The Atmel ATTINY45-20PU is a high performance and low power AVR 8-bit microcontroller with 4K bytes of in-system programmable flash, alongside 256 bytes of EEPROM and 256 bytes of SRAM. The device is manufactured using Atmel’s high density non-volatile memory technology. The on-chip ISP flash allows the program memory to be re-programmed in-system through an SPI serial interface, by a conventional non-volatile memory programmer or by an on-chip boot code running on the AVR core.
• Universal serial interface with start condition detector
• Comes with debugWIRE on-chip debug system
• In-system programmable via SPI port
• Low power idle, ADC noise reduction and power-down modes
• Six programmable input and output lines
• External and internal interrupt sources
• Programmable brown-out detection circuit
• Internal calibrated oscillator
• On-chip analogue comparator
• 8-bit high speed timer/counter with separate prescaler and two PWM channels
Технические параметры
| Серия | avr attiny |
| Ядро | avr |
| Ширина шины данных | 8-бит |
| Тактовая частота | 20 мгц |
| Количество входов/выходов | 6 |
| Объем памяти программ | 4 кбайт(2k x 16) |
| Тип памяти программ | flash |
| Объем EEPROM | 256×8 |
| Объем RAM | 256×8 |
| Наличие АЦП/ЦАП | ацп 4x10b |
| Встроенные интерфейсы | usi |
| Встроенная периферия | brown-outdetect/reset, por, pwm, wdt |
| Напряжение питания | 2.7…5.5 в |
| Рабочая температура | -40…+85c |
| Корпус | dip-8(0.300, 7.62мм) |
| Вес, г | 1 |



