Figure 29-12. Idle Supply Current vs. VCC (32 kHz External Oscillator)
IDLE SUPPLY CURRENT vs. VCC
32 kHz EXTERNAL OSCILLATOR
30
25
20
15
10
5
25 °C
0
1.5
2
2.5
3
3.5
4
4.5
5
5.5
VCC (V)
29.3 Supply Current of I/O 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 42 for
details.
Table 29-1. Additional Current Consumption for the different I/O modules (absolute values)
PRR bit
Typical numbers
VCC = 2V, F = 1MHz
VCC = 3V, F = 4MHz
51 uA
VCC = 5V, F = 8MHz
220 uA
PRUSART0
PRTWI
8.0 uA
12 uA
11 uA
5.0 uA
4.0 uA
15 uA
12 uA
75 uA
72 uA
32 uA
24 uA
95 uA
75 uA
315 uA
300 uA
130 uA
100 uA
400 uA
315 uA
PRTIM2
PRTIM1
PRTIM0
PRSPI
PRADC
322
ATmega48/88/168
2545M–AVR–09/07
ATMEL [ ATMEL ]
