Datasheet

38
Figure 3 shows the Power Management state diagram. In this diagram the entry and WAKEUP conditions for each power
down mode are given.
The following Modes of operation can be distinguished:
 NORMAL Mode
 Everything is running, this is the normal mode of operation when applications are executed on the ARM cores
 IDLE Mode
 CPU clocks are turned off
 IDLE state can be initiated by CPU using Software API
 The following WAKEUP sources can be used to return to NORMAL Mode:
 GPIO Interrupt, RTC Interrupt, AliveGPIO Interrupt (see PAE2, PAF:[1,2]), External IRQ
 STOP Mode
 PLL’s are turned off, DRAM goes into self-refresh
 STOP state can be initiated by CPU using Software API
 Certain WAKEUP sources or the ARTIK 530 Module AP_nBATTF signal can be used to transition to NORMAL Mode
 The following WAKEUP sources can be used to return to NORMAL Mode:
 RTC Interrupt, AliveGPIO Interrupt
For more information on how to access discussed WAKEUP mechanisms like AliveGPIO interrupts, GPIO Interrupts, RTC
Interrupts and External Interrupts, please refer to the Software User Guide.
POWER
ON
RESET
HOLD
STABLE
PLL0 &
PLL1
NORMAL
STOP
STABLE
X-TAL
STABLE
PLL0 &
PLL1
600µs
600µs
1
AP_nBATTF
AP_nBATTF
CPU REQUEST
WAKEUP
AP_nBATTF
60ms
1
1
IDLE
CPU REQUEST
WAKEUP