A000046 Arduino, A000046 Datasheet - Page 332
![MCU, MPU & DSP Development Tools Uno](/photos/15/92/159298/arduinounofront_sml.jpg)
A000046
Manufacturer Part Number
A000046
Description
MCU, MPU & DSP Development Tools Uno
Manufacturer
Arduino
Series
-r
Type
MCUr
Specifications of A000046
Processor To Be Evaluated
ATmega328
Interface Type
USB, I2C, SPI
Dimensions
2.7 in x 2.1 in
Operating Supply Voltage
5 V
Contents
Board
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
ATmega328
- Current page: 332 of 448
- Download datasheet (13Mb)
29.1.3
Example
8161D–AVR–10/09
ATmega48PA: 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
details.
Table 29-1.
Table 29-2.
It is possible to calculate the typical current consumption based on the numbers from
on page 332
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
to add 11.2% for the TIMER1, 22.1% for the ADC, and 17.6% for the SPI module. Reading from
Figure 29-6 on page 329
and F = 1MHz. The total current consumption in idle mode with TIMER1, ADC, and SPI enabled,
gives:
PRR bit
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRSPI
PRADC
PRR bit
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRSPI
PRADC
CC
= 2.0V and F = 1MHz. From
for other V
ATmega48PA: Additional Current Consumption for the different I/O modules
(absolute values)
ATmega48PA: Additional Current Consumption (percentage) in Active and Idle
mode
Typical numbers
2.9 uA
6.0 uA
5.0 uA
3.6 uA
Additional Current consumption
compared to Active with external
clock (see
327
1.8%
3.9%
2.9%
2.1%
0.8%
3.3%
4.2%
1.4 uA
6.1 uA
5.0 uA
V
CC
and
I
= 2V, F = 1 MHz
CC
CC
, we find that the idle current consumption is ~0.028 mA at V
total
Figure 29-2 on page
and frequency settings than listed in
≈
Figure 29-1 on page
0.028 mA (1 + 0.112 + 0.221 + 0.176)
ATmega48PA/88PA/168PA/328P
Table 29-2 on page
⋅
20.7 uA
44.8 uA
34.5 uA
24.4 uA
9.5 uA
38.0 uA
47.4 uA
V
CC
327)
= 3V, F = 4 MHz
”Power Reduction Register” on page 42
Additional Current consumption
compared to Idle with external
clock (see
329
11.4%
20.6%
15.7%
11.2%
4.2%
17.6%
22.1%
332, third column, we see that we need
and
Figure 29-7 on page
≈
Table 29-1 on page
Figure 29-6 on page
0.042 mA
97.4 uA
219.7 uA
141.3 uA
107.7 uA
38.4 uA
190.4 uA
244.7 uA
V
CC
= 5V, F = 8 MHz
330)
332.
Table 29-2
CC
= 2.0V
332
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