The CC2340R device provides 1xUART, 1xSPI, and 1xI2C serial peripherals.

The SPI module supports both SPI controller and peripheral up to 12MHz with configurable phase and polarity.

The UART module implements universal asynchronous receiver and transmitter functions. They support flexible baud-rate generation up to a maximum of 3Mbps and IRDA SIR mode of operation.

The I²C module is used to communicate with devices compatible with the I²C standard. The I²C interface can handle 100kHz and 400kHz operation and can serve as both controller and target.

The I/O controller (IOC) controls the digital I/O pins and contains multiplexer circuitry to allow a set of peripherals to be assigned to I/O pins in a fixed manner over DIOs. All digital I/Os are interrupt and wake-up capable, have a programmable pullup and pulldown function, and can generate an interrupt on a negative or positive edge (configurable). When configured as an output, pins can function as either push-pull, open-drain, or open-source. Some GPIOs have high-drive capabilities, which are marked in bold in Pin Configurations and Functions.

For more information, see the CC23xx SimpleLink™ Wireless MCU Technical Reference Manual.