Atmel ATmega328P Xplained Mini MEGA328P-XMINI MEGA328P-XMINI Data Sheet

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ATmega48A/PA/88A/PA/168A/PA/328/P [DATASHEET]

Atmel-8271H-AVR- ATmega-Datasheet_08/2014

The tables and formulas below can be used to calculate the additional current consumption for the different I/O 
modules in Active and Idle mode. The enabling or disabling of the I/O modules are controlled by the Power 
Reduction Register. See 

 for details.

It is possible to calculate the typical current consumption based on the numbers from 

for other V

CC

 and frequency settings than listed in 

Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled at V

CC

 = 2.0V 

and F = 1MHz. From 

, third column, we see that we need to add 10.3% for the 

TIMER1, 20.3% for the ADC, and 17.1% for the SPI module. Reading from 

, we find 

that the idle current consumption is ~0.027 mA at V

CC

 = 2.0V and F = 1MHz. The total current consumption in 

idle mode with TIMER1, ADC, and SPI enabled, gives:

PRUSART0

2.86µA

20.3µA

52.2µA

PRTWI

6.00µA

44.1µA

122.0µA

PRTIM2

4.97µA

33.2µA

79.8µA

PRTIM1

3.50µA

23.0µA

55.3µA

PRTIM0

 1.43µA

9.2µA

21.4µA

PRSPI

 5.01µA

38.6µA

111.4µA

PRADC

 6.34µA

45.7µA

123.6µA

PRUSART0

1.5%

8.9%

PRTWI

3.2%

19.5%

PRTIM2

2.4%

14.8%

PRTIM1

1.7%

10.3%

PRTIM0

0.7%

4.1%

PRSPI

2.9%

17.1%

PRADC

3.4%

20.3%

I

CC

total

0.027 mA (1 + 0.103 + 0.203 + 0.171)



0.040 mA



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