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 14.5% for the TIMER1, 22.1% for 

the ADC, and 15.7% for the SPI module. Reading from 

, we find that the idle current 

consumption is ~0.055 mA at V

CC

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

TIMER1, ADC, and SPI enabled, gives: 

PRUSART0

3.20 µA

22.17 µA

100.25 µA

PRTWI

7.34 µA

46.55 µA

199.25 µA

PRTIM2

7.34 µA

50.79 µA

224.25 µA

PRTIM1

6.19 µA

41.25 µA

176.25 µA

PRTIM0

1.89 µA

14.28 µA

61.13 µA

PRSPI

6.94 µA

43.84 µA

186.50 µA

PRADC

8.66 µA

61.80 µA

295.38 µA

PRUSART0

1.4%

7.8%

PRTWI

3.0%

16.6%

PRTIM2

3.3%

17.8%

PRTIM1

2.7%

14.5%

PRTIM0

0.9%

4.8%

PRSPI

2.9%

15.7%

PRADC

4.1%

22.1%

I

CC

total

0.045 mA (1 + 0.145 + 0.221 + 0.157)



0.069 mA

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