描述 Description

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.

特性 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