ATmega3290P datasheet(340/385 Pages) ATMEL

340 / 385 page

340

8021E–AVR–07/09

ATmega329P/3290P

It is possible to calculate the typical current consumption based on the numbers from Table 28-

2 for other V

CC and frequency settings than listed in Table 28-1.

28.3.1

Example

Calculate the expected current consumption in idle mode with USART0, TIMER1, and SPI

enabled at V

CC = 3.0V and F = 1MHz.

Table 28-2 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 28-5, 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:

28.4

Power-down Supply Current

Figure 28-9. Power-down Supply Current vs. V

CC (Watchdog Timer Disabled)

PRSPI

2.7%

5.9%

PRTIM1

1.2%

2.6%

PRLCD

1.5%

3.2%

Table 28-2.

Additional Current Consumption (percentage) in Active and Idle mode

PRR bit

Additional Current consumption

compared to Active with external

clock

(see Figure 28-1 and Figure 28-2)

Additional Current consumption

compared to Idle with external clock

(see Figure 28-5 and Figure 28-6)

ICCtotal

0,21

0,049

0,059

0,026

+++

()

•

0,24

≈≈

POWER-DOWN SUPPLY CURRENT vs. VCC

WATCHDOG TIMER DISABLED

85 °C

25 °C

-40 °C

0.5

1.5

2.5

1.5

2.5

3.5

4.5

5.5

VCC (V)

ATmega3290P Datasheet(PDF) 340 Page - ATMEL Corporation

ATmega3290P Datasheet(HTML) 340 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL