ATmega168A Atmel Corporation, ATmega168A Datasheet - Page 463

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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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30.6.3
30.6.3.1
8271D–AVR–05/11
ATmega168PA 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 30-11. ATmega168PA: Additional Current Consumption for the different I/O modules
Table 30-12. ATmega168PA: Additional Current Consumption (percentage) in Active and Idle
It is possible to calculate the typical current consumption based on the numbers from
12 on page 463
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
to add 10.3% for the TIMER1, 20.3% for the ADC, and 17.1% for the SPI module. Reading from
Figure 30-241 on page
2.0V 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
0.027 mA (1 + 0.103 + 0.203 + 0.171)
(absolute values)
mode
for other V
Typical numbers
2.86uA
6.00uA
4.97uA
3.50uA
Additional Current consumption
compared to Active with external
clock (see
457
458)
1.5%
3.2%
2.4%
1.7%
0.7%
2.9%
3.4%
1.43uA
5.01uA
6.34uA
V
ATmega48A/PA/88A/PA/168A/PA/328/P
CC
and
= 2V, F = 1MHz
460, we find that the idle current consumption is ~0.027 mA at V
Figure 30-237 on page
CC
Figure 30-236 on page
and frequency settings than listed in
Table 30-12 on page
20.3uA
44.1uA
33.2uA
23.0uA
9.2uA
38.6uA
45.7uA
V
0.040 mA
CC
= 3V, F = 4MHz
”Power Reduction Register” on page 43
Additional Current consumption
compared to Idle with external
clock (see
460
460)
8.9%
19.5%
14.8%
10.3%
4.1%
17.1%
20.3%
463, third column, we see that we need
and
Figure 30-242 on page
Figure 30-241 on page
52.2uA
122.0uA
79.8uA
55.3uA
21.4uA
111.4uA
123.6uA
Table 30-11 on page
V
CC
= 5V, F = 8MHz
Table 30-
463.
CC
463
for
=

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