Conner Peripherals, Inc.
CP3184 Intelligent Disk Drive
Product Manual
Revision I.3
August, 1990
3081 Zanker Road
San Jose, CA 95134-2128
(408) 456-4500
Japan (81) 3-597-8321 Europe (49) 89-811-2097
Notice
Conner Peripherals makes no warranty of any kind
with regard to this material, including, but not
limited to, the implied warranties of
merchantability and fitness for a particular
purpose. Conner Peripherals shall not be liable
for errors contained herein or for incidental
consequential damages in connection with the
furnishing, performance, or use of this material.
Conner Peripherals, Inc. reserves the right to
change, without notification, the specifications
contained in this manual.
Copyright Conner Peripherals, Inc. No part of
this publication may be reproduced or translated
into any language in any form without the written
permission of Conner Peripherals, Inc.
IBM, PC/AT and PC/XT are registered trademarks of
International Business Machines Corporation.
Table of Contents
1.0 Scope of Manual
2.0 Key Features
3.0 Specification Summary
3.1 Capacity
3.2 Physical Configuration
3.3 Performance
3.4 Read/Write
3.5 Power Requirements (Typical)
3.7 Physical Characteristics
4.0 Environmental Characteristics
4.1 Temperature
4.2 Humidity
4.3 Altitude
4.4 Reliability and Maintenance
4.5 Shock and Vibration
4.6 Magnetic Field
4.7 Acoustic Noise
4.8 Safety Standards
5.0 Functional Descriptions
5.1 Read/Write and Control Electronics
5.2 Drive Mechanism
5.3 Air Filtration System
5.4 Head Positioning Mechanism
5.5 Read/Write Heads and Disks
5.6 Error Correction
5.7 Customer Options
6.0 Electrical Interface
6.1 Power Connector
6.2 Cabling
6.3 Diagnostic Routines
7.0 Recommended Mounting Configuration
7.1 Mechanically Isolated Mounting Points
8.0 Interface Description
8.1 Physical Description
8.2 Connector
9.0 Electrical Description
9.1 Signal Levels
9.2 Signal Conventions
9.3 Pin Descriptions
10.0 Host Address Decoding
1.0 Scope of Manual
This specification describes the key features,
specification summary, physical characteristics,
environmental characteristics, functional
description, electrical interface, recommended
mounting configuration, interface description,
electrical description, timing requirements, host
address decoding, register description, command
description, operations description and error
reporting for the Conner Peripherals model CP3184.
2.0 Key Features
The CP3184 is a high performance 3.5 inch 84.3
megabyte (formatted) disk drive designed to
operate on an IBMr PC AT or equivalent in either
translate or native modes featuring 1:1
interleave. Because the drive contains the Task
File within its control logic, it requires a
simplified adapter board to operate.
Key Features include:
o 1:1 Interleave
o 32K Buffer
o Read Look Ahead Capability
o AC Hysterisis on Interface
o 7 Byte ECC on Data Block
o 2 Byte CRC on Header Block
o High performance rotary voice coil actuator
with
embedded servo system.
o Two of seven run length limited code.
o Internal air filtration system
o Automatic actuator latch against inner stop
upon power down.
o Microprocessor controlled diagnostic
routines that are automatically executed at
start up.
o Automatic error correction and retries.
o Block size 512 bytes.
o Emulates Task File and supports additional
commands.
o Up to two drives may be daisy chained on
this interface.
3.0 Specification Summary
3.1 Capacity
84Mbyte formatted
3.2 Physical Configuration
Actuator Type Rotary Voice-coil
Number of Disks 3
Data surfaces 6
Data Heads 6
Servo Embedded
Tracks per Surface 832
Track Density (TPI) 1150
Formatted Track Cap. (Bytes) 16,896
Bytes per Block 512
Blocks per Drive 164,736
Blocks per Track 33
3.3 Performance
Seek Times Trk. to Trk 8.0ms*
Aver. 25.0**
Max. 45.0
Rotational Speed 3575 RPM
Data Transfer Rate 1.25Mbytes/Sec
Start Time (Power Up) Typical 15 sec.
Max. 20 sec.
Stop Time (Power Down) Typical 15 sec.
Max. 20 sec.
Interleave 1:1
Buffer Size 32K
* The timing is measured through the
interface with the drive operating at
nominal DC input voltages. The timing
also makes the following assumptions:
o BIOS and PC system hardware
dependency have been subtracted from
timing measurements.
o The drive is operated using its
native drive parameters.
** The average seek time is determined by
averaging the seek time for a minimum of
1000 seeks of random length over the
surface of the disk.
3.4 Read/Write
Interface Task File
Recording Method 2 of 7 RLL
Recording Density 24,437 bpi
Flux Density 16,291 rpi
3.5 Power Requirements (typical)
+12VDC +5VDC Power
Read/Write 350ma 300ma 5.7 W
Seek 260ma 180ma 4.0 W
Ready 175ma 160ma 2.9 W
Spin-up 1800ma 180ma N/A
Maximum noise allowed (DC to 1 MHZ, with
equivalent resistive load): +12V DC: 1%,
+5V DC: 2%.
Read/Write mode occurs when data is being read
from or written to the disk.
Seek Mode occurs while the actuator is in motion.
Ready Mode occurs when the drive is not reading,
writing, or seeking. The motor is up to speed and
DRIVE READY condition exists. Actuator is residing
on last accessed track.
Spin up Mode current draw is for 7 seconds max.
3.6 Physical Characteristics
Dim 1.62" x 4.00" x 5.75" (With shock frame)
Weight 1.8 Lbs
4.0 Environmental Characteristics
4.1 Temperature
Operating 5 deg. C to 55 deg. C
Non-operating -40 deg. C to 60 deg. C
Thermal Gradient 20 deg. C per hour (Max)
4.2 Humidity
Operating 8% to 80% Non-condensing
Non-operating 8% to 80% Non-condensing
Max. Wet Bulb 26 deg. C
4.3 Altitude (relative to sea level)
Operating -200 to 10,000 Feet
Non-operating 40,000 feet
4.4 Reliability and Maintenance
MTBF 50,000 hours (POH)*
MTTR 10 Min. Typical
Maint. None
*population minimum of 100 units
4.5 Shock
Operating 5 Gs
Non-operating 50 Gs
4.6 Magnetic Field
The disk drive will meet its specified performance
while operating in the presence of an externally
produced magnetic field under the following
conditions:
0-700Khz 6 gauss Max.
700Khz to 1.5Mhz 1 gauss Max.
4.7 Acoustic Noise
The sound pressure level will not exceed 40 dBA at
a distance of 1 meter from the drive.
4.8 Safety Standards
Conner Peripherals disk drives are designed to
comply with relevant product safety standards such
as:
o UL 478, 5th edition, Standard for Safety of
Information Processing and Business
Equipment, and
UL 1950, Standard for Safety of Information
Technology Equipment
o CSA 22.2 #154, Data Processing Equipment
and
CSA 22.2 #220, Information Processing and
Business Equipment.
o IEC 435 Safety Requirements for Data
Processing Equipment,
IEC 380, Safety of Electrically Energized
Office Machines, and
IEC 950, Safety of Information Technology
Equipment Including Electrical Business
Equipment.
o VDE 0805 Equivalent to IEC 435,
VDE 0805 TIEL 100, Equivalent to IEC 950,
and
VDE 0806, Equivalent to IEC 380.
5.0 Functional Description
The CP3184 contains all necessary mechanical and
electronic parts to interpret control signals,
position the recording heads over the desired
track, read and write data, and provide a
contaminant free environment for the heads and
disks.
5.1 Read/Write and Control Electronics
One integrated circuit is mounted within the
sealed enclosure in close proximity to the
read/write heads. Its function is to provide one
of eight head selections, read preamplification,
and write drive circuitry.
The single microprocessor controlled circuit card
provides the remaining electronic functions which
include:
o Read/Write Circuitry
o Rotary Actuator Control
o Interface Control
o Spin Speed Control
o Dynamic Braking
At power down the heads are automatically
retracted to the inner diameter of the disk and
are latched and parked on a landing zone that is
inside the data tracks.
5.2 Drive Mechanism
A brushless DC direct drive motor rotates the
spindle at 3575 RPM. The motor/spindle assembly
is dynamically balanced to provide minimal
mechanical runout to the disks. A dynamic brake
is used to provide a fast stop to the spindle
motor and return the heads to the landing zone
when power is removed.
5.3 Air Filtration System
The head-disk assembly is a sealed enclosure with
an integral 0.3 micron filter which maintains a
clean environment for the heads and disks.
5.4 Head Positioning Mechanism
The six read/write heads are supported by a
mechanism coupled to the voice coil actuator.
5.5 Read/Write Heads and Disks
Data is recorded on four 95mm diameter disks
through eight 3370 type heads.
5.6 Error Correction
The CP3184 performs internal error correction.
The error correction polynomial is capable of
correcting one error burst with a maximum of 8
bits per 512 byte block. The following polynomial
is used:
ECC: X56+X52+X50+X43+X41+X34+X30+X26+X8+1
CRC: X16+X12+X5+1
5.7 Customer Options
There are four jumper options available for
configuration,
-HSP, -C/D, -DSP, and -ACT.
-HSP, when jumpered connects a ground to -HOST
SLV/ACT signal (pin 39 of J2) on the interface for
those systems that require the slave drive to
provide -SLAVE PRESENT signal from the slave drive
to a two drive. system.
-C/D is the address jumper. When jumpered, the
master or C drive is selected.
-DSP, when jumpered, indicates to the drive that a
slave is present. In a two drive system, this
jumper option must be installed in the master, or
C drive.
The last jumper, -ACT, connects the active signal
to the -HOST SLV/ACT signal (pin 39 of J2) on the
interface. This signal provides the capability to
drive an external LED. An external current
limiting resistor is required. There is another
way to connect the drive LED. J4, pins 1 and 2,
provide both an open collector drive signal and a
current limiting resistor connected on the other
end to +5V.
Note 1: In a two drive system, it is possible
to drive one LED with both drives. An
external current limiting resistor is
required. The -ACT and HSP signals both
use pin 39 of J2, -HOST SLV/ACT. They
are therefore mutually exclusive.
Note 2: If the model CP3184 is operating as
a slave drive connected to a Master
drive that requires that the signal,
-DRIVE SLAVE PRESENT be supplied from
the slave drive via the interface signal
-HOST SLV/ACT, then this jumper must be
installed. If this jumper is installed,
the -ACT jumper must not be installed
because they both use pin 39 of J2.
6.0 Electrical Interface
6.1 Power Connector
The CP3184 has a 4 pin DC power connector (J3)
mounted on the PCB. For the location and pin
assignments for J3 see figure 1. The recommended
mating connector is AMP part number 1-480424-0
utilizing AMP pins part number 350078-4 or
equivalent.
6.2 Cabling
Connect the power cable to J3. Connect the Task
File interface cable to J2.
6.3 Diagnostic Routines
The microprocessor performs diagnostics upon
application of power. If an error is detected the
CP3184 will not come ready.
7.0 Recommended Mounting Configuration
The CP3184 drive is designed to be used in
applications where the unit may experience shock
and vibrations at greater levels than larger and
heavier disk drives.
The features which allow greater shock tolerance
are the use of rugged media and shock mounts. To
take full advantage of the shock mounts, it is
necessary to provide a minimum of 0.1 inch
clearance on both the top and sides of the drive.
This clearance allows for movement of the drive
during acceleration. The drive may be mounted in
any attitude.
7.1 Mechanically Isolated Mounting Points
Ten base mounting points are provided to the
customer. Each mounting point is mechanically
isolated from the head/disk assembly. The drive
is mounted using 6-32 screws; 1/8" max. insertion
for the sides, and 1/4" max. insertion for the
bottom. The system integrator should allow
ventilation to the drive to ensure reliable drive
operation over the operating temperature range.
8.0 Interface Description
8.1 Physical Description
The CP3184 user interface is a 40 conductor cable
with Molex P/N 15-47-3401 female header or
equivalent. The interface allows up to two drives
to be daisy chained together. The maximum cable
length is two feet.
8.2 Connector
The CP3184 connector is a 40 conductor connector
which consists of two rows of 20 male pins on 100
mil centers. The header part number is Molex P/N
7723-40A587, or equivalent.
9.0 Electrical Description
9.1 Signal Levels
All signal levels are TTL compatible. A logic "1"
is > 2.0 Volts. A logic "0" is from 0.00 Volts to
.70 Volts. The drive capability of each of the
inbound signals is described in section 9.3.
9.2 Signal Conventions
The interface between the drive adapter and the
drive is called the Host Interface. The set of
registers in the I/O space of the Host is known as
the Task File.
All signals on the Host Interface shall have the
prefix HOST. All negatively active signals shall
be further prefixed with a "-" designation. All
positive active signals shall be prefixed with a
"+" designation. Signals whose source are the
Host, are said to be "outbound" and those whose
source is the drive, are said to be "inbound".
9.3 Pin Descriptions
The following describes the pins on the Task
File Interface (J1).
Signal Name Dir Pin Description
-HOST RESET O 01 Reset signal from the
Host system which is
active low.
GND O 02 Ground between the drive
and the Host.
+HOST DATA 0-15 I/O 03-18 16 bit bi-directional data bus between
the host and the drive. The lower
8bits, HD0-HD7, are used for
register & ECC access. All 16 bits
are used for data transfers.
These are tri-state lines with 24
mA drive capability.
GND O 19 Ground between the drive and the Host.
KEY N/C 20 An unused pin clipped on the drive and
plugged on the cable. Used to guarantee
correct orientation of the cable.
RESERVED N/C 21 A pin reserved for future use.
GND O 22 Ground between the drive and the host.
-HOST IOW O 23 Write strobe, the rising edge of
which clocks data from the host data bus,
HD0 through HD15, into a register on
the drive.
GND O 24 Ground between drive and host.
-HOST IOR O 25 Read strobe, which when low enables data
from a register on the drive onto the host
data bus, HD0-HD15. The rising edge
of -HOST IOR latches data from the drive
at the host.
GND O 26 Ground between drive and host.
RESERVED O 27,29 Not Connected.
+HOST ALE O 28 Not Connected.
GND O 30 Ground between drive and host.
+HOST IRQ14 I 31 Interrupt to the Host system, enabled only
when the drive is selected, and the host
activates the -IEN bit in the Digital
Output register. When the -IEN bit is
inactive, or the drive is not selected,
this output in a high impedance state
regardless of the state of the IRQ bit.
The interrupt is set when the IRQ bit is
set by the drive CPU. IRQ is reset to zero
by a Host read of the Status register or a
write to the command register. This signal
is a tri-state line with 8 ma drive capacity.
-HOST IO16 I 32 Indication to the Host system that the 16
bit data register has been addressed and that
the drive is prepared to send or receive a 16
bit data word. This line is tri-stateline with
24 mA drive capacity.
-HOST PDIAG I 34 Passed diagnostic. Output by the drive if it
is in the slave mode (-C/D not installed) .
Input to the drive if it is in the master
mode (-C/D installed). This low true signal
indicates to a master that the slave has
passed its internal diagnostic command.
This line is a tri state line with 24 mA
drive capability.
+HOST A0,A1,A2 O 35,33,36 Bit binary coded address used to select the
individual registers in the task file.
-HOST CS0 O 37 Chip select decoded from the host address bus.
Used to select some of the Host accessible
registers.
-HOST CS1 O 38 Chip select decoded from the Host address bus.
Used to select three of the registers in
the Task File.
-HOST SLV/ACT I 39 Signal from the drive used either to drive an
active LED whenever the disk is being
accessed or as an indication of a second
drive present. (See the Customer Options
section for further information.) When
jumpered as -ACTIVE, this signal is active
low when the drive is busy and has a drive
capability of 20 ma. When jumpered as -SLAVE
PRESENT signal, it is an indication of the
presence of a second drive when low. In this
state, it has a drive capability of 10 mA open
drain.
GND O 40 Ground between drive and host.