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Hitachi MP-1802 Technical Manual page 38

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2 .
M O T O R O N
W h e n M O f t R - O N = t f L f r , t h e d r i v e
m o t o r r u n s .
3. ffi
W h e n t h e S T E P s i g n a l
i s
i n p u t ,
i t
c o n t r o l s
t h e h e a d m o v e m e n t
d i r e c t i o n .
W h e n f f i
= f r l r r , t h e h e a d m o v e s i n t h e
I N d i r e c t i o n ( t o w a r d . T r a c k 3 9 ) a n d w h e n f f i = | ' H | l '
t h e h e a d m o v e s i n t h e O U T d i r e e t i o n
( T r a c k 0 0 ) .
/r. sm
W h e n S m F
= t t 1 r
t t ( L o w p u l s e ) t h e h e a d n o v e s o n e t r a c k
i n t h e d i r e c t i o n
d e c i d e d b y t h e f f i
s i g n a l .
5. Tm-ftlD
W h e n E m m = | t L | | ' t h e h e a d ' 1 o a d s o 1 e n o i d i s a c t i v a t e d
if
mffi
= rtlff o
6.
STDE-T
W h e n S r D E 1 -
r f l f r a n d S i d e
t
h e a d i s
s e l e c t e d
o r w h e n
.
S I D E 1 = n H
a n d S i d e 0 h e a d i s
s e L e c t e d ,
r e a d / w r i t e
i s
p o s s i b I e .
7. IffiiE-ETE
The signal
to control
read/write.
When ffRlETffilFE = "Lu
O
ana FEITffiRO-TIETI = rHtr, write
is possible.
When FF.ITE-TIIFE
= n H t r , r e a d i s p o s s i b l e .
8. fftrTE-5T"Itr-
When FFFFTIIM-
= tr-L tr (transient
fron high
to low) and
w r i t e
i s p o s s i b l e ,
t h e d i r e c t i o n
o f t h e w r i t e
c u r r e n t f l o w s
i n t o t h e r e a d / w r i t e
h e a d , c h a n g e s a n d t h e m a g n e t i c f l u x
c h a n g e i s r e c o r d e d o n t h e d i s k .
. , . / 3 6

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