ATmega165 datasheet(290/336 Pages) ATMEL

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290

ATmega165/V

2573G–AVR–07/09

Figure 141. Idle Supply Current vs. V

CC (32 kHz Crystal)

Supply Current of I/O

modules

The tables and formulas below can be used to calculate the additional current consump-

tion 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 “Power Reduction

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

Table 121 for other V

CC and frequency settings than listed in Table 120.

IDLE SUPPLY CURRENT vs. VCC

32 kHz Crystal

25 ˚C

1.5

2.5

3.5

4.5

5.5

VCC (V)

Table 120.

Additional Current Consumption for the different I/O modules (absolute values)

PRR bit

Typical numbers

CC = 2V, F = 1MHz

CC = 3V, F = 4MHz

CC = 5V, F = 8MHz

PRADC

18 µA

116 µA

495 µA

PRUSART0

11µA

79 µA

313 µA

PRSPI

10 µA

72 µA

283 µA

PRTIM1

19 µA

117 µA

481 µA

Table 121.

Additional Current Consumption (percentage) in Active and Idle mode

PRR bit

Additional Current consumption

compared to Active with external

clock

(see Figure 132 and Figure 133)

Additional Current consumption

compared to Idle with external

clock

(see Figure 137 and Figure 138)

PRADC

5.6%

18.7%

PRUSART0

3.7%

12.4%

PRSPI

3.2%

10.8%

PRTIM1

5.6%

18.6%

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