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8-4. Explanation of functions
o Selector pins
For increased freedom in the selection of the signal
p r o c e s s o r L S I l C , t h e d i g i t a l o u t p u t s i g n a l d e m o d u l a t o r l C
is equipped with various selectors that can select the inter-
n a l f u n c t i o n s a c c o r d i n g t o t h e s i g n a l p r o c e s s o r L S I l C u s e d .
T E S T ( p i n ' i 7 ) : T e s t m o d e s e t t i n g i n p u t . F i x e d a t " L " .
R S E T ( p i n 1 8 ) : W h e n T E S T i s " L " , t h e s i g n a l d e m o -
C I R C I U T D E S C R I P T I O N
Table 8-2
LSI lC are set by the
" H " a n d s t o p s w h e n i t i s " L " . W h e n
t h e L S I i s n o t o p e r a t i n g , o n l y 1 9 2 F s i s
output norrnally while other outputs
are fixed.
The following five pins are the selector pins which sets
t h e s i g n a l p r o c e s s o r L S I l C .
) u
eTt
l :
The modes of the signal processor
above methods.
8-3. Explanation of terminals
Terminal No.
Symbol
vo
Function
B C K
I
B i t c l o c k i n p u t . C o n n e c t t h e c l o c k w h i c h s h i f t s o u t d a t a i n t h e e x t e r n a l d i g i t a l a u d i o d a t a o u t p u t c i r c u i t .
DATA
D i g i t a l a u d i o d a t a i n p u t ( N R Z ) .
L F I C K
I
C l o c k i n p u t f o r L / R c h a n n e l i d e n t i f i c a t i o n o f d i g i t a l a u d i o d a t a i n p u t .
T h e f r e q u e n c y i s e q u a l t o F s ( s a m p l i n g f r e q u e n c y ) .
4
V R D T Y
I
V a l i d i t y f l a g i n p u t .
" H "
f l a q i s u s e d w h e n t h e d a t a i s b e i n g p r o c e s s e d b y i n t e r p o l a t i o n , e t c .
5
c l 0
I
C - b i t c a t e g o r y c o d e C 1 0 p r e s e t t i n g i n p u t .
6
L N U T
I
C-bit block start sync input. When CX23035 is used, connected this terminal to the CBCF output (pin 12),
I n other cases, the siqnal is fixed at "H".
7
Vss
G N D .
8
C K S L
Input for selecting if the reference clock is EXTAL or its 1/3.
Y
LSFT
I n p u t f o r s e l e c t i n g b e t w e e n L S B f i r s r a n d M S B f i r s t o p e r a t i o n .
1 0
X I L R
l n p u t f o r s e l e c t i n g b e t w e e n L R C K " H " a n d
" L "
1 1
I N V B
l n p u t f o r s e l e c t i n g i f B C K t i m i n g u s e d i s t h e r i s e o r f a l l
1 2
t s , z r s
U
C l o c k o u t p u t f o r u s e a s C D m a s t e r c l o c k w h e n C D i s c o n n e c t e d .
T h e f r e q u e n c y i s 1 9 2 t i m e s t h e s a m p l i n g f r e q u e n c y .
I J
X T A L
o
W h e n a X ' t a l o s c i l l a t o r i s u s e d . i t i s c o n n e c t e d a c r o s s t h i s p i n a n d E X T A L ( p i n 1 4 )
1 4
E X T A L
W h e n a X ' t a l o s c i l l a t o r i s u s e d , i t i s c o n n e c t e d a c r o s s t h i s p i n a n d X T A L ( p i n 1 3 ) . I n o t h e r c a s e s , t h i s p i n
i s u s e d f o r e x t e r n a l c l o c k i n p u t .
1 5
TX
o
O u t p u t o f t r a n s m i s s i o n d a t a c o n v e r t e d i n t o t h e d i g i t a l i n t e r f a c e f o r m a t .
t o
C - b i t c a t e g o r y c o d e C 9 p r e s e t t i n g i n p u t .
I t r J t
T e s t m o d e s e l e c t i n D u t . F i x e d a t
" L "
i n n o r m a l o p e r a t i o n .
't
8
R S E T
L S I o p e r a t i o n s t a r t / s t o p i n p u t .
" H "
d u r i n g o p e r a t i o n
I Y
C B S L
I n p u t f o r s e l e c t i n g i f t h e C - b i t i n p u t i s s e r i a l o r p a r a l l e l .
20
D 7
C 4 { E m p h a s i s i n f o r m a t i o n ) p r e s e t t i n q i n p u t w h e n C - b i t i n p u t i s p a r a l l e l .
2 1
V D D
+ 5 V .
22
U O
I
C 3 ( C o p y I n h i b i t i n f o r m a t i o n ) p r e s e t t i n q i n p u t w h e n C - b i t i n p u t i s p a r a l l e l .
ZJ
D 5
C 2 ( l D 1 ) p r e s e t t i n g i n p u t w h e n C - b i t i n p u t i s p a r a l l e l .
. A
D 4
I
C 1 ( l D 0 ) p r e s e t t i n g i n p u t w h e n C - b i t i n p u t i s p a r a l l e l . W h e n i t i s s e r i a l , u s e d a s S U B O i n p u t w h i c h p r o -
v i d e s C 1 t o C 4 .
25
I
S C O R i n p u t w h i c h i n d i c a t e s t h e s t a r t o f s u b c o d e b l o c k t o b e i n c l u d e d i n U - b i t d a t a .
26
D 2
W F C K i n p u t w h i c h i n d i c a t e s t h e f r a m e o f s u b c o d e t o b e i n c l u d e d i n U - b i t d a t a .
27
D1
S e r i a l i n p u t f o r s u b c o d e t o b e i n c l u d e d i n U - b i t d a t a . ( C o n n e c t e d t o S B S O ) .
28
E X C K
C l o c k o u t p u t t o b e s u p p l i e d t o t h e e x t e r n a l s u b c o d e o u t p u t c i r u c i t i n o r d e r t o s h i f t s u b c o d e o u t .
{ C o n n e c t E X C K ) .
Table 8-1
d u l a t o r t s l l C o p e r a t e s w h e n R S E T i s
T e r m i n a l N o ,
Symbol
Doscription
I
C K S L
F i x e d a t " H " w h e n E X T A L i n p u t i s 3 8 4 F s , " L " w h e n i t i s 1 2 8 F s
L S F T
F i x e d a t " H " w h e n D A T A i n p u t i s M S B f i r s t , a n d " L " w h e n i t i s L S B f i r s t .
1 0
X I L B
F i x e d a t
" L "
w h e n L B C K i n p u t i s L - c h a n d " H " . " H "
w h e n i t i s
" L "
1 1
I N V B
F i x e d a t " L " w h e n D A T A i s s h i f t e d a t t h e f a l l i n g e d g e o f B C K ,
" H "
w h e n i t i s s h i f t e d a t t h e r i s i n q e d q e .
I Y
C B S L
F i x e d a t " L " w h e n C - b i t i n p u t i s s e r i a l , " H " w h e n i t i s p a r a l l e l .
1 7
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