
R8C/14 Group, R8C/15 Group 14. Serial Interface
Rev.2.10 Jan 19, 2006 Page 126 of 253
REJ09B0164-0210
Figure 14.2 UART0 Transmit/Receive Unit
RXD0
1SP
2SP
SP
SP PAR
PRYE=0
PAR
disabled
PAR
enabled
PRYE=1
UART
UART (9 bits)
D7 D6 D5 D4 D3 D2 D1 D0
UART0 receive register
U0RB register
0000000D8
MSB/LSB conversion circuit
Data bus high-order bits
Data bus low-order bits
D7 D6 D5 D4 D3 D2 D1 D0
U0TB register
D8
TXD0
1SP
2SP
SP
SP PAR
UART0 transmit register
"0"
SP: Stop bit
PAR: Parity bit
Note: Clock synchronous type is provide in UART0 only.
UART (7 bits)
UART (8 bits)
Clock
synchronous
type
Clock
synchronous
type
UART (7 bits)
Clock
synchronous
type
UART (7 bits)
Clock
synchronous
type
UART (8 bits)
UART (9 bits)
UART (7 bits)
UART (8 bits)
Clock
synchronous
type
UART (9 bits)
UART
PRYE=1
PAR
enabled
PAR
disabled
PRYE=0
Clock
synchronous
type
MSB/LSB conversion circuit
UART (8 bits)
UART (9 bits)
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