SLAU320AJ July 2010 – May 2021
TRSLDIR |= TDOI_DIR sets the SN74LVC1T45 transceiver on the board to Hi-Z, and TRSLDR &= TDOI_DIR sets it back to being driven.
TRSLDIR |= TDOI_DIR
TRSLDR &= TDOI_DIR
Used for reading TDO value during TDO slot.