M16C6KA_15 Datasheet, PDF (104/270 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER Description

M16C/6KA Group
Clock asynchronous serial I/O (UART) mode
UART1 transmit / receive mode registers
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
U1MR
Address
03A816
When reset
0016
Bit symbol
Bit name
Function
RW
SMD0
SMD1
SMD2
Serial I/O mode selection bits ^{b2 b1 b0}
1 0 0 : Transfer data 7 bits long
1 0 1 : Transfer data 8 bits long
1 1 0 : Transfer data 9 bits long
CKDIR
Internal / external clock
selection bit
0 : Internal clock
1 : External clock (Note 1)
STPS Stop bit length select bit
0 : One stop bit
1 : Two stop bits
PRY
Odd / even parity select bit
Valid when bit 6 = “1”
0 : Odd parity
1 : Even parity
PRYE Parity enable bit
IOPOL
TxD, RxD I/O polarity
switching bit (Note 2)
0 : Parity disabled
1 : Parity enabled
0 : No reverse
1 : Reverse
Note 1: The corresponding port direction register should be "0".
Note 2: Usually set to “0”.
Fig.GA-13 UARTi transmit/receive mode register in UART mode
Rev.1.00 Jul 16, 2004 page 102 of 266
REJ03B0100-0100Z