Datasheet

378
8021G–AVR–03/11
ATmega329P/3290P
It is possible to calculate the typical current consumption based on the numbers from Table 29-4
for other V
CC
and frequency settings than listed in Table 29-3.
29.2.4 Example
Calculate the expected current consumption in idle mode with USART0, TIMER1, and SPI
enabled at V
CC
= 3.0V and F = 1MHz. Table 29-4 shows that we need to add 4.9% for the
USART0, 5.9% for the SPI, and 2.6% for the TIMER1 module. From Figure 29-63, we find that
the idle current consumption is ~0.21mA at V
CC
= 3.0V and F = 1MHz. The total current con-
sumption in idle mode with USART0, TIMER1, and SPI enabled, gives:
29.2.5 Power-down Supply Current
Figure 29-67. ATmega3290P: Power-down Supply Current vs. V
CC
(Watchdog Timer Disabled)
ICCtotal 0.21mA 1 0.049 0.059 0.026+++()• 0.24mA≈≈
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
(uA)