Renesas M16C Series User Manual

UART0 to UART2
M30240 Group
Rev.1.00 Sep 24, 2003 Page 92 of 360
Figure 1.87: UARTi transmit/receive mode register.
Table 1.28 lists the functions of the input/output pins during UART mode. Note that for a period from
when the UARTi operation mode is selected to when transfer starts, the TxDi pin outputs a “H”.
Table 1.28: Input/output pin functions in UART mode
Pin name Function Method of selection
TxDi
(P6
3
, P6
7
, P7
0
)
Serial data
output
Outputs dummy data when performing reception.
RxDi
(P6
2
, P6
6
, P7
1
)
Serial data input
Port P6
2
, P6
6
, and P7
1
direction register (bits 2 and 6 at address 03EE
16
bit 1 at address
03EF
16
)= “0”
(Can be used as an input port when performing transmission only.)
CLKi
(P6
1
, P6
5
, P7
2
)
Programmable I/
O port
Internal/external clock select bit (bit 3 at address 03A0
16
, 03A8
16
, 0378
16
) = “0”
Transfer clock
input
Internal/external clock select bit (bit 3 at address 03A0
16
, 03A8
16
) = “1”
Port P6
1
, P6
5
direction register (bits 1 and 5 at address 03EE
16
) = “0”
CTS
i/RTSi
(P6
0
,P6
4
,P7
3
)
CTS
input
CTS
/RTS disable bit (bit 4 at address 03A4
16
, 03AC
16
, 037C
16
) = “0”
CTS
/RTS function select bit (bit 2 at address 03A4
16
, 03AC
16
, 037C
16
) = “0”
Port P60, P64 and P73 direction register (bits 0 and 4 at address 03EE
16
, bit 3 at address
03EF
16
) = “0”
RTS
output
CTS
/RTS disable bit (bit 4 at address 03A4
16
, 03AC
16
, 037C
16
) = “0”
CTS
/RTS function select bit (bit 2 at address 03A4
16
, 03AC
16
, 037C
16
) = “1”
Programmable I/
O port
CTS
/RTS disable bit (bit 4 at address 03A4
16
, 03AC
16
, 037C
16
) = “1”
Symbol Address When reset
UiMR(i=0,1) 03A0
16, 03A816 0016
CKDIR
UARTi transmit / receive mode registers
Internal / external clock
select bit
STPS
PRY
PRYE
SLEP
0 : Internal clock
1 : External clock (Note)
Bit name FunctionBit symbol
WR
b7 b6 b5 b4 b3 b2 b1 b0
SMD0
SMD1
SMD2
Serial I/O mode select bit
b2 b1 b0
0 : One stop bit
1 : Two stop bits
0 : Parity disabled
1 : Parity enabled
0 : Sleep mode deselected
1 : Sleep mode selected
1 0 0 : Transfer data 7 bits long
1 0 1 : Transfer data 8 bits long
1 1 0 : Transfer data 9 bits long
Valid when bit 6 = “1”
0 : Odd parity
1 : Even parity
Stop bit length select bit
Odd / even parity
select bit
Parity enable bit
Sleep select bit
Symbol Address When reset
U2MR 0378
16 0016
CKDIR
UART2 transmit / receive mode register
Internal / external clock
select bit
STPS
PRY
PRYE
IOPOL
Must always be fixed to “0”
Bit name FunctionBit symbol
WR
b7 b6 b5 b4 b3 b2 b1 b0
SMD0
SMD1
SMD2
Serial I/O mode select bit
b2 b1 b0
0 : One stop bit
1 : Two stop bits
0 : Parity disabled
1 : Parity enabled
0 : No reverse
1 : Reverse
1 0 0 : Transfer data 7 bits long
1 0 1 : Transfer data 8 bits long
1 1 0 : Transfer data 9 bits long
Valid when bit 6 = “1”
0 : Odd parity
1 : Even parity
Stop bit length select bit
Odd / even parity
select bit
Parity enable bit
TxD, RxD I/O polarity
reverse bit (Note)
Note: Usually set to “0”.
Note: Set the corresponding port direction register to "0".

Renesas M16C Series Specifications

General

Brand	Renesas
Model	M16C Series
Category	Computer Hardware
Language	English