Datasheet

198

8197C–AVR–05/11

ATtiny261A/461A/861A

It is possible to calculate the typical current consumption based on the numbers from Table 20-1

for other V

and frequency settings than listed in Table 20-2.

20.1.1 Example

Calculate the expected current consumption in idle mode with TIMER0, ADC, and USI enabled

at V

= 2.0V and F = 1 MHz. From Table 20-2, third column, we see that we need to add 10%

for the TIMER0, 27.3 % for the ADC, and 6.5 % for the USI module. Reading from Figure 20-6

on page 201, we find that the idle current consumption is ~0,085 mA at V

= 2.0V and

F = 1 MHz. The total current consumption in idle mode with TIMER0, ADC, and USI enabled,

gives:

Table 20-2. Additional Current Consumption (percentage) in Active and Idle mode.

PRR bit

Additional Current consumption

compared to Active with external

clock (see Figure 20-1 on page

199 and Figure 20-2 on page 199)

Additional Current consumption

compared to Idle with external

clock (see Figure 20-6 on page

201 and Figure 20-7 on page 202)

PRTIM1 20...25 % 100 %

PRTIM0 2...3 % 10...15 %

PRUSI 2...12 % 10...50%

PRADC 15...100 % 50...500 %

ICCtotal 0.085mA 10.100.2730.065++ +()• 0.122mA≈≈