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DRA821U: Register UART_ EFR2

Shine
Genius 13655 points

Part Number: DRA821U

Hello Champs,

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？



Thanks
Regards
Shine

  • 0
    TI__Genius 17156 points

    1) Yes, the value is the 16-bit combination of the two fields:

    TIMEOUT_L - Custom timeout period in baud clocks, to override the internal value, when different from 0. [Lower byte of the 16 bit value]
    TIMEOUT_H - Custom timeout period in baud clocks, to override the internal value, when different from 0. [Higher byte of the 16 bit value]

    2) Correct

    3) Please refer to a TI driver for example of the correct programming sequence.