ATmega324PA Atmel Corporation, ATmega324PA Datasheet - Page 480

• Manufacturer Part Number: ATmega324PA
• Manufacturer: Atmel Corporation

Specifications of ATmega324PA

• Flash (kbytes): 32 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 32
• Ext Interrupts: 32
• Usb Speed: No
• Usb Interface: No
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

29.6.3
Example
8272C–AVR–06/11
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 48
Table 29-11. Additional Current Consumption for the different I/O modules (absolute values)
Table 29-12. Additional Current Consumption (percentage) in Active and Idle mode
It is possible to calculate the typical current consumption based on the numbers from
12 on page 480
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
to add 9.1% for the TIMER1, 17.9% for the ADC, and 12.4% for the SPI module. Reading from
Figure 29-251 on page
and F = 1MHz. The total current consumption in idle mode with TIMER1, ADC, and SPI enabled,
gives:
PRR bit
PRUSART1
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRADC
PRSPI
PRR bit
PRUSART1
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRADC
PRSPI
CC
= 2.0V and F = 1MHz. From
for details.
ATmega164A/PA/324A/PA/644A/PA/1284/P
for other V
Typical numbers in
Additional Current consumption
compared to Active with external
clock (see
475
475)
V
CC
I
and
CC
477, we find that the idle current consumption is ~0.078mA at V
= 2V, F = 1MHz
total
16.2µA
5.9µA
6.7µA
9.5µA
6.6µA
3.1µA
9.3µA
12µA
Figure 29-247 on page
CC
≈
Figure 29-246 on page
0.070mA (1+ 0.091 + 0.179 + 0.124)
and frequency settings than listed in
3.65%
1.6%
1.8%
2.6%
3.3%
1.9%
0.9%
2.5%
Table 29-12 on page
⋅
V
CC
= 3V, F = 4MHz
37.3µA
58.9µA
74.3µA
41.4µA
19.5µA
75.4µA
56.6µA
40µA
Additional Current consumption
compared to Idle with external
clock (see
477
478)
”PRR0 – Power Reduction Register 0” on
480, third column, we see that we need
and
Figure 29-252 on page
≈
Figure 29-251 on page
0.091mA
Table 29-11 on page
V
12.9%
16.3%
17.9%
12.4%
8.1%
8.8%
9.1%
4.3%
CC
= 5V, F = 8MHz
157.1µA
239.5µA
297.6µA
170.3µA
301.4µA
226.3µA
78.6µA
149µA
Table 29-
CC
480.
= 2.0V
480