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The high-performance, low-power Microchip 8-bit AVR RISC-based microcontroller
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64 KB ISP flash memory with read-while-write capabilities,
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53 general purpose I/O lines,
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32 general purpose working registers,
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JTAG interface for boundary-scan and on-chip debugging/programming,
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2 x 8-bit, 2 x 16-bit timer/counters with compare modes,
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internal and external interrupts,
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serial programmable USART,
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universal serial interface (USI) with start condition detector,
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8-channel 10-bit A/D converter,
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programmable watchdog timer with internal oscillator,
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five software selectable power saving modes.