Overview

The Atmel ATmega48/88/168 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega48/88/168 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

Features

• High performance, low power Atmel® AVR® 8-bit microcontroller

• Advanced RISC architecture

– 131 powerful instructions – most single clock cycle execution

– 32 × 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 Kbytes of in-system self-programmable flash program memory

– 256/512/512 bytes EEPROM

– 512/1K/1Kbytes internal SRAM

– Write/erase cyles: 10,000 flash/100,000 EEPROM

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

– 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

– 6-channel 10-bit ADC in PDIP Package

– 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

– DebugWIRE on-chip debug system

– Power-on reset and programmable brown-out detection

– Internal calibrated oscillator

– External and internal interrupt sources

– Five sleep modes: Idle, ADC noise reduction, power-save, power-down, and 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:

– 1.8V - 5.5V for Atmel ATmega48V/88V/168V

– 2.7V - 5.5V for Atmel ATmega48/88/168

• Temperature range:

– -40°C to 85°C

• Speed grade:

– ATmega48V/88V/168V: 0 - 4MHz @ 1.8V - 5.5V, 0 - 10MHz @ 2.7V - 5.5V

– ATmega48/88/168: 0 - 10MHz @ 2.7V - 5.5V, 0 - 20MHz @ 4.5V - 5.5V

• Low power consumption

– Active mode:

250µA at 1MHz, 1.8V

15µA at 32kHz, 1.8V (including oscillator)

– Power-down mode:

0.1µA at 1.8V