M16C30L Datasheet, PDF (113/166 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Clock asynchronous serial I/O (UART) mode
Mitsubishi microcomputers
M16C / 30L Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
UARTi transmit / receive mode registers
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
UiMR(i=0,1)
Address
When reset
03A016, 03A816
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 direction register to “0”.
RW
UART2 transmit / receive mode register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
U2MR
Address
037816
When reset
0016
Bit symbol
Bit name
SMD0
SMD1
SMD2
Serial I/O mode select bit
CKDIR
STPS
Internal / external clock
select bit
Stop bit length select bit
PRY
Odd / even parity
select bit
PRYE Parity enable bit
IOPOL
TxD, RxD I/O polarity
reverse bit (Note)
Note: Usually set to “0”.
Function
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
Must always be “0”
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
0 : No reverse
1 : Reverse
RW
Figure 1.16.16. UARTi transmit/receive mode register in UART mode
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