ATMEGA168PV_14 Datasheet, PDF (376/420 Pages) ATMEL Corporation – High Endurance Non-volatile Memory Segments

Table 30-6. Additional Current Consumption (percentage) in Active and Idle mode
PRR bit
Additional Current consumption
compared to Active with external
clock (see Figure 30-93 on page
370 and Figure 30-94 on page
371)
Additional Current consumption
compared to Idle with external
clock (see Figure 30-98 on page
373 and Figure 30-99 on page
373)
PRUSART0
1.9%
8.5%
PRTWI
3.4%
15.6%
PRTIM2
3.6%
16.5%
PRTIM1
3.4%
15.2%
PRTIM0
0.8%
3.7%
PRSPI
3.5%
15.8%
PRADC
3.2%
14.5%
Example
It is possible to calculate the typical current consumption based on the numbers from Table 30-6
on page 376 for other V_CC and frequency settings than listed in Table 30-5 on page 375.
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V_CC = 2.0V and F = 1MHz. From Table 30-6 on page 376, third column, we see that we need
to add 15.2% for the TIMER1, 14.5% for the ADC, and 15.8% for the SPI module. Reading from
Figure 30-98 on page 373, we find that the idle current consumption is ~0.055 mA at V_CC = 2.0V
and F = 1MHz. The total current consumption in idle mode with TIMER1, ADC, and SPI enabled,
gives:
ICCtotal ≈ 0.065 mA ⋅ (1 + 0.152 + 0.145 + 0.158) ≈ 0.095 mA
30.3.4 Power-down Supply Current
Figure 30-103.Power-Down Supply Current vs. V_CC (Watchdog Timer Disabled).
1.6
85 °C
1.4
1.2
1
0.8
0.6
0.4
25 °C
0.2
-40 °C
0
1.5
2
2.5
3
3.5
4
4.5
5
5.5
V_CC (V)
376 ATmega48P/88P/168P
8025M–AVR–6/11