M16C6S_09 Datasheet, PDF (102/208 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6S Group
Clock Synchronous serial I/O Mode
Table 1.14.2. Registers to Be Used and Settings in Clock Synchronous Serial I/O Mode
Register
Bit
Function
UiTB(Note3) 0 to 7
Set transmission data
UiRB(Note3) 0 to 7
Reception data can be read
OER
Overrun error flag
UiBRG 0 to 7
Set a transfer rate
UiMR(Note3) SMD2 to SMD0 Set to “0012”
CKDIR
Select the internal clock or external clock
IOPOL
Set to “0”
UiC0
CLK1 to CLK0
CRS
Select the count source for the UiBRG register
_______
_______
Select CTS or RTS to use
TXEPT
CRD
Transmit register empty flag
_______
_______
Enable or disable the CTS or RTS function
NCH
Select TxDi pin output mode
CKPOL
Select the transfer clock polarity
UFORM
Select the LSB first or MSB first
UiC1
TE
Set this bit to “1” to enable transmission/reception
TI
Transmit buffer empty flag
RE
Set this bit to “1” to enable reception
RI
Reception complete flag
U2IRS (Note 1) Select the source of UART2 transmit interrupt
U2RRM (Note 1) Set this bit to “1” to use continuous receive mode
UiLCH
Set this bit to “1” to use inverted data logic
UiERE
Set to “0”
UiSMR 0 to 7
Set to “0”
UiSMR2 0 to 7
Set to “0”
UiSMR3 0 to 2
Set to “0”
NODC
Select clock output mode
4 to 7
Set to “0”
UiSMR4 0 to 7
Set to “0”
UCON
U0IRS, U1IRS
Select the source of UART0/UART1 transmit interrupt
U0RRM, U1RRM Set this bit to “1” to use continuous receive mode
CLKMD0
Select the transfer clock output pin when CLKMD1 = 1
CLKMD1
RCSP
Set this bit to “1” to output UART1 transfer clock from two pins
_________
Set this bit to “1” to accept as input the UART0 CTS0 signal from the P64 pin
7
Set to “0”
Note 1: Set the U0C1 and U1C1 register bit 4 and bit 5 to “0”. The U0IRS, U1IRS, U0RRM and U1RRM bits
are in the UCON register.
Note 2: Not all register bits are described above. Set those bits to “0” when writing to the registers in clock
synchronous serial I/O mode.
i=0 to 1
Rev.5.01 Dec 10, 2009 page 102 of 201
REJ03B0014-0501