Datasheet

Figure 34-57. ATmega88A: Idle Supply Current vs. V
CC
(Internal RC Oscillator, 8 MHz)
IDLE SUPPLY CURRENT vs. V
CC
INTERNAL RC OSCILLATOR, 8 MHz
85 °C
25 °C
-40 °C
0
0.3
0.6
0.9
1.2
1.5 2 2.5 3 3.5 4 4.5 5 5.5
V
CC
(V)
I
CC
(mA)
34.2.3 Supply Current of I/O Modules
The tables and formulas below can be used to calculate the additional current consumption 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 (PRR). See Power Reduction Register section for details.
Table 34-3. Additional Current Consumption for the Different I/O Modules (Absolute Values)
PRR bit Typical numbers
V
CC
= 2V, F = 1 MHz V
CC
= 3V, F = 4 MHz V
CC
= 5V, F = 8 MHz
PRUSART0 3.0μA 21.3μA 97.9μA
PRTWI 6.1μA 45.4μA 219.0μA
PRTIM2 5.2μA 35.2μA 149.5μA
PRTIM1 3.8μA 25.6μA 110.0μA
PRTIM0 1.5μA 9.8μA 39.6μA
PRSPI 5.2μA 40.0μA 199.6μA
PRADC 6.3μA 48.7μA 247.0μA
Table 34-4. 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%
ATmega48A/88A/168A
Typical Characteristics (TA = -40°C to 85°C)
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40002007A-page 423