2.5.1 Disabling of USART Transmitter Does Not Automatically Set the TxD Pin 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.

Workaround

The TxD pin direction can be set to input using the Port DIR register. Be advised that setting the Port DIR register to input will be immediate. Ongoing transmissions will be truncated.

Affected Silicon Revisions


ATxmega128/64B3
Rev. A	Rev. C
X	-

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