The tutorial is intended for those rolling their own boards out of an Arduino-based prototype, but it will work in any situation where you need multiple connections to a single set of UART pins.

output UART_TXD ); That’s not enough, though. You need to set the constraints to match the physical pins. The documentation is a bit of a mess in this regard because the serial port is on port B ...

Toshiba is aiming at UART and SPI interfaces with three four-channel dual-supply level-translator-transceivers. "The bus transceivers support level-up and ...