32.2.1.1
Example 1
Calculate the expected current consumption in idle mode with USART0, TIMER1, and TWI
enabled at VCC = 2.0V and F = 1MHz. From Table 32-2 on page 393, third column, we see that
we need to add 17% for the USART0, 24% for the TWI, and 10% for the TIMER1 module. Read-
ing from Figure 32-6 on page 390, we find that the idle current consumption is ~0,15mA at VCC
=
2.0V and F = 1MHz. The total current consumption in idle mode with USART0, TIMER1, and
TWI enabled, gives:
ICCtotal ≈ 0,15mA • (1 + 0,17 + 0,24 + 0,10) ≈ 0,227mA
32.3 Power-down Supply Current
Figure 32-11. Power-down Supply Current vs. VCC (Watchdog Timer Disabled)
POWER-DOWN SUPPLY CURRENT vs. VCC
WATCHDOG TIMER DISABLED
4
3,5
3
85˚C
2,5
2
1,5
1
-40˚C
25˚C
0,5
0
1,5
2
2,5
3
3,5
4
4,5
5
5,5
VCC (V)
394
ATmega640/1280/1281/2560/2561
2549L–AVR–08/07
ATMEL [ ATMEL ]
