2.8.1 Disabling the USART Transmitter Does not Automatically set the TxD Pin Direction to Input

If the USART transmitter is idle with no frames to transmit, setting TXEN to zero will not automatically set the TxD pin direction to input.

Work Around

The TxD pin direction can be set to input using the Port pin direction to input using the port Direction (DIR) register. When the port pin direction is input, it will be immediate and ongoing transmissions will be truncated.

Affected Silicon Revisions