Control B L O C K - HP 5363B Operating And Service Manual

M o d e l 5363 6
S ervic e
=ni 1 G2 1, 2 X
=0[ 1 G2 X1 2
Con t rol B l o c k s
8-53,
E l ;
8-5 4 . A c l a ss of sym b o l s f o r c o m p l e x l o g i c a re c a l l e d c o n t ro l b l o c k s . Control b l o c k s a re u sed
to show w h e re c o m m o n c o n t ro l s i g n a l s a re a p p l i e d to a g ro u p of f u n c t i o n a l l y s e p a rate u n i ts .
Exa m p l e s o f types o f c o n t ro l b l o c k s f o l l o w
D
R I G H T
so
8 - 1 2
W h e n t h e c o n t ro l l e d o r g ated i n p u t o r o u t p u t a l re a d y h a s a f u nc ti o na l l a b e l
i
X i s u se d h e re , t h a t l a b e l w i l l b e prefi xed o r s u b sc ri pt e d b y t h e i de nt i fy i n g
n u m be r.
I f a p a rti c u l a r d e v i c e h a s o n l y o n e g a t i n g o r c o n t r o l i n p ut t h e n t h e
i de n t i f y i n g n u m b e r m a y b e e l i m i n ated a n d t h e r e l a t i o n sh i p s h o w n w i th a
s u b sc ri pt.
If t h e i n p u t o r o u t p u t is a ff e c te d by m o re tha n one g ate or c o n t ro l i n p u t , t h e n
t h e i d e n t i f y i n g n u m be rs o f e a c h g ate o r c o nt r o l i n p u t w i l l a p pea r i n t h e
p ref i x o r s u b sc ri pt , s e pa rated b y c o m m a s . I n t h i s e xa m pl e " X " i s c o n t r o l l e d
" G 2 " .
b y " G 1 " a n d
R e g i s t e r c o n t ro l b l oc k . T h i s sy m b o l i s u se d w i t h a n a ssoc i a t e d a rr a y of f l i p­
f l o p sy m b o l s to p r o v i d e a p o i n t of p l ac e m e n t f o r c o m m o n f u n c t i o n l i n e s ,
s u c h a s a c o m m o n c l ea r.
S h i ft reg i st e r c o n t ro l b l o c k . T h ese s y m b o l s a re u s e d w i th a n y a rr a y o f f l i p­
f l o p s y m b o l s to f o r m a s h i f t reg i st e r . An a c t i ve t r a n s i t i o n a t t h e i n p uts c a u s e s
l eft o r r i g h t s h i ft i n g a s i n d i c a te d .
C o u n t e r c o n t ro l b l o c k . T h e sy m b o l i s u s e d w i t h a n a rr a y o f f l i p -f l o p s o r
o t h e r c i rc u i ts s e rv i n g a s a b i n a ry o r d e c a d e c o u n t e r . A n a c ti ve t ra n s i t i o n a t
t h e or i n p u t ca uses t h e c o u n t e r to i n c re m e n t o n e c o u n t u pw a rd o r
+ 1 - 1
d ow n wa rd , re s pe c t i ve l y . A n a c t i ve t ra n s i st i o n a t t h e
c o u n t e r to i n c re m e n t o n e c o u nt u pw a rd o r d o w n wa rd d e pe n d i n g o n t h e
i n p u t a t a s u p/d o w n c o nt ro l .
O u t p u t s e l e c t o r c o n t ro l b l o c k . T h i s s y m b ol i s u s e d w i t h a b l o c k s y m b o l
h a v i n g m u l t i p l e o u t p u t s to f o r m a d e c od e r. T he s e l e c t i o n l i n e s e n a b l e t h e
o u t p u t d e s i g n a te d
0 , 1 ,
i s t h e lea st s i g n i f i c a n t d i g i t . I f t h e
b.. ' w i l l b e u se d .
i n d i cators r
. . . . n e a c h b l o c k b y m e a n s of a b i na ry c o d e w h e re S O
l e v e l of t h e se l i n e s i s l o w p o l a ri t y
1
±
i n p u t c a u s e s t h e