ATMEGA324PA-CUR Atmel, ATMEGA324PA-CUR Datasheet - Page 422

• Manufacturer Part Number: ATMEGA324PA-CUR
• Description: MCU AVR 32KB FLSH 20 MHZ 49VFBGA
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA324PA-CUR

• 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: 32
• 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: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

28.4.3
Example
8152G–AVR–11/09
Supply Current of I/O 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
page 49
Table 28-7.
Table 28-8.
It is possible to calculate the typical current consumption based on the numbers from
on page 397
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
to add 8.0% for the TIMER1, 19.8% for the ADC, and 13.2% for the SPI module. Reading from
Figure 28-148 on page 420
and F = 1MHz. The total current consumption in idle mode with TIMER1, ADC, and SPI enabled,
gives:
PRR bit
PRUSART1
PRUSART0
PRTWI
PRTIM3
PRTIM2
PRTIM1
PRTIM0
PRADC
PRSPI
PRR bit
PRUSART1
PRUSART0
PRTWI
PRTIM3
PRTIM2
PRTIM1
PRTIM0
PRTADC
PRSPI
CC
= 2.0V and F = 1MHz. From
for details.
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 in
Additional Current consumption
compared to Active with external
clock (see
and
V
CC
CC
Figure 28-143 on page
, we find that the idle current consumption is ~0.075 mA at V
= 2V, F = 1 MHz
and frequency settings than listed in
ATmega164PA/324PA/644PA/1284P
13.5 µA
3.0 µA
2.9 µA
7.5 µA
4.0 µA
6.0 µA
4.2 µA
1.7 µA
5.7 µA
Figure 28-142 on page 417
0.9%
0.9%
2.3%
1.1%
1.8%
1.2%
0.5%
3.0%
2.0%
Table 28-6 on page
417)
V
CC
= 3V, F = 4 MHz
19.2 µA
19.2 µA
49.3 µA
24.7 µA
39.7 µA
26.4 µA
11.6 µA
54.7 µA
40.6 µA
”PRR – Power Reduction Register” on
397, third column, we see that we need
Additional Current consumption
compared to Idle with external clock
(see
Figure 28-148 on page
Figure 28-147 on page 419
Table 28-5 on page
V
15.4%
12.1%
19.8%
13.2%
6.0%
6.0%
7.5%
8.0%
3.6%
CC
= 5V, F = 8 MHz
230.3 µA
105.5 µA
176.3 µA
113.7 µA
212.2 µA
87.7 µA
88.5 µA
54.3 µA
273 µA
420)
397.
Table 28-6
CC
= 2.0V
and
422