BASF 6106 - Connecting Configuration

3.1
.5.
LOGIC LEVELS AND TERMINATION
3.1.6.
CONNECTING
CONFIGURATION
Interface signals to
and from connector
J
1
have
the logic levels
represented by
Fig.
3-4.
All signal
inputs are terminated
by a
150 Q
resistor network
chip (position
4D)
.
This
chip can
be
removed for a
daisy chain
confi-
guration where
only the last
mini disk drive
needs
a termination network.
The BASF 6106
uses
SN 7438
or equivalent as
output
driver. As
input receiver SN
7404
or
equivalent is used. Fig.
3-5
shows
the re-
commended interface logic.
The BASF 6106 can
be connected
to
the host
system
in
different
conf
icurations
:
•
Single
Drive
Configuration
•
Multi
Drive
Configuration
3.1.6.1.
SINGLE
DRIVE CONFIGURATION
LOGIC
I
O.AV
LOW
0,0
V
LOGIC
*
5,25
V
P
HIGH
'
1*2,4
V
Only one drive is
connected to the host sys-
tem
as shown
in
Fig.
3-6.
HOST
SYSTEM
DC
MINI
*
DISK
DRIVESIGNAL
»-
SIGNAL
LINE
TERMINATOR
INSTALLED
FIGURE 3
-
4 .
INTERFACE LOGIC
LEVELS
FIGURE
3
-
6
. SINGLE
DRIVE
CONFIGURATION
5V
SN7438
MAX. 10
FEET
RIBBON OR
TWISTED
PAIR
i5
i>
!50.fL
TERMINATOR
SN7404
FIGURE
3
-
5
.
RECOMMENDED DRTVER
/
RECEIVER
CIRCUIT
3.1.6.2.
MULTIPLE DRIVE
"CONFIGURATION
In
multi
drive
configurations
more
than one
drive are
connected to the
host
system. In
a
multi
drive
configuration the
BASF
6106 can
be
connected
in
radial select or
daisy
chain
fash-
ion (see
Fig.
3-7
and
3-8).
In
a
radial
select
configuration all
mini
disk
drives need
terminator
networks and
in a
dai-
sy
chain
configuration only.
the
last
drive
needs a
terminator
chip.
3-4