M16C6KA_15 Datasheet, PDF (90/270 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER Description

M16C/6KA Group
Serial I/O
UART1 transmit buffer register
(b15)
b7
(b8)
b0 b7
b0
Symbol
U1TB
Address
03AB16, 03AA16
When reset
Indeterminate
Function
Transmit data
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turn out to be indeterminate.
RW
UART1 receive buffer register
(b15)
b7
(b8)
b0 b7
b0
Symbol
Address
When reset
U1RB 03AF16, 03AE16 Indeterminate
Bit
symbol
Bit name
Function
(During clock synchronous
serial I/O mode)
Receive data
Function
(During UART mode)
Receive data
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
OER Overrun error flag (Note 1) ^{0 : No overrun error}
1 : Overrun error found
0 : No overrun error
1 : Overrun error found
FER Framing error flag (Note 1) Invalid
PER Parity error flag (Note 1) Invalid
SUM Error sum flag (Note 1) Invalid
0 : No framing error
1 : Framing error found
0 : No parity error
1 : Parity error found
0 : No error
1 : Error found
RW
Note 1: Bits 15 through 12 are set to “0” when the serial I/O mode selection bits (bits 2 to 0 at address
03A816) are set to “0002” or the receive enable bit is set to “0”.
(Bit 15 is set to “0” when bits 14 to 12 all are set to “0”.) Bits 14 and 13 are also set to “0” when the
lower byte of the UART1 receive buffer register (address 03AE16) is read out.
UART1 bit rate generator
b7
b0
Symbol
U1BRG
Address
03A916
When reset
Indeterminate
Function
Assuming that set value = n, BRG1 divides the count source by
n+1
Values that can be set
0016 to FF16
RW
Fig.GA-3 Serial I/O-related registers (1)
Rev.1.00 Jul 16, 2004 page 88 of 266
REJ03B0100-0100Z