The high-performance, low-power Microchip 8-bit AVR® RISC-based CMOS 8-bit microcontroller combines 512B ISP Flash memory, 32B SRAM, four 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, a 4-channel/8-bit A/D converter, and four 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 one MIPS per MHz, balancing power consumption and processing speed.