●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
