LPUART request register
| SBKRQ | Send break request Writing 1 to this bit sets the SBKF flag and request to send a BREAK on the line, as soon as the transmit machine is available. Note: If the application needs to send the break character following all previously inserted data, including the ones not yet transmitted, the software should wait for the TXE flag assertion before setting the SBKRQ bit. |
| MMRQ | Mute mode request Writing 1 to this bit puts the LPUART in Mute mode and resets the RWU flag. |
| RXFRQ | Receive data flush request Writing 1 to this bit clears the RXNE flag. This enables discarding the received data without reading it, and avoid an overrun condition. |
| TXFRQ | Transmit data flush request This bit is used when FIFO mode is enabled. TXFRQ bit is set to flush the whole FIFO. This sets the flag TXFE (TXFIFO empty, bit 23 in the LPUART_ISR register). Note: In FIFO mode, the TXFNF flag is reset during the flush request until TxFIFO is empty in order to ensure that no data are written in the data register. |