ATMEGA328-AUR Atmel, ATMEGA328-AUR Datasheet - Page 487

• Manufacturer Part Number: ATMEGA328-AUR
• Description: IC MCU AVR 32K FLASH 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA328-AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

29.7.3.1
8271C–AVR–08/10
Example
Table 29-14. ATmega328: Additional Current Consumption (percentage) in Active and Idle
It is possible to calculate the typical current consumption based on the numbers from
13
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
14.5% for the TIMER1, 22.1% for the ADC, and 15.7% for the SPI module. Reading from
29-336 on page
= 1MHz. The total current consumption in idle mode with TIMER1, ADC, and SPI enabled, gives:
I
ATmega48A/48PA/88A/88PA/168A/168PA/328/328
CC
PRR bit
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRSPI
PRADC
for other V
total
CC
≈
= 2.0V and F = 1MHz. From
0.045 mA (1 + 0.145 + 0.221 + 0.157)
CC
mode
509, we find that the idle current consumption is ~0.055 mA at V
⋅
and frequency settings than listed in
Additional Current consumption
compared to Active with external
clock (see
506
507)
and
Figure 29-331 on page
Figure 29-330 on page
1.4%
3.0%
3.3%
2.7%
0.9%
2.9%
4.1%
Table
≈
0.069 mA
29-14, third column, we see that we need to add
Table
Additional Current consumption
compared to Idle with external
clock (see
509
509)
and
29-14.
Figure 29-336 on page
Figure 29-335 on page
16.6%
17.8%
14.5%
15.7%
22.1%
7.8%
4.8%
CC
= 2.0V and F
Table 29-
Figure
487