Three different sleep modes can be enabled to reduce power consumption.
1 ’. The power consumption is dependent on the
enabled functionality. | |
1 ’. |
Refer to the Wake-up Time section for information on how the wake-up time is affected by the different sleep modes.
Peripheral | Active in Sleep Mode | |||
---|---|---|---|---|
Idle | Standby | Power-Down | ||
HTLLEN =
0 |
HTLLEN =
1 |
|||
CPU | ||||
RTC | X | X(1, 2) | X(2) | X(2) |
WDT | X | X | X | X |
BOD | X | X | X | X |
EVSYS | X | X | X | X |
CCL | X | X(1) | ||
AC | ||||
ADC | ||||
DAC | ||||
ZCD | ||||
TCA | ||||
TCBn | ||||
All other peripherals | X |
In Standby sleep mode, only the RTC functionality requires the RUNSTDBY bit to be set.
In Power-Down sleep mode, only the PIT functionality is available.
Clock Source | Active in Sleep Mode | |||
---|---|---|---|---|
Idle | Standby | Power-Down | ||
HTLLEN =
0 |
HTLLEN =
1 |
|||
Main clock source | X | X(1) | ||
RTC clock source | X | X(1, 2) | X(2) | X(2) |
WDT oscillator | X | X | X | X |
BOD oscillator(3) | X | X | X | X |
CCL clock source | X | X(1) | ||
TCD clock source | X |
In Standby sleep mode, only the RTC functionality requires the RUNSTDBY bit to be set.
In Power-Down sleep mode, only the PIT functionality is available.
Wake-Up Sources | Active in Sleep Mode | |||
---|---|---|---|---|
Idle | Standby | Power-Down | ||
HTLLEN =
0 |
HTLLEN =
1 |
|||
PORT Pin interrupt | X | X | X(1) | X(1) |
BOD VLM interrupt | X | X | X | X |
MVIO interrupts | X | X | X | X |
RTC interrupts | X | X(2, 3) | X(3) | X(3) |
TWI Address Match interrupt | X | X | X | |
CCL interrupts | X | X | X(4) | |
USART Start-Of-Frame interrupt | X | |||
TCA interrupts | X | X(2) | ||
TCBn interrupts | ||||
ADC interrupts | ||||
AC interrupts | ||||
ZCD interrupts | ||||
All other interrupts | X |
In Standby sleep mode, only the RTC functionality requires the RUNSTDBY bit to be set.
In Power-Down sleep mode, only the PIT functionality is available.
0x0
and EDGEDET = 0x0
in the CCL.LUTnCTRLA
register).