The Atmel ATtiny85-PU in DIP format. The powerful, low-power Microchip 8-bit AVR RISC-based microcontroller combines 8KB ISP flash memory, 512B EEPROM, 512-Byte SRAM, 6 common I / O lines, 32 common working registers, one 8-bit timer / counter with comparison modes , one 8-bit high-speed timer / counter, USI, internal and external interrupts, 4-channel 10-bit A / D converter, programmable watchdog timer with internal oscillator, three software-selectable power-saving modes, and debugWIRE for on- chip debugging. The device achieves 20 MIPS throughput at 20 MHz and operates between 2.7 - 5.5 volts.pay attention: There is no boot loader on the Attiny!