore the
clock reference system (or/and external clocks) and wake up the ARM926EJS
processor.
The main steps in the transition from the deep sleep or big sleep modes to the
awake mode are shown in Figure 25.
Power Management User Services
ARM926EJS
MPU (CP15) instruction
Standby decoded
idle x request
idle x acknowledge
idle x request
idle x acknowledge
idle x request
idle x acknowledge
idle x request (3)
idle x acknowledge (4)
Power Management
OMAP5912
module
OMAP5912
OMAP5912
OMAP5912
module x
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