Renesas M16C Series User Manual page 227

M30240 Group
UART transmit/receive control register 2
b7 b6 b5 b4 b3 b2 b1 b0
0
Figure 2.61: UARTi related registers (5)
Rev.1.00 Sep 24, 2003 Page 209 of 360
Symbol Address
UCON 03B0
Bit
Bit name
symbol
U0IRS UART0 transmit
interrupt cause select bit
U1IRS UART1 transmit
interrupt cause select bit
U0RRM UART0 continuous
receive mode enable bit
U1RRM UART1 continuous
receive mode enable bit
CLKMD0 CLK/CLKS select bit 0
CLKMD1 CLK/CLKS select
bit 1 (Note)
Reserved
Nothing is assigned.
Write "0" when writing to this bit. The value is "0" when read.
Note: When using multiple pins to output the transfer clock, the following requirements must be met:
• UART1 internal/external clock select bit (bit 3 at address 03A8
When reset
X0000000
16 2
Function
(During clock synchronous
serial I/O mode)
0 : 0 : Transmit buffer empty (Tl = 1)
Transmit buffer empty (Tl = 1)
1 : Transmission completed 1 : Transmission completed
(TXEPT = 1)
0 : 0 : Transmit buffer empty (Tl = 1)
Transmit buffer empty (Tl = 1)
1 : Transmission completed 1 : Transmission completed
(TXEPT = 1)
0 : Continuous receive Invalid
mode disabled
1 : Continuous receive
mode enable
0 : Continuous receive Invalid
mode disabled
1 : Continuous receive
mode enabled
Valid when bit 5 = "1" Invalid
0 : Clock output to CLK1
1 : Clock output to CLKS1
0 : Normal mode Must always be "0"
(CLK output is CLK1 only)
1 : Transfer clock output
from multiple pins
function selected
Must always be "0"
Clock-Asynchronous Serial I/O
Function
R W
(During UART mode)
(TXEPT = 1)
(TXEPT = 1)
) = "0".
16