R5F21133DFP RENESAS [Renesas Technology Corp], R5F21133DFP Datasheet - Page 124

• Manufacturer Part Number: R5F21133DFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY/R8C/Tiny SERIES
• Manufacturer: RENESAS [Renesas Technology Corp]

R8C/13 Group
Rev.1.20
REJ09B0111-0120
Figure 13.5 U0C1 and U1C1 Registers and UCON Register
UARTi transmit/receive control register 1 (i=0, 1)
UART transmit/receive control register 2
b 7
b 7
NOTES:
1. As for the UART1, set the TXD1EN bit in the UCON register before setting this bit to reception enabled.
2. The RI bit is set to "0" when the higher byte of the UiRB register is read.
N O T E S :
1 . F o r P 3
2 . D o n o t s e t t h e T X D 1 S E L a n d T X D 1 E N b i t s t o “ 1 ” a t t h e s a m e t i m e s i n c e t h e y f u n c t i o n i n d e p e n d e n t l y .
b 6
b 6
Jan 27, 2006
S e t t h e P D 3 _ 7 b i t i n t h e P D 3 r e g i s t e r t o “ 0 ” ( i n p u t m o d e ) w h e n r e c e i v i n g .
b 5
b 5
b 4
b 4
0 0
7
, s e l e c t “ 0 ” ( R x D
b 3
b 3
b 2
b 2
b 1
b 1
page 113 of 205
b 0
b 0
T X D 1 S E L
T X D 1 E N
U 0 R R M
1
s y m b o l
(b4-b3)
( b 7 - b 4 )
s y m b o l
U0IRS
U 1 I R S
T E
T I
R E
R I
) f o r d a t a r e c e i v e , a n d “ 1 ” ( T x D
(b7)
B i t
B i t
S y m b o l
Symbol
UCON
U 0 C 1
U 1 C 1
T r a n s m i t e n a b l e b i t
T r a n s m i t b u f f e r
e m p t y f l a g
R e c e i v e e n a b l e b i t
R e c e i v e c o m p l e t e f l a g
N o t h i n g i s a s s i g n e d .
W h e n w r i t e , s e t “ 0 ” . W h e n r e a d , i t s c o n t e n t i s “ 0 ” .
UART0 transmit
interrupt cause select bit
U A R T 1 t r a n s m i t
i n t e r r u p t c a u s e s e l e c t b i t
U A R T 0 c o n t i n u o u s
r e c e i v e m o d e e n a b l e b i t
P o r t T x D
T x D
R e s e r v e d b i t
N o t h i n g i s a s s i g n e d .
W h e n w r i t e , s e t “ 0 ” . W h e n r e a d , i t s c o n t e n t i s “ 0 ” .
s e l e c t b i t
1 0
/ R x D
Bit name
Bit name
1 1
( 1 , 2 )
1
s w i t c h i n g b i t
(1 )
A d d r e s s
Address
0 0 A D
0 0 A 5
00B0
(2 )
1 0
) f o r d a t a t r a n s f e r .
(2 )
1 6
1 6
16
0 : T r a n s m i s s i o n d i s a b l e d
1 : T r a n s m i s s i o n e n a b l e d
0 : D a t a p r e s e n t i n U i T B r e g i s t e r
1 : N o d a t a p r e s e n t i n U i T B r e g i s t e r
0 : R e c e p t i o n d i s a b l e d
1 : R e c e p t i o n e n a b l e d
0 : N o d a t a p r e s e n t i n U i R B r e g i s t e r
1 : D a t a p r e s e n t i n U i R B r e g i s t e r
0 : Transmit buffer empty (Tl = 1)
1 : Transmission completed (TXEPT = 1)
0 : T r a n s m i t b u f f e r e m p t y ( T l = 1 )
1 : T r a n s m i s s i o n c o m p l e t e d ( T X E P T = 1 )
0 : C o n t i n u o u s r e c e i v e m o d e d i s a b l e d
1 : C o n t i n u o u s r e c e i v e m o d e e n a b l e
0 : I / O p o r t P 0
1 : T x D
0 : R x D
1 : T x D
Must set to “0”
A f t e r r e s e t
After reset
1 1
1 0
1
0 2
0 2
00
1 6
1 6
16
0
F u n c t i o n
F u n c t i o n
13. Serial Interface
R W
R W
R W
R O
R O
RW
R W
R W
R W
R W
R W
R W