m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 87

• Manufacturer Part Number: m5m51016btp
• Description: Renesas 16-bit Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

M30245 Group
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
Figure 2.4.16. Operation timing of reception in UART mode (used for SIM interface)
T r a n s f e r c l o c k
Receive enable
bit
R
T
Signal line level
(Note)
R e c e i v e
c o m p l e t e f l a g
R e c e i v e i n t e r r u p t
r e q u e s t b i t
Example of wiring
Example of operation (when inversed format)
X
X
(RE)
D
D
i
i
( N o t e )
(Note)
( I R )
N o t e : T x D
( R I )
“1”
“0”
“1”
“0”
“1”
“0”
b e c o m e t h e s a m e s i g n a l f r o m t h e l o g i c a l s t a n d p o i n t , b u t t h e o u t p u t s i g n a l s t u r n c o m p l e x , s o t h e y a r e s h o w n s e p a r a t e l y . A l s o ,
t h e s i g n a l l e v e l r e s u l t i n g f r o m c o n n e c t i n g T x D
T h e a b o v e t i m i n g a p p l i e s t o t h e f o l l o w i n g s e t t i n g s :
Shown in ( ) are bit symbols.
( 1 ) R e c e p t i o n e n a b l e d
• P a r i t y i s e n a b l e d .
• O n e s t o p b i t .
• 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 = “ 1 ” .
i
page 78 of 354
a n d R x D
Microcomputer
Note1: TxDi pin is N-channel open drain and needs a pull-up resistance.
Note2: i=0 to 3
( 2 ) S t a r t r e c e p t i o n
S t a r t
S T
S T
i
a r e c o n n e c t e d i n t h e m a n n e r o f w i r e d O R a s s h o w n i n t h e c o n n e c t i o n d i a g r a m . S o T x D
b i t
D
D
0
0
RxD
CLK
TxD
D
D
1
1
T c
D
D
2
2
i
i
i
D
D
3
3
D
D
4
4
External clock
D
D
5
5
D
D
6
6
Cleared to “0” when interrupt request is accepted, or cleared by software
i
D
D
Parity
a n d R x D
7
7
bit
P
(Note)
P
(3) Receiving is completed
SP
SP
i
Tc = 16 (n + 1) / fi or 16 (n + 1) / f
S t o p
i s s h o w n a s a s i g n a l l i n e l e v e l .
b i t
( 4 ) D a t a i s r e a d
R e a d t o r e c e i v e b u f f e r
f
EXT :
fi : frequency of BRGi count source (f
n : value set to BRGi
SIM card
frequency of BRGi count source (external clock)
S T
S T
S i n c e a p a r i t y e r r o r o c c u r r e d , t h e
“ L ” l e v e l r e t u r n s f r o m T x D
D
D
0
0
D
D
1
1
D
D
2
2
D
D
3
3
EXT
D
D
4
4
D
D
5
5
i
D
D
6
6
1
, f
D
D
i
a n d R x D
7
7
8
, f
P
P
32
( 5 ) P a r i t y e r r o r o c c u r r e d
)
Read to receive buffer
S P
i
S P
o u g h t t o
2. SIM interface