M16C6KA_15 Datasheet, PDF (94/270 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER Description

M16C/6KA Group
Serial I/O
UART transmit/receive control register 2
b7 b6 b5 b4 b3 b2 b1 b0
0
00
Symbol
UCON
Address
03B016
When reset
X00000002
Bit
symbol
Bit name
Function
(During clock synchronous
serial I/O mode)
Function
(During UART mode)
RW
Reserved bit
Must always be “0”
U1IRS
UART1 transmit interrupt
factor selection bit
0 : Transmit buffer empty (Tl = 1) 0 : Transmit buffer empty (Tl = 1)
1 : Transmission completed
1 : Transmission completed
(TXEPT = 1)
(TXEPT = 1)
Reserved bit
Must always be “0”
U1RRM UART1 continuous
receive mode enable bit
CLKMD0 CLK/CLKS selection bit 0
0 : Continuous receive mode
disabled
1 : Continuous receive mode
enabled
Valid when bit 5 = “1”
0 : Clock output to CLK1
1 : Clock output to CLKS1
Invalid
Invalid
CLKMD1 CLK/CLKS selection bit 1
(Note)
0 : Normal mode
Must always be “0”
(CLK output is CLK1 only)
1 : Transfer clock output from
multiple pins function selected
Reserved bit
Must always be “0”
Nothing is assigned.
In an attempt to write to this bit, write “0”. The value, if read, turns out to be indeterminate.
Note: When using multiple pins to output the transfer clock, the following requirements must be met:
• UART1 internal/external clock selection bit (bit 3 at address 03A816) = “0”.
Fig.GA-7 Serial I/O-related registers (5)
Rev.1.00 Jul 16, 2004 page 92 of 266
REJ03B0100-0100Z