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Hitachi MP-1802 Technical Manual page 23

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) e l
P i n
N o .
S i g n a l
D a t a D i r e c t i o n
M D B - A e
M D B - B
E x ' o l a n a t i o n
2 2
+ 5 v
<-
+ 5 V p o w e r s u p p l y
S T E P D I R E C T I O N
t
C o n t r o l s
h e a d m o v i n g
d i r e c t i o n
2 4
+ 5 v
<-
+ 5 V p o w e r s u p p l y
2 5
R CLK
C l o c k s i g .
t o d i v i d e
d a t a b i t
a n d c l o c k
b i t
f r o m R E A D D A T A
2 6
GND
+--)
GROUN D
2 7
S I N G L E W D
W r i t e
d a t a s i g .
t o
t h e d i s k ( S i n g l e
d e n s -
i t y )
2 8
GND
GRO UN D
2 g
D O U B L E D E N
r r L r t w h e n R / W o f
d o u b -
I e
d e n s i t y
m o d e
3 0
GND
€--------)
GROUN D
3 1
LI,I CLO CK
$ r l H z c l o c k
s i g .
J z
GND
<-----+
GRO UN D
3 3
M O T O R O N
M o f o r o p e r a t e s w h e n
r r H r l
3/,
GND
GROUN D
? (
3 6
GND
(------)
GROUN D
3 7
H E A D L O A D
F_-----)
W h e n f r H r r , h e a d l o a d s
s e L e c t e d
d r i - v e
3 8
H E A D L O A D T I M E
T u r n s
r r H r f w h e n h e a d
i s
e n g a g e d c o n d i t i o n
a f t e r :
h e a d l o a d
3 9
RAW READ
R e a d o u t d a t a s i g .
f r o m t h e d i s k
a f t e r
w a v e f o r m r e s t o r a t i o n
/,r0
GND
<-=+
G R O U N D
r r - - r f - U n u s e d t e r m i - n a l
. . . / 2 1

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Mp-3550