Peripheral Power Consumption

Default conditions, except where noted:

Operating conditions
- V_VDDIN = 3.3 V
Oscillators
- XOSC (crystal oscillator) stopped
- XOSC32K (32 kHz crystal oscillator) running with external 32 kHz crystal
- OSC8M at 8 MHz
Clocks
- OSC8M used as main clock source
- CPU, AHB, and APBn clocks undivided
The following AHB module clocks are running: NVMCTRL, HPB2 bridge, HPB1 bridge, HPB0 bridge
- All other AHB clocks stopped
The following peripheral clocks running: PM, SYSCTRL
- All other peripheral clocks stopped
I/Os are inactive with internal pull-up
CPU in IDLE0 mode
Cache enabled
BOD33 disabled

In this default conditions, the power consumption I_default is measured.

Operating mode for each peripheral in turn:

Configure and enable the peripheral GCLK (When relevant, see conditions)
Unmask the peripheral clock
Enable the peripheral (when relevant)
Set CPU in IDLE0 mode
Measurement I_periph
Wake-up CPU through EIC (async: level detection, filtering disabled)
Disable the peripheral (when relevant)
Mask the peripheral clock
Disable the peripheral GCLK (when relevant, see conditions)

Each peripheral power consumption details provided in table x-9 is the value (I_periph - I_default), using the same measurement method as for global power consumption measurement.

Table 1. Typical Peripheral Power Consumption
Peripheral	Conditions	Typ.	Units
RTC	f_{GCLK_RTC} = 32 kHz, 32 bit counter mode	6.2	μA
WDT	f_{GCLK_WDT} = 32 kHz, normal mode with EW	3.4
AC	Both f_GCLK = 8 MHz, Enable both COMP	116.0
TCx⁽¹⁾	f_GCLK = 8 MHz, Enable + COUNTER in 8 bit mode	42.3
SERCOMx.I2CM⁽²⁾	f_GCLK = 8 MHz, Enable	76.9
SERCOMx.I2CS⁽²⁾	f_GCLK = 8 MHz, Enable	36.5
SERCOMx.SPI⁽²⁾	f_GCLK = 8 MHz, Enable	70.6
SERCOMx.USART⁽²⁾	f_GCLK = 8 MHz, Enable	88.0

Notes:

1.All TCs share the same power consumption values.
2.All SERCOMs share the same power consumption values.