Renesas M16C FAMILY Hardware Manual page 121

Under development Preliminary specification
Specifications in this manual are tentative and subject to change.
R8C/11 Group
UARTi transmit buffer register
(b15) (b8)
b7 b0
Notes:
1. When transfer data length is 9-bit long, write high-byte first then low-byte.
2. Use MOV instruction to write to this register.
UARTi receive buffer register
(b8)
(b15)
b7 b0
Notes:
1. Be sure to read UiRB register in 16-bit unit.
2. All of the SUM, PER, FER and OER bits are set to "0" (no error) when the SMD2 to SMD0 bits in the UiMR register are set to "000
disabled) or the RE bit in the UiC1 register is set to "0" (reception disabled). The SUM bit is set to "0" (no error) when all of the PER, FER and OER
bits are set to "0" (no error).
The PER and FER bits are set to "0" even when the higher byte of the UiRB register is read.
UARTi baud rate generation register
b7
Notes:
1. Write to this register while serial I/O is neither transmitting nor receiving.
2. Use MOV instruction to write to this register.
Figure 13.3 U0TB and U1TB Registers, U0RB and U1RB Registers, and U0BRG and U1BRG Registers
Rev.0.91 2003 Sep 08
1, 2
(i=0, 1)
Symbol
U0TB
b7 b0
U1TB
Transmit data
Nothing is assigned.
When write, set to "0". When read, its content is indeterminate.
1 (i=0, 1)
b7 b0
Bit
symbol
(b7-b0)
(b8)
Nothing is assigned.
When write, set to "0". When read, its content is indeterminate.
(b11-b9)
OER Overrun error flag
FER Framing error flag
PER
Parity error flag
SUM
Error sum flag
1, 2
(i=0, 1)
Symbol
b0
U0BRG
U1BRG
Assuming that set value = n, UiBRG divides the count source
by n + 1
page 111 of 184
Address After reset
00A3 -00A2 Indeterminate
16 16
00AB -00AA Indeterminate
16 16
Function
Symbol Address After reset
U0RB 00A7 -00A6 Indeterminate
16 16
U1RB 00AF -00AE Indeterminate
16 16
Bit name
Receive data (D
Receive data (D
2 0 : No overrun error
1 : Overrun error found
2
0 : No framing error
1 : Framing error found
2
0 : No parity error
1 : Parity error found
2
0 : No error
1 : Error found
Address After reset
00A1 Indeterminate
16
00A9 Indeterminate
16
Function
Function
to D )
7 0
)
8
" (serial I/O
2
Setting range
00 to FF
16 16
13. Serial I/O
RW
WO
RW
RO
RO
RO
RO
RO
RO
RW
WO