4.7 UART TX Indication (PA2)

This dedicated pin is going to be active for some milliseconds prior to UART TX data. The UART TX indication is to wake up the host MCU prior to UART data so that the host MCU can handle data correctly. This functionality is helpful in scenarios where the host MCU can effectively wake up from Sleep mode or Low Power mode by monitoring the UART TX Indication pin of the RNBD451 module.

The user can configure the UART TX indication using the Set UART Tx Indication (STI,<hex8>,<hex8>) command. For more details, refer to 5.5.13 Set UART TX Indication (STI,<hex8>,<hex8>).