Adaptec AHA-1540 User Manual - Page 3

Section

Three

Installation

3.2.1

SCSI

Jumper

Configuration

Jumper

set

J1,

pin

pairs

4,

5

and

6,

defines

the

SCSI

address.

The

SCSI

address

consists

of

pin

pairs

4,

5,

and

6

in

the

large

block

of

jumper

pins

located

in

the

upper

right

hand

corner

of

the

PCB.

Pin

pair

1

is

the

left

most

pair

of

pins.

The

SCSI

address

is

selected

according

to

the

following

table.

The

default

address

is

7.

SCSI

Address

Jumpers

Pin

4

Pair

5

6

SCSI

Address

X

X

X

0

-

X

X

1

X

-

X

2

-

-

X

3

X

X

-

4

-

X

-

5

X

-

-

6

-

-

-

7

X

=

Jumper

Installed

3.2.2

SCSI

Parity

J1

4

5

6

0 0 0 0 0

0

0 0 0 0

0

0 0 0 0 0 0 0

0 0

0 0

L

pin

pair

1

Jumper

set

J1,

pin

pair

3,

is

the

parity

enable/disable

jumper.

The

SCSI

parity

jumper,

pin

pair

3

is

located

in

the

large

block

of

jumper

pins

located

in

the

upper

right

hand

corner

of

the

PCB.

Pin

pair

1

is

the

left

most

pair

of

pins.

The

SCSI

parity

checking

is

disabled

if

this

jumper

is

installed.

The

default

is

parity

checking

enabled.

3.2.3

SCSI

Terminators

RN6

and

RN7

are

the

SCSI

terminators.

If

the

AHA-1540

is

not

the

first

or

the

last

SCSI

device

in

a

string

of

SCSI

devices,

or

if

in

-line

terminators

are

used,

then

both

of

these

resistor

networks

must

be

removed.

Default

is

terminators

installed.

AHA-1540

3

-

2

adaptec

Adaptec AHA-1540 User Manual - Page 3

enable/disable

Page 3 highlights