487
8271D–AVR–05/11
ATmega48A/PA/88A/PA/168A/PA/328/P
Figure 30-292.ATmega328: Idle Supply Current vs. Vcc (Internal RC Oscillator, 8MHz)
30.7.3 ATmega328 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
0.4
0.8
1.2
1.6
2
1.5 2 2.5 33.5 4 4.5 5 5.5
V
CC
(V)
I
CC
(mA)
Table 30-13. ATmega328: Additional Current Consumption for the different I/O modules (abso-
lute values)
PRR bit Typical numbers
V
CC
= 2V, F = 1MHz V
CC
= 3V, F = 4MHz V
CC
= 5V, F = 8MHz
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
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