M16C User Manual.pdf

Clock-Synchronous Serial I/OMitsubishi microcomputersM16C / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTERSetting UART1 transmit/receive mode registerb70 0 0b00 1UART1 transmit/receive mode register [Address 03A816]U1MRMust be fixed to “001”Internal/external clock select bit0 : Internal clockInvalid in clock synchronous I/O modeInvalid in clock synchronous I/O modeInvalid in clock synchronous I/O modeSleep select bitMust be “0” in clock synchronous I/O modeSetting UART1 transmit/receive control register 0b70 01b0UART1 transmit/receive control register 0 [Address 03AC16]U1C0BRG count source select bitb1 b00 0 : f1 is selected0 1 : f8 is selected1 0 : f32 is selected1 1 : InhibitedValid when bit 4 = “0”Transmit register empty flag0 : Data present in transmit register (during transmission)1 : No data present in transmit register (transmission completed)CTS/RTS disable bit1 : CTS/RTS function disabledData output select bit0 : TXDi pin is CMOS output1 : TxDi pin is N-channel open-drain outputCLK polarity select bit0 : Transmission data is output at falling edge of transfer clock andreception data is input at rising edgeTransfer format select bit0 : LSB firstSetting UART transmit/receive control register 2b71 1b0UART transmit/receive control register 2 [Address 03B016]UCONUART0 transmit interrupt cause select bit1 : Transmission completed (TXEPT = 1)CLK/CLKS select bit 00 : Clock output to CLK11 : Clock output to CLKS1CLK/CLKS select bit 11 : Transfer clock output from multiple pins function selectedInvalid when bit 5 = “1”Continued to the next pageFigure 2.4.11. Set-up procedure of transmission in clock-synchronous serial I/O mode, transferclock output from multiple pins function selected (1)340