BASF 6106 - Functional Description

SECTION
2
THEORY
OF
OPERATION
.
i
.
FUNCTIONAL
DESCRIPTION
Functional
Circuits:
The
BASF
6106
comprises
the
following
mecha-
nism
functional
circuits
(see
Fig.
2
-
1).
Mechanism:
•
Drive
Mechanism
•
Spindle
and
Front
Door
Mechanism
•
Positioning
Mechanism
•
Head
Load
Mechanism
•
Interface
•
Drive
Motor
Control
•
HEAD
LOAD-,.
DOOR
LOCK-
and
ACTIVITY
LED-
Driver
•
Track
Zero
Detector
•
Write
Protect
Detector
•
Index
/
Ready
Detector
•
Read
/
Write
Circuits
•
DC-
Control
and
Power
On
Reset
Logic
SELECT
l/
SELECT
2/
SELECT
3/
WRITE
DATA/
WRITE
GATE/
DIRECTION
IN/
,
IN
USE/
(optional)
HEAD
LOAD/.
MOTOR
ON/
1/0
ENA
WRJTE
1NK1EIT
Lt
READ /
WRITE
CIRCUITS
WRT
CURRENT
or
RD
PLAYBACK
ERASE
CURRENT
DRIVE
MOTOR
CONTROL
VRT-ERASE
CURRENT
5V DC
«
12V DC
DC- I
CONTROL I?
AND
r
P
R#T
0N
1
DC-MDTOR
INDEX/
READY
1>ETECT0R
INDEX
—
r
SPEED
DC-
CONTROL
|PWR
ON RESF
T
AND
"*"
WRITE
PROTECT
DETECTOR
:
READ
DATA/
TRACK
00/
INDEX/
READY/
DISK
CHANGE
/
(optional)
WRITE
PROTECT/
FIGURE
2
-
1 .
BLOCK
DIAGRAM
BASF
6106