28.1.1.1 Enabling the Transmitter

The EUSART transmitter is enabled for asynchronous operations by configuring the following three control bits:

• The TXEN bit in the TXxSTA register is set to ‘1’ to enable the transmitter circuitry of the EUSART
• The SYNC bit in the TXxSTA register is set to ‘0’ to configure the EUSART for asynchronous operation
• The SPEN bit in the RCxSTA register is set to ‘1’ to enable the EUSART interface and to enable automatically the output drivers for RxyPPS selected as the TXx/CKx output

All other EUSART control bits are assumed to be in their default state.

If the TXx/CKx pin is shared with an analog peripheral, the analog I/O function must be disabled by clearing the corresponding ANSEL bit.