Atmel ATmega328P Xplained Mini MEGA328P-XMINI MEGA328P-XMINI Data Sheet
Product codes
MEGA328P-XMINI
328
ATmega48A/PA/88A/PA/168A/PA/328/P [DATASHEET]
Atmel-8271H-AVR- ATmega-Datasheet_08/2014
31.1.3 ATmega48A: Supply Current of IO 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. See
modules in Active and Idle mode. The enabling or disabling of the I/O modules are controlled by the Power
Reduction Register. See
for details.
for other V
CC
31.1.3.1 Example
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled at V
CC
= 2.0V
and F = 1MHz. From
, third column, we see that we need to add 11.2% for the TIMER1,
22.1% for the ADC, and 17.6% for the SPI module. Reading from
, we find that the idle
current consumption is ~0.028 mA at V
CC
= 2.0V and F = 1MHz. The total current consumption in idle mode with
TIMER1, ADC, and SPI enabled, gives:
Table 31-1.
ATmega48PA: Additional Current Consumption for the different I/O modules (absolute values)
PRR bit
Typical numbers
V
CC
= 2V, F = 1MHz
V
CC
= 3V, F = 4MHz
V
CC
= 5V, F = 8MHz
PRUSART0
2.9uA
20.7µA
97.4µA
PRTWI
6.0µA
44.8µA
219.7µA
PRTIM2
5.0µA
34.5µA
141.3µAµA
PRTIM1
3.6µA
24.4µA
107.7µA
PRTIM0
1.4µA
9.5µA
38.4µA
PRSPI
5.0µA
38.0µA
190.4µA
PRADC
6.1µA
47.4µA
244.7µA
Table 31-2.
ATmega48PA: Additional Current Consumption (percentage) in Active and Idle mode
PRR bit
Additional Current consumption
compared to Active with external
clock (see
compared to Active with external
clock (see
Additional Current consumption
compared to Idle with external
clock (see
compared to Idle with external
clock (see
)
PRUSART0
1.8%
11.4%
PRTWI
3.9%
20.6%
PRTIM2
2.9%
15.7%
PRTIM1
2.1%
11.2%
PRTIM0
0.8%
4.2%
PRSPI
3.3%
17.6%
PRADC
4.2%
22.1%
I
CC
total
0.028 mA (1 + 0.112 + 0.221 + 0.176)
0.042 mA