ATmega48P Atmel Corporation, ATmega48P Datasheet - Page 352

• Manufacturer Part Number: ATmega48P
• Manufacturer: Atmel Corporation

Specifications of ATmega48P

• 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

Example
30.2.4
352
ATmega48P/88P/168P
Power-down Supply Current
Table 30-4.
It is possible to calculate the typical current consumption based on the numbers from
on page 351
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
to add 17.0% for the TIMER1, 17.6% for the ADC, and 17.5% for the SPI module. Reading from
Figure 30-52 on page 349
and F = 1MHz. The total current consumption in idle mode with TIMER1, ADC, and SPI enabled,
gives:
Figure 30-57. Power-Down Supply Current vs. V
PRR bit
PRTIM1
PRTIM0
PRSPI
PRADC
CC
= 2.0V and F = 1MHz. From
1.8
1.6
1.4
1.2
0.8
0.6
0.4
0.2
2
1
0
for other V
1.5
Additional Current Consumption (percentage) in Active and Idle mode
Additional Current consumption
compared to Active with external
clock (see
346
347)
2.8%
0.8%
3.0%
2.9%
and
I
2
CC
CC
, we find that the idle current consumption is ~0.055 mA at V
total
Figure 30-48 on page
and frequency settings than listed in
≈
Figure 30-47 on page
0.055 mA (1 + 0.170 + 0.176 + 0.175)
2.5
Table 30-4 on page
⋅
3
V
CC
3.5
(V)
CC
(Watchdog Timer Disabled).
Additional Current consumption
compared to Idle with external
clock (see
349
349)
17.0%
4.6%
17.5%
17.6%
4
351, third column, we see that we need
and
Figure 30-53 on page
≈
4.5
Table 30-3 on page
Figure 30-52 on page
0.084 mA
5
5.5
-40 °C
85 °C
25 °C
8025M–AVR–6/11
351.
Table 30-4
CC
= 2.0V