Datasheet

183
8183F–AVR–06/12
ATtiny24A/44A/84A
21.1.1 Example
Calculate the expected current consumption in idle mode with USI, TIMER0, and ADC enabled
at V
CC
= 2.0V and f = 1 MHz. From Table 21-2 on page 183, third column, we see that we need
to add 5% for the USI, 10% for TIMER0, and 20% for the ADC. Reading from Figure 21-61 on
page 213, we find that current consumption in idle mode at 2V and 1 MHz is about 0.04 mA. The
total current consumption in idle mode with USI, TIMER0, and ADC enabled is therefore:
21.2 ATtiny24A
21.2.1 Current Consumption in Active Mode
Figure 21-1. Active Supply Current vs. Low Frequency
0.1 - 1.0 MHz, PRR = 0xFF
Table 21-2. Additional Current Consumption (percentage) in Active and Idle mode
PRR bit
Current consumption additional to
active mode with external clock
(see Figure 21-56 and Figure 21-57)
Current consumption additional to
idle mode with external clock
(see Figure 21-61 and Figure 21-62)
PRTIM1 1 % 5 %
PRTIM0 3 % 10 %
PRUSI 1 % 5 %
PRADC 5 % 20 %
ICCTOT 0,05mA 10,050,100,20+++()× 0,06mA≈≈
5.5 V
5.0 V
4.5 V
4.0 V
3.3 V
2.7 V
1.8 V
0
0,2
0,4
0,6
0,8
1
0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1
Frequency (MHz)
I
CC
(mA)