3.2.1 Sleep Modes

A clarification has been made to Table 12-2 Sleep Mode Activity Overview in the data sheet, where the single table has been split into three separate tables for clarity. Functional changes are shown in bold.

Table 3-1. Sleep Mode Activity Overview for Peripherals
Peripheral	Active in Sleep Mode
Peripheral	Idle	Standby	Power-Down
CPU	-	-	-
RTC	X	X⁽¹⁾	X⁽²⁾
WDT	X	X	X
BOD	X	X	X
EVSYS	X	X	X
CCL	X	X⁽¹⁾	-
ACn
ADCn/PTC
TCBn
All other peripherals	X	-	-

Note:

The RUNSTBY bit of the corresponding peripheral must be set to enter the active state.
PIT only.

Table 3-2. Sleep Mode Activity Overview for Clock Sources
Clock Source	Active in Sleep Mode
Clock Source	Idle	Standby	Power-Down
Main clock source	X	X⁽¹⁾	-
RTC clock source	X	X⁽¹⁾	X⁽²⁾
WDT oscillator	X	X	X
BOD oscillator⁽³⁾	X	X	X
CCL clock source	X	X⁽¹⁾	-

Note:

The RUNSTBY bit of the corresponding peripheral must be set to enter the active state.
PIT only.
The BOD oscillator runs only in Sampled mode.

Table 3-3. Sleep Mode Wake-Up Sources
Wake-Up Sources	Active in Sleep Mode
Wake-Up Sources	Idle	Standby	Power-Down
PORT Pin Interrupt	X	X	X⁽¹⁾
BOD VLM interrupt	X	X	X
RTC interrupts	X	X⁽²⁾	X⁽³⁾
TWIn Address Match interrupt	X	X	X
USARTn Start-of-Frame interrupt	-	X	-
TCBn interrupts	X	X⁽²⁾	-
ADCn/PTC interrupts	X	X⁽²⁾	-
ACn interrupts	X	X⁽⁴⁾	-
All other interrupts	X	-	-

Note:

The I/O pin must be configured according to Asynchronous Sensing Pin Properties in the PORT section.
The RUNSTBY bit of the corresponding peripheral must be set to enter the active state.
PIT only.
When the RUNSTDBY bit is set, the AC will operate without updating its Status register or triggering interrupts. If another peripheral has requested CLK_PER, the AC will use the clock to update the Status register and trigger interrupts.

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