24.8.6 Disabling the Receiver

In contrast to the transmitter, disabling of the receiver will be immediate. Data from ongoing receptions will, therefore, be lost. When disabled (i.e., UCSRnB.RXEN is written to zero) the receiver will no longer override the normal function of the RxDn port pin. The receiver buffer FIFO will be flushed when the receiver is disabled. Remaining data in the buffer will be lost.