ATmega168A Atmel Corporation, ATmega168A Datasheet - Page 338

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ATmega168A

Manufacturer Part Number
ATmega168A
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATmega168A

Flash (kbytes)
16 Kbytes
Pin Count
32
Max. Operating Frequency
20 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
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)
1
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
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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