ATmega48PA Atmel Corporation, ATmega48PA Datasheet - Page 413

• 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

30.4.3
30.4.3.1
8271D–AVR–05/11
ATmega88PA: 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 30-7.
Table 30-8.
It is possible to calculate the typical current consumption based on the numbers from
for other V
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
for the TIMER1, 26.3% for the ADC, and 21.5% for the SPI module. Reading from
on page
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
≈
410, we find that the idle current consumption is ~0.027 mA at V
0.027 mA (1 + 0.136 + 0.263 + 0.215)
CC
and frequency settings than listed in
ATmega88PA: Additional Current Consumption for the different I/O modules
(absolute values)
ATmega88PA: Additional Current Consumption (percentage) in Active and Idle
mode
⋅
Typical numbers
3.0uA
6.1uA
5.2uA
3.8uA
Additional Current consumption
compared to Active with external
clock (see
407
408)
1.8%
3.9%
2.9%
2.1%
0.8%
3.5%
4.2%
1.5uA
5.2uA
6.3uA
V
ATmega48A/PA/88A/PA/168A/PA/328/P
CC
and
= 2V, F = 1MHz
Figure 30-143 on page
Figure 30-142 on page
Table
30-8, third column, we see that we need to add 13.6%
21.3uA
45.4uA
35.2uA
25.6uA
9.8uA
40.0uA
48.7uA
≈
V
0.043 mA
CC
= 3V, F = 4MHz
Table
”Power Reduction Register” on page 43
Additional Current consumption
compared to Idle with external
clock (see
410
410)
11.4%
24.4%
18.6%
13.6%
5.2%
21.5%
26.3%
30-7.
and
Figure 30-148 on page
Figure 30-147 on page
97.9uA
219.0uA
149.5uA
110.0uA
39.6uA
199.6uA
247.0uA
V
CC
= 5V, F = 8MHz
CC
= 2.0V and F =
Figure 30-147
Table 30-8
413
for