Renesas M16C Series User Manual page 69

M30245 Group
UARTi transmit buffer register (i= 0 to 3) (Note)
b15
(b7)
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UARTi receive buffer register (i= 0 to 3)
b15
(b7)
Figure 2.4.3. UARTi-related registers (1)
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
b8
Symbol
(b0) b7 b0
U0TB
U1TB
U2TB
U3TB
Bit Symbol
(clock synchronous serial I/O mode)
Note: Use MOV instruction to write to this register.
Symbol
b8
(b0) b7 b0
U0RB
U1RB
U2RB
U3RB
Bit Symbol
ABT
OER
FER
PER
SUM
Note 1: Always write "0".
Note 2: Bits 15 to 12 are set to "0000
addresses 03A8
bit is set to "0". Bit 15 is set to "0" when all of bits 14 to 12 are set to "0".
Bits 14 and 13 are also set to "0" when the lower byte of the UARTi receive buffer
register (addresses 03AE
page 60 of 354
Address
03AB , 03AA
16 16
036B , 036A
16 16
033B , 033A
16 16
032B , 032A
16 16
Function
Transmit data
Nothing is assigned. Write "0" when writing to these bits.
The values are indeterminate when read.
Address
03AF , 03AE
16 16
036F , 036E
16 16
033F , 033E
16 16
032F , 032E
16 16
Function
Bit Name
(clock synchronous
serial I/O mode)
Receive data
Nothing is assigned. Write "0" when writing to these bits.
The values are indeterminate when read.
Arbitration lost 0 : Not detected
detecting flag (Note 1) 1 : Detected
Overrun error flag
0 : No overrun error
(Note 2)
1 : Overrun error
Framing error flag
Invalid
(Note 2)
Parity error flag
Invalid
(Note 2)
Error sum flag
Invalid
(Note 2)
" when the serial I/O mode select bit (bits 0 to 2 at
2
, 0368 , 0338 , 0328
16 16 16
, 036E , 033E
16 16
When reset
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Function
(UART mode)
Transmit data
Transmit data (9th bit)
When reset
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Function
(UART mode)
Receive data
Receive data (9th bit)
Invalid
0 : No overrun error
1 : Overrun error
0 : No framing error
1 : Framing error
0 : No parity error
1 : Parity error
0 : No error
1 : Error
) are set to "000 " or the receive enable
16 2
, 032E ) is read.
16 16
2. UART
R W
R W