On-chip ADC and serial interfaces
An 8-channel 10-bit ADC is integrated, which can sample analog sensors without an external converter — useful for temperature, pressure, or light-level readouts in industrial or consumer gear. Connectivity includes I²C, SPI, and the Universal Serial Interface (USI), so the part can talk to common peripherals like EEPROMs, digital potentiometers, or small displays.
Peripheral set and internal oscillator
For designs that need precise timing, an external clock can still be fed in.