Datasheet

351
8025M–AVR–6/11
ATmega48P/88P/168P
Figure 30-56. Idle Supply Current vs. Vcc (Internal RC Oscillator, 8 MHz).
30.2.3 Supply Current of IO Modules
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 ”Power Reduction Register” on page 43 for
details.
85 °C
25 °C
-40 °C
0
0.5
1
1.5
2
2.5
3
1.5 2 2.5 3 3.5 4 4.5 5 5.5
V
CC
(V)
I
CC
(mA)
Table 30-3. Additional Current Consumption for the different I/O modules (absolute values)
PRR bit Typical numbers
V
CC
= 2V, F = 1MHz V
CC
= 3V, F = 4MHz V
CC
= 5V, F = 8MHz
PRUSART0 4.12 uA 26.7 uA 108.3 uA
PRTWI 8.96 uA 58.6 uA 238.2 uA
PRTIM2 9.94 uA 64.1 uA 256.3 uA
PRTIM1 8.81 uA 56.9 uA 227.0 uA
PRTIM0 2.29 uA 15.5 uA 62.3 uA
PRSPI 8.31 uA 56.8 uA 260.4 uA
PRADC 9.27 uA 58.4 uA 230.8 uA
Table 30-4. Additional Current Consumption (percentage) in Active and Idle mode
PRR bit
Additional Current consumption
compared to Active with external
clock (see Figure 30-47 on page
346 and Figure 30-48 on page
347)
Additional Current consumption
compared to Idle with external
clock (see Figure 30-52 on page
349 and Figure 30-53 on page
349)
PRUSART0 1.3% 8.0%
PRTWI 2.9% 17.6%
PRTIM2 3.2% 19.2%