ATmega48PA Atmel Corporation, ATmega48PA Datasheet - Page 338
ATmega48PA
Manufacturer Part Number
ATmega48PA
Description
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
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30.1.3
30.1.3.1
8271D–AVR–05/11
ATmega48A: 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 30-1.
Table 30-2.
It is possible to calculate the typical current consumption based on the numbers from
on page 338
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 30-1 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
338.
Table 30-2
CC
= 2.0V
338
for
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