Time-out Counter and UART_ EFR2 description is shown in the figure：
question 1: If UART_EFR2[6](TIMEOUT_BEHAVE) = 1, whether the time-out counter in the figure refers to the values of UART_TIMEOUTL and UART_TIMEOUTH？
question 2: If UART_EFR2[6](TIMEOUT_BEHAVE) = 0, the time-out period for the UART time-out interrupt is equal to 4x the programmed word length + 12 bits in the figure.
question 3: Because of the write operation to register UART_EFR2 [6] during UART initialization, it was found that UART crash，
So what are the conditions for writing to register UART_EFR2？
