8-bit avr®
microcontroller
with 128k bytes
in-system
programmable
flash

features
• high-performance, low-power avr® 8-bit microcontroller
• advanced risc architecture
– 133 powerful instructions – most single clock cycle execution
– 32 x 8 general purpose working registers + peripheral control registers
– fully static operation
– up to 16 mips throughput at 16 mhz
– on-chip 2-cycle multiplier
• high endurance non-volatile memory segments
– 128k bytes of in-system self-programmable flash program memory
– 4k bytes eeprom
– 4k bytes 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
– up to 64k bytes optional external memory space
– programming lock for software security
– spi interface for in-system programming
• jtag (ieee std. 1149.1 compliant) interface
– boundary-scan capabilities according to the jtag standard
– extensive on-chip debug support
– programming of flash, eeprom, fuses and lock bits through the jtag interface
• peripheral features
– two 8-bit timer/counters with separate prescalers and compare modes
– two expanded 16-bit timer/counters with separate prescaler, compare mode and
capture mode
– real time counter with separate oscillator
– two 8-bit pwm channels
– 6 pwm channels with programmable resolution from 2 to 16 bits
– output compare modulator
– 8-channel, 10-bit adc
8 single-ended channels
7 differential channels
2 differential channels with programmable gain at 1x, 10x, or 200x
– byte-oriented two-wire serial interface
– dual programmable serial usarts
– master/slave spi serial interface
– programmable watchdog timer with on-chip oscillator
– on-chip analog comparator
• special microcontroller features
– power-on reset and programmable brown-out detection
– internal calibrated rc oscillator
– external and internal interrupt sources
– six sleep modes: idle, adc noise reduction, power-save, power-down, standby,
and extended standby
– software selectable clock frequency
– atmega103 compatibility mode selected by a fuse
– global pull-up disable
• i/o and packages
– 53 programmable i/o lines
– 64-lead tqfp and 64-pad qfn/mlf
• operating voltages
– 2.7 - 5.5v
• speed grades
– 0 - 16 mhz