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Commodore 8250LP - VIII. INTERFACE; Connector Requirements (P1 & P2); Recommended Write Operation Interface

Commodore 8250LP
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B-3.
8-4.
Connector
Requirements
Housing
Contacts
PCB
Header
Honda
HKP-12F02
Honda
HK?-F303
Honda
FFC-12TLBW1B#3
The
w~ITE opera~lon
utilizes
both
read/write
coils
sequentially,
where
each
~ritten
bit
is
directed
to
alternate
read/write
coil,
creating
a
change
in
the
direction
of
current
flow
through
the
read/write
head.
The
required
current
is
6.3
±
.2
ma
peak
to
peak,
or
3.15
±
.2
ma
base
to
peak
on
all
tracks.
It
is
recom-
mended
that
the
write
current
transitions
are
within
0.5%
from
leading
edge
to
leading
edge.
Proper
write
damping
must
be
considered
during
design
for
write
transitions.
Note:
The
head
must
be
loaded
for
proper
write
operation.
4-2SA720
or
Eq.
4-MA162
or
Eq.
P2-9
·
~
i
>>---3
tZ2k
62k~
I
~ Sid~O
I
~
HEAD
P2-5
..,
)!
I
>>---J
-WRITE
DATA
1
J-
'f
I
pt
~
2k
l~
I
-----:::~\'\.
150
22k
6?l.-
j""'-'
Side
1
2~~
332
~
~
332
,-.-!-_1_~_
....
I
__
---,L~,-··
..
pZ)10i.
?
HS.l.O
1:;
I
I
l~
7i
7.
AA
I?
I
WRITE
OA.Tf>..
J
_______
~~~.A-1_~----~
SV
Oi----
.... ,
--.....,V
l
1
P2-i
T~
0
?2-8
~
22k
CONSTANT
r
I
C~R~E~~
SOURCE
[0
;>
-
3.J.
_
0.1
rnA
iii
I
!
I
Lw
1
WRITE
GATE
6~1
~n-"I,I,--l
L..;L-J
6.30
I
I
E:X?
.....
NOED
WRITE
GA7E
O
II
I~:
-~I-----"
I
l~
I "
I
----------1-5~1
M
i
Zt
~+br----
...
,
-{:i~K---+--':::i
12VA
-S[OE1
SELECT
----------~I
\,I.\tr-----V·,~~--,
I'
470
l.Si<
I
12i
13
1 ; 0.01.::
m
i77
1TT"
Fig.
3 A
RECO~~fE
. .'mED
I~TEP..FACE
FOR
\~~ITE
OPE.RATIO."!
(8)

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