ATmega168 Atmel Corporation, ATmega168 Datasheet - Page 369
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ATmega168
Manufacturer Part Number
ATmega168
Description
Manufacturer
Atmel Corporation
Specifications of ATmega168
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
No
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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Table of contents
2545T–AVR–05/11
1
2
3
4
5
6
7
8
9
Features ..................................................................................................... 1
Pin configurations ................................................................................... 2
Overview ................................................................................................... 5
Resources ................................................................................................. 8
Data retention ........................................................................................... 8
About code examples .............................................................................. 8
Capacitive touch sensing ........................................................................ 8
AVR CPU core .......................................................................................... 9
AVR memories ....................................................................................... 17
System clock and clock options .......................................................... 27
1.1Pin descriptions .........................................................................................................3
2.1Block diagram ............................................................................................................5
2.2Comparison between Atmel ATmega48, Atmel ATmega88, and Atmel ATmega168 .
7.1Overview ...................................................................................................................9
7.2Architectural overview ...............................................................................................9
7.3ALU – Arithmetic Logic Unit ....................................................................................10
7.4Status register .........................................................................................................11
7.5General purpose register file ...................................................................................12
7.6Stack pointer ...........................................................................................................13
7.7Instruction execution timing .....................................................................................14
7.8Reset and interrupt handling ...................................................................................15
8.1Overview .................................................................................................................17
8.2In-system reprogrammable flash program memory .................................................17
8.3SRAM data memory ................................................................................................19
8.4EEPROM data memory ...........................................................................................20
8.5I/O memory ..............................................................................................................21
8.6Register description .................................................................................................22
9.1Clock systems and their distribution ........................................................................27
9.2Clock sources ..........................................................................................................28
9.3Low power crystal oscillator ....................................................................................29
9.4Full swing crystal oscillator ......................................................................................31
6
ATmega48/88/168
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