33.7 Peripherals Power Consumption

The table below can be used to calculate the additional current consumption for the different I/O peripherals in the various operating modes.

Some peripherals will request the clock to be enabled when operating in STANDBY. See the peripheral section for further information.

Operating conditions:
  • VDD = 3V
  • T = 25°C
  • OSC20M at 1 MHz used as the system clock source, unless otherwise specified
  • In Idle sleep mode, unless otherwise specified
Table 33-7. Peripherals Power Consumption
PeripheralConditionsTyp.(1)Unit
BODContinuous19µA
Sampling @ 1 kHz1.2
TCA16-bit count @ 1 MHz13µA
TCB16-bit count @ 1 MHz7.4µA
RTC16-bit count @ OSCULP32K1.2µA
WDT (including OSCULP32K)0.7µA
OSC20M130µA
ACLow-Power mode disabled(2)92µA
Low-Power mode enabled(2)45
ADC(3)CLK_ADC = 1MHz, VREF = Internal 2.048V380µA
XOSC32KCL = 7.5 pF0.5µA
OSCULP32K0.4µA
USARTEnable @ 9600 Baud13µA
SPI (Host)Enable @ 100 kHz2.1µA
TWI (Host)Enable @ 100 kHz24µA
TWI (Client)Enable @ 100 kHz17µA
Flash programming Erase Operation1.5mA
Write Operation3.0
Note:
  1. Current consumption of the module only. To calculate the total internal power consumption of the microcontroller, power consumption values of all the peripherals and the clock sources used must be added to the base power consumption given in the Power Consumption section in electrical characteristics.
  2. CPU in Standby mode.
  3. Average power consumption with ADC active in Free-Running mode.