ATmega1284P Atmel Corporation, ATmega1284P Datasheet - Page 402

• Manufacturer Part Number: ATmega1284P
• Manufacturer: Atmel Corporation

Specifications of ATmega1284P

• Flash (kbytes): 128 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): 16
• Eeprom (bytes): 4096
• 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

29.3.3
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 29-5.
Table 29-6.
It is possible to calculate the typical current consumption based on the numbers from
on page 428
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
to add 6.0% for the TIMER1, 14.8% for the ADC, and 10.3% for the SPI module. Reading from
Figure 29-153 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.
for other V
ATmega164A/PA/324A/PA/644A/PA/1284/P
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
423
423)
V
CC
I
and
CC
425, we find that the idle current consumption is ~0.078mA at V
= 2V, F = 1MHz
CC
total
11.8µA
3.1µA
3.0µA
6.4µA
5.6µA
3.6µA
1.7µA
5.3µA
Figure 29-149 on page
and frequency settings than listed in
≈
Figure 29-148 on page
0.078mA (1+ 0.060 + 0.148 + 0.103)
1.4%
1.4%
3.0%
2.5%
1.6%
0.7%
4.2%
2.7%
Table 29-8 on page
⋅
V
CC
= 3V, F = 4MHz
21.5µA
21.0µA
45.7µA
37.7µA
24.8µA
10.4µA
59.2µA
40.1µA
Additional Current consumption
compared to Idle with external
clock (see
425
426)
”PRR0 – Power Reduction Register 0” on
428, third column, we see that we need
and
Figure 29-154 on page
Table 29-7 on page
≈
Figure 29-153 on page
0.102mA
V
11.3%
14.8%
10.3%
5.3%
5.2%
9.1%
6.0%
2.5%
CC
= 5V, F = 8MHz
100.0µA
214.5µA
165.8µA
107.0µA
257.0µA
206.8µA
98.2µA
43.2µA
428.
Table 29-8
CC
= 2.0V
402