uPD789074 Subseries 8-Bit Single-Chip Microcontrollers UD - Home

CHAPTER 9 SERIAL INTERFACE 209.4.2 Asynchronous serial interface (UART) modeIn this mode, the one-byte data following the start bit is transmitted/received and thus full-duplex communication ispossible.This device incorporates a UART-dedicated baud rate generator that enables communication at the desired baudrate from many options. In addition, the baud rate can also be defined by dividing the clock input to the ASCK20 pin.The UART-dedicated baud rate generator can also output the 31.25 kbps baud rate that complies with the MIDIstandard.(1) Register settingUART mode is set by serial operation mode register 20 (CSIM20), asynchronous serial interface moderegister 20 (ASIM20), asynchronous serial interface status register 20 (ASIS20), baud rate generator controlregister 20 (BRGC20), port mode register 2 (PM2), and port 2 (P2).User’s Manual U14801EJ3V1UD 127