Datasheet

18
11090BS–ATARM–22-Oct-13
SAM3S8/SD8 Summary
5.5.4 Low Power Mode Summary Table
The modes detailed above are the main low-power modes. Each part can be set to on or off sep-
arately and wake up sources can be individually configured. Table 5-1 below shows a summary
of the configurations of the low-power modes.
Notes: 1. When considering wake-up time, the time required to start the PLL is not taken into account. Once started, the device works
with the 4/8/12 MHz fast RC oscillator. The user has to add the PLL start-up time if it is needed in the system. The wake-up
time is defined as the time taken for wake up until the first instruction is fetched.
2. The external loads on PIOs are not taken into account in the calculation.
3. Supply Monitor current consumption is not included.
4. Total Current consumption.
5. 5 µA on VDDCORE, 15 µA for total current consumption (using internal voltage regulator), 8 µA for total current consumption
(without using internal voltage regulator).
6. Depends on MCK frequency.
7. In this mode the core is supplied and not clocked but some peripherals can be clocked.
Table 5-1. Low-power Mode Configuration Summary
Mode
SUPC,
32 kHz
Oscillator,
RTC, RTT
Backup
Registers,
POR
(Backup
Region) Regulator
Core
Memory
Peripherals Mode Entry
Potential Wake Up
Sources
Core at
Wake Up
PIO State
while in Low
Power Mode
PIO State
at Wake Up
Consumption
(2) (3)
Wake-up
Time
(1)
Backup
Mode
ON OFF
OFF
(Not powered)
WFE
+SLEEPDEEP
bit = 1
WUP0-15 pins
SM alarm
RTC alarm
RTT alarm
Reset
Previous
state saved
PIOA &
PIOB &
PIOC
Inputs with
pull ups
1.5 µA typ
(4)
< 0.1 ms
Wait
Mode
ON ON
Powered
(Not clocked)
WFE
+SLEEPDEEP
bit = 0
+LPM bit = 1
Any Event from: Fast
startup through
WUP0-15 pins
RTC alarm
RTT alarm
USB wake-up
Clocked
back
Previous
state saved
Unchanged 5 µA/15 µA
(5)
<10µs
Sleep
Mode
ON ON
Powered
(7)
(Not clocked)
WFE or WFI
+SLEEPDEEP
bit = 0
+LPM bit = 0
Entry mode =WFI
Interrupt Only; Entry
mode =WFE Any
Enabled Interrupt
and/or Any Event
from: Fast start-up
through WUP0-15
pins
RTC alarm
RTT alarm
USB wake-up
Clocked
back
Previous
state saved
Unchanged
(6) (6)