ATMEGA328P-20PU Atmel, ATMEGA328P-20PU Datasheet - Page 351

• Manufacturer Part Number: ATMEGA328P-20PU
• Manufacturer: Atmel

Specifications of ATMEGA328P-20PU

• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Interface Type: SPI/TWI/USART
• Program Memory Type: Flash
• Program Memory Size: 32KB
• Total Internal Ram Size: 2KB
• # I/os (max): 23
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 6-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 28
• Package Type: PDIP
• Lead Free Status / Rohs Status: Compliant

29.2.3
Example
8025K–AVR–10/09
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 29-3.
Table 29-4.
It is possible to calculate the typical current consumption based on the numbers from
on page 351
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
to add 17.0% for the TIMER1, 17.6% for the ADC, and 17.5% for the SPI module. Reading from
Figure 29-52 on page 348
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
Additional Current Consumption for the different I/O modules (absolute values)
Additional Current Consumption (percentage) in Active and Idle mode
Typical numbers
4.12 uA
8.96 uA
9.94 uA
8.81 uA
Additional Current consumption
compared to Active with external
clock (see
346
346)
1.3%
2.9%
3.2%
2.8%
0.8%
3.0%
2.9%
2.29 uA
9.27 uA
8.31 uA
V
CC
and
I
CC
= 2V, F = 1MHz
CC
, we find that the idle current consumption is ~0.055 mA at V
total
Figure 29-48 on page
and frequency settings than listed in
≈
Figure 29-47 on page
0.055 mA (1 + 0.170 + 0.176 + 0.175)
Table 29-4 on page
⋅
26.7 uA
58.6 uA
64.1 uA
56.9 uA
15.5 uA
56.8 uA
58.4 uA
V
CC
= 3V, F = 4MHz
”Power Reduction Register” on page 42
ATmega48P/88P/168P
Additional Current consumption
compared to Idle with external
clock (see
348
349)
8.0%
17.6%
19.2%
17.0%
4.6%
17.5%
17.6%
351, third column, we see that we need
and
Figure 29-53 on page
≈
Table 29-3 on page
Figure 29-52 on page
0.084 mA
108.3 uA
238.2 uA
256.3 uA
227.0 uA
62.3 uA
260.4 uA
230.8 uA
V
CC
= 5V, F = 8MHz
351.
Table 29-4
CC
= 2.0V
351
for