nRF93M1 provides three asynchronous UART peripherals, each with dedicated functionality:
- UART1 — primary AT command and data port.
- UART0 — modem trace output.
- UART2 — auxiliary data channels.
The UARTs support low-power operation and can be used as nRF93M1 wake-up sources from System OFF sleep when the UART is configured to a baud rate of 9600 bps or less before entering System OFF.