ATmega1284P Atmel Corporation, ATmega1284P Datasheet - Page 350

• 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

29.1.3
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 29-1.
Table 29-2.
It is possible to calculate the typical current consumption based on the numbers from
on page 376
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
to add 8.8% for the TIMER1, 20.9% for the ADC, and 13.8% for the SPI module. Reading from
Figure 29-55 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
Additional Current consumption
compared to Active with external
clock (see
371
371)
V
CC
I
373, we find that the idle current consumption is ~0.073mA at V
and
CC
= 2V, F = 1MHz
CC
total
11.7µA
3.1µA
2.9µA
6.1µA
5.9µA
3.7µA
1.4µA
5.1µA
Figure 29-51 on page
and frequency settings than listed in
≈
Figure 29-50 on page
0.073 mA (1+ 0.088 + 0.209 + 0.138)
1.5
1.5
3.2
2.9
1.8
0.7
4.4
2.9
%
%
%
%
%
%
%
%
Table 29-4 on page
⋅
V
CC
= 3V, F = 4MHz
20.9µA
21.6µA
40.1µA
26.1µA
55.5µA
37.9µA
9.4µA
44µA
Additional Current consumption
compared to Idle with external
clock (see
373
374)
”PRR0 – Power Reduction Register 0” on
376, third column, we see that we need
and
Figure 29-56 on page
Table 29-3 on page
Figure 29-55 on page
≈
0.10 mA
V
15.4
14.0
20.9
13.8
7.4
7.5
8.8
3.1
CC
%
%
%
%
= 5V, F = 8MHz
%
%
%
%
205.8µA
113.2µA
249.5µA
195.5µA
96.7µA
38.8µA
101µA
182µA
376.
Table 29-4
CC
= 2.0V
350