Renesas M16C Series User Manual

UART0 to UART2
M30240 Group
Rev.1.00 Sep 24, 2003 Page 83 of 360
Figure 1.78: Serial I/O-related registers (3)
UARTi transmit/receive control register 0
Symbol Address When reset
UiC0(i=0,1) 03A4
16 , 03AC 16 08 16
b7 b6 b5 b4 b3 b2 b1 b0
Function
(During UART mode)
WR
Function
(During clock synchronous
serial I/O mode)
TXEPT
CLK1
CLK0
CRS
CRD
CKPOL
BRG count source
select bit
Transmit register empty
flag
0 : Transmit data is output at
falling edge of transfer clock
and receive data is input at
rising edge
1 : Transmit data is output at
rising edge of transfer clock
and receive data is input at
falling edge
CLK polarity select bit
CTS/RTS function
select bit
CTS/RTS disable bit
0 0 : f 1 is selected
0 1 : f
8 is selected
1 0 : f
32 is selected
1 1 : Reserved
b1 b0
0 : LSB first
1 : MSB first
0 : Data present in transmit
register (during transmission)
1 : No data present in transmit
register (transmission
completed)
0 : CTS/RTS function enabled
1 : CTS/RTS function disabled
(P6
0 and P6 4 function as
programmable I/O port)
UFORM Transfer format select bit
0 0 : f
1 is selected
0 1 : f
8 is selected
1 0 : f
32 is selected
1 1 : Reserved
b1 b0
Valid when bit 4 = “0”
0 : CTS function is selected (Note 1)
1 : RTS function is selected (Note 2)
Valid when bit 4 = “0”
0 : CTS function is selected (Note 1)
1 : RTS function is selected (Note 2)
0 : Data present in transmit register
(during transmission)
1 : No data present in transmit
register (transmission completed)
Must always be “0”
Bit name
Bit
symbol
Must always be “0”
Note 1: Set the corresponding port direction register to “0”.
Note 2: The settings of the corresponding port register and port direction register are invalid.
0 : CTS/RTS function enabled
1 : CTS/RTS function disabled
(P6
0 and P6 4 function as
programmable I/O port)
UART2 transmit/receive control register 0
Symbol Address When reset
U2C0 037C
16 08 16
b7 b6 b5 b4 b3 b2 b1 b0
Function
(During UART mode)
WR
Function
(During clock synchronous
serial I/O mode)
TXEPT
CLK1
CLK0
CRS
CRD
CKPOL
BRG count source
select bit
Transmit register empty
flag
0 : Transmit data is output at
falling edge of transfer clock
and receive data is input at
rising edge
1 : Transmit data is output at
rising edge of transfer clock
and receive data is input at
falling edge
CLK polarity select bit
CTS/RTS function
select bit
CTS/RTS disable bit
0 0 : f 1 is selected
0 1 : f
8 is selected
1 0 : f
32 is selected
1 1 : Reserved
b1 b0
0 : LSB first
1 : MSB first
0 : Data present in transmit
register (during transmission)
1 : No data present in transmit
register (transmission
completed)
0 : CTS/RTS function enabled
1 : CTS/RTS function disabled
(P7
3 functions
programmable I/O port)
UFORM
Transfer format select bit
(Note 3)
0 0 : f
1 is selected
0 1 : f
8 is selected
1 0 : f
32 is selected
1 1 : Reserved
b1 b0
Valid when bit 4 = “0”
0 : CTS function is selected (Note 1)
1 : RTS function is selected (Note 2)
Valid when bit 4 = “0”
0 : CTS function is selected (Note 1)
1 : RTS function is selected (Note 2)
0 : Data present in transmit register
(during transmission)
1 : No data present in transmit
register (transmission completed)
Must always be “0”
Bit name
Bit
symbol
Note 1: Set the corresponding port direction register to “0”.
Note 2: The settings of the corresponding port register and port direction register are invalid.
Note 3: Only clock synchronous serial I/O mode and 8-bit UART mode are valid.
0 : CTS/RTS function enabled
1 : CTS/RTS function disabled
(P7
3 functions programmable
I/O port)
Nothing is assigned.
This bit can neither be set nor reset. When read, the value of this bit is “0”.
0 : LSB first
1 : MSB first
Nothing is assigned.
This bit can neither be set nor reset. When read, the value of this bit is “0”.

Renesas M16C Series Specifications

General

Brand	Renesas
Model	M16C Series
Category	Computer Hardware
Language	English