High performance, low power Microchip 8 bit AVR® RISC based microcontroller Integrates 8 KB ISP Flash memory, 512B EEPROM, 512B SRAM, six general-purpose I/O lines, 32 general-purpose work registers, one 8-bit timer/counter with compare mode, 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 an efficiency of 20 MIPS at 20 MHz and operates between 2.7-5.5 volts.