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Drive Interface - Sharp MZ1F10 Service Manual

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M Z-5600A
4. DRIVE INTERFACE
4-1. Drive Interface Signals
(1) Control Signal Interface Connector (CN1)
Pin No.
signals
Pin No.
Signals
2 · ·
·
REDUCED WRITE CURRENT
I
HEAD SELECT 2
3
1
GND
GND
GND
GND
4
HEAD SELECT2
2
3
6
8
10
..
..
..
12
.
..
.
.
.
14
.
..
.
..
16
..
.
..
.
18
.
...
.
.
20
..
..
.
.
22
.
. ..
..
24
.
.
..
.
.
26 ····
··
28 ...
...
30
.
.
.
...
32
.
.
..
.
.
84
...
...
WRITE GATE
SEEK COMPLETE
TRACKO
WRITE FAULT
HEAD SELECT 2°
RESERVED
HEAD SELECT 2
1
INDEX
READY
STEP
DRIVE SELECT 1
DRIVE SELECT 2
DRIVE SELECT 3
DRIVE SELECT 4
DIRECT ION IN
5
7
9
GND
11
·
··
···
GND
13
··
·
··
· GND
15
·
··
··
· GND
17
··
···
·
GND
19
·····
· GND
21
··
·
·
·
· GND
23
·
····
·
GND
25
·
·
··
·· GND
?:l ·
·
·
···
GND
29 ·
·
·
···
GND
81
·
··
··
· GND
33
·
·
·
··
· GND
1
33 31
2}
'Zl - - - - - - - • - - - - - -8
~
CN1 connector
designated pin No.
o o o o
--------------0
o
I
0 0 0 0 - - - - - - - - - - - - - - 0 0 .
84
32 30 28
4 2
(2) Data Signal Interface Connector (CN2)
Pin No.
Signals
Pin No
.
Signals
2
GND
1 .
..
DRIVE SELECTED
4
GND
3
RESERVED
6
GND
5
SPARE
8
GND
7
RESERVED
10
......
SPARE
9
SPARE
12
..
.... GND
11
......
GND
14 ... -MFM WRITE DATA
13 ..
.
+MFM WRITE DATA
16
..
..
.. GND
15 .. · .. · GND
18
..
. -MFM READ DATA
17 .
..
+MFM READ DATA
20 ..
..
.. GND
CN2 connector
designated pin No
.
t
19 ...
.
.. GND
19 17 15 - - - - - - - 3
ODD
--------o
ODD - - - - - - - - 0
20 1816 - - - - - - - 4 2
4-2. Drive Interface Driver/Receiver
( 1) Control Signals
All the signals of the CN1 connector and drive selected
signals of the CN2 connector are like the
following.
I
(driver)
NS7438 or
compatibles
I
+SV
I
(receiver)
I
t - - - 6m m a x - - ,
I
I
(2) Data Signals
(driver)
AM26LS31 or
:
compatibles
I
flat cable or
twisted pair cable
impedance
:
100±10.n
-
I
6m max---'
I
flat cable or
twisted pair cable
impedance
:
100
±
10.n
4-3. Drive Interface Timing
(1) Seek Operation (Normal Mode Seek)
(receiver)
AM26L32 or
compatibles
DR
I
VE SELECT
DIRECTION IN
S'fEP
~
I--
IOOu trp
--~X
~
--1
-
eo .. '"
--1 1-aoo. ,,
~----~
:-;S
E
""
EJ[ ;;;-OCAI=P=-:L-=:ET=E
~
IC,.
1
n>
--i
-O•JoiiN
--:REA_D_G-AT-E
~In>
(2) Seek Operation (Buffer Mode Seek)
DRIVE
SELECT
--l
1--IOOu trp
DIRE CTION IN
=:J~;----------,-'X'----
_
--~;.;__ ...... Ouo
!n.
- l
~
lOO•
In>
UlJ-
~
.....,
~--ta-t,.poo~
t--
14u. ' "
S
EU C<»>PLETE
_ _ _ _ ....J
-~·~·~Joi~IN~~L------
- l
t-O•MINI--
-1
l-IDO•
In>
I
READ GATE.__ _ _ _ _
-
8
-
-
----

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