M16C6K9 Datasheet, PDF (108/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
Serial I/O
Clock synchronous serial I/O mode
UARTi transmit/receive mode registers
b7 b6 b5 b4 b3 b2 b1 b0
0
001
Symbol
UiMR(i=0,1)
Address
When reset
03A016, 03A816
0016
Bit symbol
SMD0
SMD1
SMD2
CKDIR
STPS
PRY
PRYE
SLEP
Bit name
Function
RW
b2 b1 b0
Serial I/O mode selection bits
0 0 1 : Clock synchronous serial
I/O mode
Internal/external clock
selection bit
0 : Internal clock
1 : External clock (Note 1)
Invalid in clock synchronous serial I/O mode
0 (Must always be “0” in clock synchronous serial I/O mode)
Note 1: The corresponding port direction register should be "0".
UART2 transmit/receive mode register
b7 b6 b5 b4 b3 b2 b1 b0
0
001
Symbol
U2MR
Address
037816
When reset
0016
Bit symbol
Bit name
Function
SMD0
SMD1
SMD2
CKDIR
STPS
PRY
PRYE
b2 b1 b0
Serial I/O mode selection bit
0 0 1 : Clock synchronous serial
I/O mode
Internal/external clock
selection bit
0 : Internal clock
1 : External clock (Note 2)
Invalid in clock synchronous serial I/O mode
IOPOL
TxD, RxD I/O polarity
reverse bit (Note 1)
0 : No reverse
1 : Reverse
Note 1: Usually sent to "0".
Note 2: The corresponding port direction register should be "0".
RW
Fig.GA-9 UARTi transmit/receive mode register in clock synchronous serial I/O mode
Rev.1.00 Jun 06, 2003 page 108 of 290