单片机 atmega8a-au avr原装正品

atmega8a

8-bit with 8k bytes
in-system
programmable
flash
  

features
• high-performance, low-power avr® 8-bit microcontroller
• advanced risc architecture
– 130 powerful instructions – most single-clock cycle execution
– 32 x 8 general purpose working registers
– fully static operation
– up to 16 mips throughput at 16 mhz
– on-chip 2-cycle multiplier
• high endurance non-volatile memory segments
– 8k bytes of in-system self-programmable flash program memory
– 512 bytes eeprom
– 1k byte 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
• peripheral features
– two 8-bit timer/counters with separate prescaler, one compare mode
– one 16-bit timer/counter with separate prescaler, compare mode, and capture
mode
– real time counter with separate oscillator
– three pwm channels
– 8-channel adc in tqfp and qfn/mlf package
• eight channels 10-bit accuracy
– 6-channel adc in pdip package
• six channels 10-bit accuracy
– byte-oriented two-wire serial interface
– programmable serial usart
– master/slave spi serial interface
– programmable watchdog timer with separate 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
– five sleep modes: idle, adc noise reduction, power-save, power-down, and
standby
• i/o and packages
– 23 programmable i/o lines
– 28-lead pdip, 32-lead tqfp, and 32-pad qfn/mlf
• operating voltages
– 2.7 - 5.5v for atmega8a
• speed grades
– 0 - 16 mhz for atmega8a
• power consumption at 4 mhz, 3v, 25°c
– active: 3.6 ma
– idle mode: 1.0 ma
– power-down mode: 0.5 μa

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