The high-performance, low-power Atmel 8-bit AVR RISC-based microcontroller combines 1KB ISP flash memory, 32B SRAM, 4 general purpose I/O lines, 16 general purpose working registers, a 16-bit timer/counter with two PWM channels, internal and external interrupts, programmable watchdog timer with internal oscillator, an internal calibrated oscillator, and 4 software selectable power saving modes. The device operates between 1.8-5.5 volts. 
By executing powerful instructions in a single clock cycle, the device achieves throughputs approaching 1 MIPS per MHz, balancing power consumption and processing speed.