Digital Equipment DSP2022-S User manual

DSP2022-S
SCSIDiskDrive
InstallationGuide
EK-2022S-IG-001
Digital Equipment Corporation

June, 1992
The information in this document is subject to change
without notice and should not be construed as a
commitment by Digital Equipment Corporation. Digital
Equipment Corporation assumes no responsibility for any
errors that may appear in this document.
Copyright © 1992 Digital Equipment Corporation
All Rights Reserved.
Printed in the U.S.A.

Contents
Scope of Information . ........... 1
Before You Begin . . . ........... 1
Locate the SCSI Connector ....... 2
Note Pin Status of the Vendor-Specific
Field . . . ................... 3
Note the Use of the SCSI Pin
Functions ................... 3
Locate Jumper Connector J1 . . . . . . 5
Learn the Jumper Functions ....... 6
Set the SCSI Device Address . . . . . . 7
Set the SCSI Address Remotely . . . . 8
Provide SCSI Bus Termination . . . . . 9
Obtain a Mounting Kit ........... 9
Locate the Drive Mounting Holes . . . . 9
Use the Drive Mounting Guidelines . . 11
Drive Specifications . ........... 12
iii

iv Contents
Figures
1 SCSI Connector ............... 2
2 Location of Jumper Connector J1 . . . 5
3 Side Mounting Holes . ........... 9
4 Bottom Mounting Holes .......... 10
Tables
1 Vendor-Specific Pin Options ....... 3
2 SCSI Pin Functions . ........... 4
3 Jumper Descriptions . ........... 6
4 Set SCSI Device Address ........ 7
5 Remote SCSI Address Determination . 8
6 Drive Specification Summary . . . . . . 12

DSP2022-S SCSI Disk Drive Installation Guide 1
Scope of Information
This guide supplies information needed to configure and
install your Model DSP2022-S 2.5-inch Small Computer
System Interface (SCSI) disk drive. The tasks you need
to perform are listed in order in the table of contents. The
specifications for the disk drive are found on the last page.
Before You Begin
Before removing the drive from its antistatic bag or
attempting installation, please read the following cautions:
ANTISTATIC CAUTION
As with any integrated circuit device, we highly
recommend that you use a properly grounded wrist
strap and antistatic pad when removing the disk drive
from its antistatic bag and handling it outside the bag.
HANDLING CAUTION
As with any delicate instrument, prevent shocks by
always placing it down gently. Avoid quick motions or
bumping.

2 DSP2022-S SCSI Disk Drive Installation Guide
Locate the SCSI Connector
Locate the SCSI 50-pin connector shown at the rear of
the drive in Figure 1 . This connector is used for cable
installation later. Note that the pins of the SCSI connector
are divided into two pin fields: one for the SCSI interface
signals and the other for the vendor-specific options. Learn
the use of these two pin fields in the following sections.
Figure 1 SCSI Connector
A7 A1
A8 A2
1
2
39
40
4 X 2 PIN FIELD
VENDOR SPECIFIC
OPTIONS
20 X 2 PIN FIELD
SCSI SIGNALS
SCSI 50 PIN CONNECTOR
MISSING PIN - KEY
CXO-3494A-TI_R
TWO MISSING PINS
SEPARATE PIN FIELD

DSP2022-S SCSI Disk Drive Installation Guide 3
Note Pin Status of the Vendor-Specific Field
The vendor-specific pin field consists of pins A1–A8. These
pins are used for testing at the factory, setting the SCSI ID
address remotely, and supply power to an external drive
activity light emitting diode (LED). The recommended pin
status is given in Table 1.
Table 1 Vendor-Specific Pin Options
Pin Function Status
A1 Reserved for
manufacturing Leave open
A2 Test UART transmit data Leave open
A3 +12 V for controller ROM Leave open
A4 Test UART receive data Leave open
A5 SCSI ID bit 0 See Table 5
A6 SCSI ID bit 1 See Table 5
A7 SCSI ID bit 2 See Table 5
A8 Drives external activity
LED. LED on indicates
the drive is processing
commands from the
host.
Active low, 24 mA
Note the Use of the SCSI Pin Functions
The 40 SCSI pins carry the SCSI signals, power, and
ground paths for the drive circuitry. Table 2 provides a list
of the pin functions. For a full explanation of the SCSI pin
functions, refer to the ANSI SCSI-2 Specification.

4 DSP2022-S SCSI Disk Drive Installation Guide
Table 2 SCSI Pin Functions
Pin Function Pin Function
01 +5V 02 +5V
03 Ground 04 Ground
05 Ground 06 DB0
07 Ground 08 DB1
09 Ground 10 DB2
11 Ground 12 DB3
13 Ground 14 DB4
15 Ground 16 DB5
17 Key (no pin) 18 DB6
19 Ground 20 DB7
21 Ground 22 DBP
23 Ground 24 TERMPWR
25 -ATTN 26 -BSY
27 Ground 28 -ACK
29 -RST 30 -MSG
31 Ground 32 -SEL
33 -I/O 34 -C/D
35 Ground 36 -REQ
37 GND Motor 38 GND Motor
39 +5V Motor 40 +5V Motor

DSP2022-S SCSI Disk Drive Installation Guide 5
Locate Jumper Connector J1
Locate jumper connector J1 on the electronic component
side of the drive, shown in Figure 2. Note that connector
J1 contains eight jumper pairs numbered 0 through 7. Your
drive comes with all jumpers in place.
Figure 2 Location of Jumper Connector J1
JUMPER PAIR 0
JUMPER PAIR 7
J1
CXO-3500A-MC_R

6 DSP2022-S SCSI Disk Drive Installation Guide
Learn the Jumper Functions
The jumper functions on the SCSI drive are described
in Table 3. These jumpers allow you to set the device
address, disable automatic spin-up, change the delay time
before spin-up, and enable drive power for an external SCSI
terminating resistor. The drive is shipped with all jumpers
installed.
Table 3 Jumper Descriptions
Jumper Function Jumper Status
0 Device Address bit 0 See Table 4
1 Device Address bit 1 See Table 4
2 Device Address bit 2 See Table 4
3 Enables automatic spin up
when power is applied IN
Disables automatic spin up
when power is applied OUT
4 Disables spin-up delay timer. IN
Enables spin-up delay timer
of 10 seconds times the SCSI
ID. The delay is valid only
when automatic spin up is
enabled.
OUT
5 Reserved IN
6 Prevents the manufacturing
test from being initiated if pin
A1 is grounded.
OUT
7 Enables drive power to an
external SCSI bus terminator IN
Disables drive power to an
external SCSI bus terminator OUT

DSP2022-S SCSI Disk Drive Installation Guide 7
Set the SCSI Device Address
Jumpers 0, 1, and 2 are used to set the SCSI device
address. Table 4 shows the jumper IN or OUT status for
setting the SCSI device address. IN means jumpers are in
place and OUT means jumper are removed. Save unused
jumpers.
Table 4 Set SCSI Device Address
Jumper
2Jumper 1Jumper 0 Device Address
IN IN IN 0 (see Table 5)
IN IN OUT 1
IN OUT IN 2
IN OUT OUT 3
OUT IN IN 4
OUT IN OUT 5
OUT OUT IN 6
OUT OUT OUT 7

8 DSP2022-S SCSI Disk Drive Installation Guide
Set the SCSI Address Remotely
When jumpers 0, 1, and 2 are left in place for a device
address of 0, the drive will use the remote active encoded
SCSI device address (ID) number on the vendor-specific
connector at the rear of the drive. If there is not an active
ID address on pins A5–A7, the drive will assume the ID is
0. Refer to Table 5 for the pin electrical states.
Table 5 Remote SCSI Address Determination
Pin
A7 Pin A6 Pin A5 Device Address
1110
1101
1012
1003
0114
0105
0016
0007
NOTE
Table 5 refers to Transistor-Transitor Logic (TTL)
voltage levels. TTL high = 1, and TTL low = 0.

DSP2022-S SCSI Disk Drive Installation Guide 9
Provide SCSI Bus Termination
The SCSI bus only needs termination resistors at the
beginning and end of the bus. Since this drive does not
have a SCSI bus terminating resistor on it, bus terminating
resistors must be located external to the drive. The drive
does provide power for an external terminating resistor over
SCSI connector pin 24. Leave jumper 7 in place to enable
the drive terminator power supply. Remove jumper 7 if you
don’t need SCSI bus termination.
Obtain a Mounting Kit
Due to the large number of possible installation cabinets
and slot sizes, your drive does not come with an installation
kit of brackets, screws, and cables. You must obtain the
parts needed for your particular installation from your
distributor or purchasing source.
Locate the Drive Mounting Holes
Two holes are provided on each side of the drive for side
mounting. Four mounting holes are provided on the bottom
surface for bottom mounting. These mounting holes are
shown in Figures 3 and 4.
Figure 3 Side Mounting Holes
M3 x 0.5
BOTH SIDES
.740 in
18.80 mm
.244 in
6.20 mm
1.500 in
38.10 mm
1.375 in
34.93 mm
CXO-3496A-MC_R
MOUNTING HOLE (2)

10 DSP2022-S SCSI Disk Drive Installation Guide
Figure 4 Bottom Mounting Holes
1.500 in
38.10 mm
2.420 in
61.47 mm
.165 in
4.19 mm
4.000 in
101.60 mm
M3 x 0.05
1.375 in
34.93 mm
CXO-3495A-MC_R
MOUNTING HOLE SCREW (4)

DSP2022-S SCSI Disk Drive Installation Guide 11
Use the Drive Mounting Guidelines
Use this list of drive mounting guidelines to prevent
mounting problems.
• The drive may be mounted in any orientation.
• Mounting screws should not penetrate the mounting
holes beyond the depths given in this list.
• Mounting screws are M3 X 0.5 metric screws (3mm
diameter and 0.5 thread pitch).
• The recommended screw depth penetration of the
bottom mounting holes is 0.381 centimeters (0.15
inches).
• The recommended screw depth penetration of the side
mounting holes is 0.254 centimeters (0.1 inches).

12 DSP2022-S SCSI Disk Drive Installation Guide
Drive Specifications
The performance and environmental specifications for your
disk drive are listed in Table 6.
Table 6 Drive Specification Summary
Formatted Storage 220,000,000 bytes
Average Seek Time Less than 10 milliseconds
Typical spin up time Less than 12.5 seconds
Disk rotation speed 5400 RPM
Bytes per block 512
Height 0.75 in. (19.0 mm)
Length 4.0 in. (101.6 mm)
Width 2.75 in. (69.8 mm)
Weight 7.3 oz. (.20 kg.)
Voltage & regulation +5VDC +/- 5%
Active mode power Less than 5 watts
Operating Altitude -200 to + 10,000 feet
-61 to + 3,048 meters
Operating Temperature +40 to +131 degrees F
+5 to +55 degrees C