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A U T O H E A D L O A; A C T I V I T Y I N D I C A T O; P C B A S S E M B L Y O P T I O N C O N F I G U R A T I O N; S P E C I F I C A T I O N - Siemens 100-8D Technical Manual

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c o n t r o l l e r o v e r an F M S E P DATA l i n e , and s y n c h r o n i z e d c l o c k p u l s e s o v e r an
F M S E P CLK li n e .
f o r m a t with no m i s s i n g c l o c k p u l s e s .
Auto Head Loa d
In the b a s i c c o n f i g u r a t i o n , the r e a d / w r i t e head Is a u t o m a t i c a l l y lo ad ed when the
unit is s e l e c t e d , and is a u t o m a t i c a l l y unloa ded w he n the unit Is d e s e l e c t e d .
t i v e l y , the unit m a y b e c o n f i g u r e d to load the head in r e s p o n s e to a HDLD c o m m a n d
f r o m the c o n t r o l l e r .
A c t i v i t y I n d i c a t o r
In the b a s i c c o n f i g u r a t i o n , the a c t i v i t y I n d i c a to r is on w he n the d r i v e Is s e l e c t e d .
T h e A c t i v i t y I n d i c a t o r o p t io n p r o v i d e s a m e a n s of s u b s t it u t in g f o r the S E L E C T
s t a t u s s i g n a l , on e of the f o l l o w i n g s t a t u s s i g n a l s :
HEAD LOA D
RDY
E t c h pads a r e p r o v id e d on the m a i n pr in ted c i r c u i t b o a r d to o p t i o n a l l y OR e i t h e r
of the a b o v e s i g n a l s with IN USE.
P C B A s s e m b l y Opt ion C o n f i g u r a t i o n s
T h e m a i n p ri n te d c i r c u i t b o a r d can be s u p p li ed in a b a s i c c o n fi g u r a t i o n o r with the
o p tio n a l c o n f i g u r a t i o n in cl ud in g Hard S e c t o r and Data S e p a r a t o r .
S P E C I F I C A T I O N S
A c o m p r e h e n s i v e l i s t o f p r i n c i p a l s p e c i f i c a t i o n s a r e p ro v id ed in T a b le 1-2.
l i s t d e f i n e s bo th s i n g l e - d e n s i t y and d o u b l e - d e n s i t y c h a r a c t e r i s t i c s , both d i s k d r i v e
and i n t e r f a c e l o g i c l e v e l s , and al l p h y s i c a l and e l e c t r i c a l p a r a m e t e r s .
P r o p e r o p e r a t i o n o f the D at a S e p a r a t o r op tio n is b a s e d on a
1 -1 2
A l t e r n a
The

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