SPRUJB6B November 2024 – May 2025 AM2612
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 Host CPU with the UART_IIR_UART[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 Host CPU must: