ATMEGA168 Microcontrollers: Features, Pinout, and Datasheet

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• High Performance, Low Power AVR® 8-Bit Microcontroller Family

• Advanced RISC Architecture

̶ 131 Powerful Instructions – Most Single Clock Cycle Execution

̶ 32 x 8 General Purpose Working Registers

̶ Fully Static Operation

̶ Up to 20 MIPS Throughput at 20MHz

̶ On-chip 2-cycle Multiplier

• High Endurance Non-volatile Memory Segments

̶ 4/8/16/32KBytes of In-System Self-Programmable Flash program memory

̶ 256/512/512/1KBytes EEPROM

̶ 512/1K/1K/2KBytes Internal SRAM

̶ Write/Erase Cycles: 10,000 Flash/100,000 EEPROM

̶ Data retention: 20 years at 85°C/100 years at 25°C(1)

̶ Optional Boot Code Section with Independent Lock Bits

  In-System Programming by On-chip Boot Program

  True Read-While-Write Operation

̶ Programming Lock for Software Security

• QTouch® library support

̶ Capacitive touch buttons, sliders and wheels

̶ QTouch and QMatrix™ acquisition

̶ Up to 64 sense channels

• Peripheral Features

̶ Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode

̶ One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode

̶ Real Time Counter with Separate Oscillator

̶ Six PWM Channels

̶ 8-channel 10-bit ADC in TQFP and QFN/MLF package

  Temperature Measurement

̶ 6-channel 10-bit ADC in PDIP Package

  Temperature Measurement

̶ Programmable Serial USART

̶ Master/Slave SPI Serial Interface

̶ Byte-oriented 2-wire Serial Interface (Philips I2C compatible)

̶ Programmable Watchdog Timer with Separate On-chip Oscillator

̶ On-chip Analog Comparator

̶ Interrupt and Wake-up on Pin Change

• Special Microcontroller Features

̶ Power-on Reset and Programmable Brown-out Detection

̶ Internal Calibrated Oscillator

̶ External and Internal Interrupt Sources

̶ Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby

• I/O and Packages

̶ 23 Programmable I/O Lines

̶ 28-pin PDIP, 32-lead TQFP, 28-pad QFN/MLF and 32-pad QFN/MLF

• Operating Voltage:

̶ 1.8 - 5.5V

• Temperature Range:

̶ -40°C to 85°C

• Speed Grade:

̶ 0 - 4MHz@1.8 - 5.5V, 0 - 10MHz@2.7 - 5.5.V, 0 - 20MHz @ 4.5 - 5.5V

• Power Consumption at 1MHz, 1.8V, 25°C

̶ Active Mode: 0.2mA

̶ Power-down Mode: 0.1µA

  Power-save Mode: 0.75µA (Including 32kHz RTC)

Functional Block Diagram

The AVR core has 32 general-purpose working registers and a large instruction set. The Arithmetic Logic Unit (ALU) is directly coupled to all 32 registers, allowing two independent registers to be accessed in a single instruction executed in one clock cycle. The resulting architecture is more code efficient than traditional CISC microcontrollers, with throughputs up to ten times faster.

The ATMEGA168 has the following capabilities: 4K/8Kbytes of Read-While-Write In-System Programmable Flash, 256/512/512/1Kbytes EEPROM, 512/1K/1K/2Kbytes SRAM, 23 general-purpose I/O lines, 32 general purpose working registers, three flexible Timer/Counters with compare modes, internal and external interrupts, a serial programmable USART, a byte-oriented 2-wire Serial Interface, an SPI serial port, a 6-channel 10-bit ADC The CPU is turned off in Idle mode, while the SRAM, Timer/Counters, USART, 2-wire Serial Interface, SPI interface, and interrupt system remain operational. The Oscillator is frozen in the Power-down mode, which disables all other chip functions until the next interrupt or hardware reset. The asynchronous timer continues to run in Power-save mode, allowing the user to keep a timer base while the rest of the device sleeps. To reduce switching noise during ADC conversions, the ADC Noise Reduction mode turns off the CPU and all I/O modules except the asynchronous timer and ADC. The crystal/resonator Oscillator runs in Standby mode while the rest of the device sleeps. This enables for a very quick start-up while also consuming extremely little power.

While the Application Flash part is being updated, the software in the Boot Flash area will continue to operate, allowing for genuine Read-While-Write operation. The ATMEGA168 is a sophisticated microcontroller that combines an 8-bit RISC CPU with In-System Self-Programmable Flash on a monolithic device to provide a highly versatile and cost effective solution to many embedded control applications.

C Compilers, Macro Assemblers, Program Debuggers/Simulators, In-Circuit Emulators, and Evaluation Kits are all available for the ATMEGA168 AVR.

• Students Projects

• Embedded and Robotics System

• Industrial Automation

• Home Security System

• For the Designing of Quadcopters

Package

Microchip Technology Inc., a leader in microcontroller and analog semiconductors, is a market leader. The headquarters of Microchip were in Chandler, Arizona. We strive to provide low-risk product development while lowering total system costs and shortening time to market. We primarily service consumers in a variety of fields all across the world. Our mission is to provide outstanding technical support as well as consistent delivery and quality.