Datasheet

Figure 34-10. ATmega48PA: Idle Supply Current vs. V
CC
(Internal RC Oscillator, 8 MHz)
105°C
85°C
25°C
-40°C
0.2
0.
3
0.4
0.5
0.6
0.7
0.
8
0.9
1
1.1
1.2
1.
3
1.5 2 2.5 3 3.5 4 4.5 5 5.5
V
CC
(V)
I
CC
(mA)
34.1.3 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 the Power Reduction Register section for details.
Table 34-1. ATmega48PA: Additional Current Consumption for the Different I/O Modules (Absolute
Values)
PRR Bit Typical Numbers (µA)
V
CC
= 2V, F = 1 MHz V
CC
= 3V, F = 4 MHz V
CC
= 5V, F = 8 MHz
PRUSART0 2.9 20.7 97.4
PRTWI 6.0 44.8 219.7
PRTIM2 5.0 34.5 141.3
PRTIM1 3.6 24.4 107.7
PRTIM0 1.4 9.5 38.4
PRSPI 5.0 38.0 190.4
PRADC 6.1 47.4 244.7
Table 34-2. ATmega48PA: Additional Current Consumption (Percentage) in Active and Idle mode
PRR bit Additional Current consumption
compared to Active with external clock
(see Figure 34-1 and Figure 34-2)
Additional Current consumption
compared to Idle with external clock (see
Figure 34-6 and Figure 34-7)
PRUSART0 1.8% 11.4%
PRTWI 3.9% 20.6%
ATmega48PA/88PA/168PA
Typical Characteristics (TA = -40°C to 105°C)
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40002011A-page 403