Datasheet

347
8021G–AVR–03/11
ATmega329P/3290P
Figure 29-9. ATmega329P: Idle Supply Current vs. V
CC
(Internal RC Oscillator, 1MHz)
29.1.3 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 ”PRR – Power Reduction Register” on
page 43 for details.
85 °C
25 °C
-40 °C
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.5 2 2.5 3 3.5 4 4.5 5 5.5
V
CC
(V)
I
CC
(mA)
Table 29-1. ATmega329P: 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
PRADC 19µA 102µA 395µA
PRUSART0 9µA 57µA 240µA
PRSPI 11µA 68µA 276µA
PRTIM1 5µA 30µA 116µA
PRLCD 6µA 38µA 150µA
Table 29-2. ATmega329P: Additional Current Consumption (percentage) in Active and Idle
mode
PRR bit
Additional Current consumption
compared to Active with external
clock
(see Figure 29-1 and Figure 29-3)
Additional Current consumption
compared to Idle with external clock
(see Figure 29-6 and Figure 29-7)
PRADC 4.2% 9.0%
PRUSART0 2.3% 4.9%
PRSPI 2.7% 5.9%
PRTIM1 1.2% 2.6%
PRLCD 1.5% 3.2%