Serial interfaces and peripheral set
On the connectivity side, this MCU brings I²C, IrDA, SPI, and UART/USART — all available simultaneously through the shared pin mux. That means a design can run a sensor over I²C, talk to a radio over SPI, and keep a debug UART active without swapping peripherals. The internal oscillator cuts the external BOM to a single decoupling cap if the accuracy budget allows.
