M16C80 Datasheet, PDF (157/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
18. Clock asynchronous serial I/O (UART) mode
UARTi transmit / receive mode registers
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
UiMR(i=0,1)
Address
When reset
036016, 036816
0016
Bit symbol
Bit name
Function
SMD0
SMD1
SMD2
Serial I/O mode select bit
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
STPS
PRY
PRYE
Internal / external clock
select bit
Stop bit length select bit
Odd / even parity
select bit
Parity enable bit
0 : Internal clock
1 : External clock (Note)
0 : One stop bit
1 : Two stop bits
Valid when bit 6 = “1”
0 : Odd parity
1 : Even parity
0 : Parity disabled
1 : Parity enabled
SLEP Sleep select bit
0 : Sleep mode deselected
1 : Sleep mode selected
Note: Set the corresponding port function select register A to I/O port.
RW
UARTi transmit / receive mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
UiMR (i=2 to 4)
Address
033816, 032816, 02F816
When reset
0016
Bit symbol
Bit name
Function
SMD0
SMD1
SMD2
Serial I/O mode select bit
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
STPS
PRY
PRYE
Internal / external clock
select bit
Stop bit length select bit
Odd / even parity
select bit
Parity enable bit
0 : Internal clock
1 : External clock (Note 2)
0 : One stop bit
1 : Two stop bits
Valid when bit 6 = “1”
0 : Odd parity
1 : Even parity
0 : Parity disabled
1 : Parity enabled
IOPOL
TxD, RxD I/O polarity
reverse bit (Note 1)
0 : No reverse
1 : Reverse
Note 1: Usually set to “0”.
Note 2: Set the corresponding port function select register A to I/O port.
RW
Figure 18.1 UARTi transmit/receive mode register in UART mode
Rev.1.00 Aug. 02, 2005 ^{Page 146} of 329
REJ09B0187-0100