BASF 6106 - Read Initiate Timing

2.
2. 8. 3.
READ CIRCUITS
The read
circuits recover data recorded
on
the
mini
disk by
a
write
operation.
A
read
oper-
ation is
initiated from the host system
by
activating
the following lines:
•
SELECT
/
selects the drive and loads the
head
if
no head load operation is
used.
The
signal WRITE
GATE/
must
be inactive
to
enable
the read
circuits.
Fig.
2-35 shows
the read
initiate
timing. The
read
circuits
shown
on Fig.
2
-
34
.
Comprises a
integrated
read
amplifier
system and
the necessary
ex-
ternal components.
• MOTOR
ON/
rotates the mini
disk.
•
HEAD LOAD/ loads the head if head load option
is used.
FROM
THFf
WRITE
J
CIRCUITS]
-i
R/W-
HEAD
READ/
WRITE
SELECT
=::>:>:
I
NP
IT
I NTE
RFACE :*>:
:g
j
T/
"FN. \
i
pv
::|
WRITE
GATE 1/
INTEGRATED
READ
CIRCUIT
MC3A70
1
WRTENA;01
FILTER
NETWORK
INTEGRATED
READ
CIRCUIT MC3A70
©
WRTENA
^
I/O ENA
WRT
INHIBIT
OUTPUT INTERFACE:::
s>
READ
DATA.
WRT
INHIBIT
-i>
FIGURE
2
-
34 . READ
CIRCUITS
(SIMPLIFIED)
IK'
-
POKER
MOTOR
0\'/
nuivi:
sli.ect/
(head
load,
ST1IIV
KRITL/
VALID READ DATA/
FIGURE
2
-
35
. READ
INITIATE
TIMING
24