24.3.2.3.2 Disabling the Transmitter

A disabling of the transmitter will not become effective until ongoing and pending transmissions are completed; i.e., when the Transmit Shift Register and Transmit Buffer Register do not contain data to be transmitted. When the transmitter is disabled, it will no longer override the TxDn pin, and the pin direction is set as input automatically by hardware, even if it was configured as output by the user.