ATMEGA640 datasheet(379/436 Pages) MICROCHIP

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379

ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]

DS40002211A

It is possible to calculate the typical current consumption based on the numbers from Table 32-1 on page 378 for

other VCC and frequency settings than listed in Table 32-2.

32.2.1.1

Example 1

Calculate the expected current consumption in idle mode with USART0, TIMER1, and TWI enabled at VCC = 2.0V

and F = 1MHz. From Table 32-2, third column, we see that we need to add 17% for the USART0, 24% for the TWI,

and 10% for the TIMER1 module. Reading from Figure 32-6 on page 376, we find that the idle current consumption

is ~0.15mA at VCC = 2.0V and F = 1MHz. The total current consumption in idle mode with USART0, TIMER1, and

TWI enabled, gives:

Table 32-2.

Additional Current Consumption (percentage) in Active and Idle mode

PRR bit

Additional Current consumption compared to

Active with external clock

Additional Current consumption compared to

Idle with external clock

PRUSART3

3.0%

17%

PRUSART2

3.0%

17%

PRUSART1

3.0%

17%

PRUSART0

3.0%

17%

PRTWI

4.4%

24%

PRTIM5

1.8%

10%

PRTIM4

1.8%

10%

PRTIM3

1.8%

10%

PRTIM2

4.3%

23%

PRTIM1

1.8%

10%

PRTIM0

1.5%

8.0%

PRSPI

3.3%

18%

PRADC

4.5%

24%

ICCtotal 0.15mA

10.170.240.10

+++





0.227mA



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