he operation of the controller, this signal is used to prevent the processing of frames while there is another frame being sent by the UART transmitter.</td>
    </tr>
    <tr>
        <td>parallel_data_valid_synchronized</td>
        <td>input</td>
        <td align="center">1</td>
        <td>A synchrnoized signal to indicate that there exist new data received by the UART receiver.</td>
    </tr>
    <tr>
        <td>parallel_data_synchronized</td>
        <td>output</td>
        <td align="center">DATA_W