Special input/output (Special I/O or SIO) are inputs and/or outputs of a microcontroller designated to perform specialized functions or have specialized features. Specialized functions can include: Hardware interrupts, analog input or output PWM output Serial communication, such as UART, USART, SPI bus, or SerDes.
Special input/output (Special I/O or SIO) are inputs and/or outputs of a microcontroller designated to perform specialized functions or have specialized features. Specialized functions can include: Hardware interrupts, analog input or output PWM output Serial communication, such as UART, USART, SPI bus, or SerDes.
Source: Wikipedia "Special input/output" · CC BY-SA 4.0
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