SPRUHZ7K August 2015 – April 2024 AM5706 , AM5708 , AM5716 , AM5718 , AM5718-HIREL
Overrun during receive occurs if the RX state-machine tries to write data into the RX FIFO when it is already full. When overrun occurs, the device interrupts the MPUwith the UARTi.UART_IIR[5:1] IT_TYPE bit field set to 0x3 (receiver line status error) and discards the remaining portion of the frame.
Overrun also causes an internal flag to be set, which disables further reception. Before the next frame can be received, the MPU must: