ATmega48PA Atmel Corporation, ATmega48PA Datasheet - Page 363

• Manufacturer Part Number: ATmega48PA
• Manufacturer: Atmel Corporation

Specifications of ATmega48PA

• Flash (kbytes): 4 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 23
• Ext Interrupts: 24
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• 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: Yes
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 256
• Self Program Memory: NO
• 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

30.2.3
30.2.3.1
8271D–AVR–05/11
ATmega48PA: Supply Current of IO Modules
Example
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
details.
Table 30-3.
Table 30-4.
It is possible to calculate the typical current consumption based on the numbers from
on page 363
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
to add 11.2% for the TIMER1, 22.1% for the ADC, and 17.6% for the SPI module. Reading from
Figure 30-53 on page 360
and F = 1MHz. The total current consumption in idle mode with TIMER1, ADC, and SPI enabled,
gives:
PRR bit
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRSPI
PRADC
PRR bit
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRSPI
PRADC
I
CC
CC
total
= 2.0V and F = 1MHz. From
≈
0.028 mA (1 + 0.112 + 0.221 + 0.176)
for other V
ATmega48PA: Additional Current Consumption for the different I/O modules
(absolute values)
ATmega48PA: Additional Current Consumption (percentage) in Active and Idle
mode
⋅
Typical numbers
2.9uA
6.0uA
5.0uA
3.6uA
Additional Current consumption
compared to Active with external
clock (see
358
358)
1.8%
3.9%
2.9%
2.1%
0.8%
3.3%
4.2%
1.4uA
5.0uA
6.1uA
V
ATmega48A/PA/88A/PA/168A/PA/328/P
CC
and
= 2V, F = 1MHz
CC
, we find that the idle current consumption is ~0.028 mA at V
Figure 30-49 on page
and frequency settings than listed in
Figure 30-48 on page
Table 30-4 on page
20.7uA
44.8uA
34.5uA
24.4uA
9.5uA
38.0uA
47.4uA
≈
V
0.042 mA
CC
= 3V, F = 4MHz
”Power Reduction Register” on page 43
Additional Current consumption
compared to Idle with external
clock (see
360
361)
11.4%
20.6%
15.7%
11.2%
4.2%
17.6%
22.1%
363, third column, we see that we need
and
Figure 30-54 on page
Table 30-3 on page
Figure 30-53 on page
97.4uA
219.7uA
141.3uA
107.7uA
38.4uA
190.4uA
244.7uA
V
CC
= 5V, F = 8MHz
363.
Table 30-4
CC
= 2.0V
363
for