ATmega325PA Atmel Corporation, ATmega325PA Datasheet - Page 338

• Manufacturer Part Number: ATmega325PA
• Manufacturer: Atmel Corporation

29.1.3.1
29.1.4
8285D–AVR–06/11
Power-down Supply Current
Example 1
ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P
It is possible to calculate the typical current consumption based on the numbers from
for other V
Calculate the expected current consumption in idle mode with USART0, TIMER1, and SPI
enabled at V
add 13.1% for the USART0, 13.0% for the SPI, and 13.2% for the TIMER1 module. Reading
from
1MHz. The total current consumption in idle mode with USART0, TIMER1, and SPI enabled,
gives:
Figure 29-11. ATmega165A: Power-down Supply Current vs. V
Figure
1.4
1.2
0.8
0.6
0.4
0.2
CC
1
0
29-6, we find that the idle current consumption is ~0.09 mA at V
CC
1.5
and frequency settings than listed in
= 3.0V and F = 1MHz. From
2
I
CC
total
≈
2.5
0.09mA
•
3
(
1
+
0.131
Table
V
CC
3.5
(V)
+
Table
29-2, second column, we see that we need to
0.13
+
4
29-1.
0.132
)
4.5
≈
CC
0.13mA
(Watchdog Timer Disabled)
5
CC
= 3.0V and F =
5.5
-45 °C
85 °C
25 °C
Table 29-2
338