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32 bit ARM Cortex-M4 72 MHz CPU (M4 = DSP extensions)
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256K flash memory, 64K RAM, 2K EEPROM
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21 x high-resolution analogue inputs (13 bits usable, 16-bit hardware)
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34 x digital I/O pins (21 shared with analogue)
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12 PWM outputs
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1 x 12-bit DAC output
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8 timers for intervals/delays, separate from PWM
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USB with dedicated DMA memory transfers
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CAN bus
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3 UARTs (serial ports)
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SPI, I2C, I2S, IR modulator
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I2S (for high-quality audio interface)
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Real-time clock (with user-added 32.768 crystal and battery)
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16 general purpose DMA channels (separate from USB)
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Touch sensor inputs
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Dimensions: 35.6 mm x 17.8 mm