ATMEGA328P-20PU Atmel, ATMEGA328P-20PU Datasheet - Page 327
ATMEGA328P-20PU
Manufacturer Part Number
ATMEGA328P-20PU
Description
Manufacturer
Atmel
Datasheet
1.ATMEGA328P-20PU.pdf
(419 pages)
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
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29.1.3
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 29-1.
Table 29-2.
It is possible to calculate the typical current consumption based on the numbers from
on page 327
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
to add 16.1% for the TIMER1, 15.5% for the ADC, and 13.4% for the SPI module. Reading from
Figure 29-6 on page 324
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
5.58 uA
8.97 uA
9.84 uA
9.80 uA
Additional Current consumption
compared to Active with external
clock (see
322
1.9%
3.1%
3.5%
3.4%
0.8%
2.8%
3.3%
2.31 uA
9.35 uA
7.88 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 29-2 on page
and frequency settings than listed in
≈
Figure 29-1 on page
0.055 mA (1 + 0.161 + 0.155 + 0.134)
Table 29-2 on page
⋅
35.6 uA
57.0 uA
64.7 uA
62.8 uA
15.3 uA
51.9 uA
60.5 uA
V
CC
322)
= 3V, F = 4MHz
”Power Reduction Register” on page 42
ATmega48P/88P/168P
Additional Current consumption
compared to Idle with external
clock (see
324
9.1%
14.8%
16.6%
16.1%
3.9%
13.4%
15.5%
327, third column, we see that we need
and
Figure 29-7 on page
≈
Table 29-1 on page
Figure 29-6 on page
0.080 mA
136.5 uA
231.5 uA
263.5 uA
247.9 uA
60.9 uA
215.7 uA
237.7 uA
V
CC
= 5V, F = 8MHz
325)
327.
Table 29-2
CC
= 2.0V
327
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