Serial Interface - Renesas M16C Series Hardware Manual

R8C/11 Group
1 S P
R x D i
S P
2 S P
S P S P
Figure 13.2 UARTi Transmit/Receive Unit
Rev.1.20 Jan 27, 2006
REJ09B0062-0120
C l o c k
PRYE=0
s y n c h r o n o u s
P A R
t y p e
d i s a b l e d
S P P A R
U A R T
PAR
enabled
P R Y E = 1
0 0 0 0 0 0
P R Y E = 1
P A R
U A R T
2SP e n a b l e d
PAR
1 S P
P A R C l o c k
d i s a b l e d s y n c h r o n o u s
t y p e
PRYE=0
"0"
page 110 of 204
Clock
synchronous
type
UART (7 bits)
U A R T ( 7 b i t s )
UART (8 bits)
UART (9 bits)
Clock
synchronous type
UART (8 bits)
UART (9 bits)
0
D D D D
8 7 6 5
M S B / L S B c o n v e r s i o n c i r c u i t
Data bus high-order bits
Data bus low-order bits
MSB/LSB conversion circuit
D D D
D
7 6 5
8
U A R T ( 8 b i t s )
U A R T ( 9 b i t s )
C l o c k
UART (9 bits)
s y n c h r o n o u s
t y p e
UART (7 bits)
U A R T ( 7 b i t s )
U A R T ( 8 b i t s )
C l o c k
s y n c h r o n o u s t y p e
N O T E S :
1 . C l o c k s y n c h r o n o u s t y p e i s p r o v i d e i n U A R T 0 o n l y .

13. Serial Interface

U A R T i r e c e i v e r e g i s t e r
UiRB register
D D D D D
4 3 2 1 0
U i T B r e g i s t e r
D D D D D
4 3 2 1 0
U A R T i t r a n s m i t r e g i s t e r
i=0, 1
SP: Stop bit
PAR: Parity bit
TxDi