Datasheet

PRR bit Typical numbers (µA)
V
CC
= 2V, F = 1 MHz V
CC
= 3V, F = 4 MHz V
CC
= 5V, F = 8 MHz
PRTIM2 5.2 35.2 149.5
PRTIM1 3.8 25.6 110.0
PRTIM0 1.5 9.8 39.6
PRSPI 5.2 40.0 199.6
PRADC 6.3 48.7 247.0
Table 34-4. ATmega88PA: Additional Current Consumption (Percentage) in Active and Idle mode
PRR bit Additional Current consumption
compared to Active with external clock
(see Figure 34-48 and Figure 34-49)
Additional Current consumption
compared to Idle with external clock (see
Figure 34-53 and Figure 34-54)
PRUSART0 1.8% 11.4%
PRTWI 3.9% 24.4%
PRTIM2 2.9% 18.6%
PRTIM1 2.1% 13.6%
PRTIM0 0.8% 5.2%
PRSPI 3.3% 21.5%
PRADC 4.2% 26.3%
It is possible to calculate the typical current consumption based on the numbers from the above table for
other V
CC
and frequency settings.
Related Links
14.12.3 PRR
34.2.3.1 Example
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled at V
CC
=
2.0V and F = 1 MHz. From Table Additional Current Consumption (percentage) in Active and Idle mode in
the previous section, third column, we see that we need to add 13.6% for the TIMER1, 26.3% for the
ADC, and 21.5% for the SPI module. Reading from Figure Idle Supply Current vs. Low Frequency
(0.1-1.0 MHz), we find that the idle current consumption is ~0.027mA at V
CC
= 2.0V and F = 1 MHz. The
total current consumption in idle mode with TIMER1, ADC, and SPI enabled, gives:
Icctotal  0.027mA(1+0.136+0.263+0.215)  0.043mA
Related Links
14.12.3 PRR
ATmega48PA/88PA/168PA
Typical Characteristics (TA = -40°C to 105°C)
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40002011A-page 428