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CONNER PERIPHERALS
CP2064
Intelligent Disk Drive
Product Manual
Revision I
October 1990
3081 Zanker Rd.
San Jose, Ca. (408) 456-4500
Japan (81) 3-597-8321 Europe (49) 89-811-2097
NOTICE
Conner Peripherals make 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 contaioned in this manual.
Copyright Conner Peripherals, Inc. No part of this
publication may be reproduced or translated into any
language in any form without written permissiom 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)
3.6 Physical Characteristics
4.0 Environmental Characteristics
4.1 Temperature
4.2 Humidity
4.3 Altitude (relative to sea level)
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 Description
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 Interface Connector
6.1 Diagnostic Routines
7.0 Recommended Mounting Configuration
8.0 Electrical Description
8.1 Signal Levels
8.2 Pin Descriptions
1.0 Introduction
The CP2064 is a high performance 2.5 inch low-profile (.69")
64.0 megabyte (formatted) disk drives with average seek time
not to exceed 19ms which is designed to operate on an
IBM PC/XT & PC/AT or equivalent computer. The drives
feature a low 5V power requirement and high shock resistance,
enabling battery operation in portable environments.
In order for the CP2064 to communicate with the host system,
it is necessary for the system to contain a IDE interface.
(The IDE interface contains the address decode logic.)
This interface may be either built into the system, or may
be placed on a 8 bit or 16 bit I/O card, which can be placed
into any open I/O slot within a IBM XT or AT type system.
1.1 Scope
This specification describes the key features, specification
summary, physical characteristics, environmental characteristics,
functional description, electrical interface, recommended
mounting configuration, and error reporting for the Conner
Peripherals model CP2064.
2.0 Key Features
o 2.5" Form factor
o Single 5 Volt supply
o Low power requirements
o 7.0 oz
o High performance rotary voice coil actuator with
embedded servo system.
o Single connector for power & interface
o Run length limited code (1/7 or 2/7)
o High shock resistance
o Internal air filtration system
o Sealed HDA
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 PC AT interface
o 1:1 Interleave
o Look Ahead Read Capability
o 32K Buffer
o Master/Slave option
3.0 Specification Summary
3.1 Capacity
64.0 Mbytes Formatted
3.2 Physical Configuration
Actuator Type Rotory Voice-coil
Number of Disks 2
Number of Surfaces 4
Number of Heads 4
Servo Embedded
Tracks per Surface 823
Track Density 2100 TPI
Formatted Track (Bytes) 19,456
Bytes per Block 512
Blocks per Drive 125,096
Sectors per Track 38
3.3 Performance
Seek Times
Track to Track 5.0 ms
Average 19.0 ms
Maximum 40.0
Rotation Speed 3486 RPM
Data Transfer Rate 1.5 Mbytes /sec
Start Time
Typical 10 sec
Maximum 20 sec
Stop Time
Typical 3.0 sec
Maximum 5.0 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 assumes that:
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. These numbers
assume spin recovery is not invoked. If spin recovery
is invoked, the maximum time could be up to 40 seconds.
Briefly removing power can lead to spin recovery being
invoked.
3.4 Read/Write
Interface AT
Recording Method 2/7 RLL
Recording Density 39,222
Flux Density 29,416
3.5 Power Requirements: +5V DC
R/W 560 ma 3.0 W
Seek 560 ma 3.0 W
Idle 260 ma 1.5 W
Standby 80 ma .50 W
Sleep 60 ma .40 W
Spin-up 1110 ma N/A
Read/Write/Seek Mode: occurs when data is being read
from or written to the disk, or when the actuator mechanism
is in motion.
Idle 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.
Standby Mode: occurs when the motor is stopped and actuator
is parked. STANDBY MODE will occur after a programmable
time-out since last host access occurs. The drive will leave
STANDBY MODE upon receipt of a command which requires disk
access or upon receipt of a spin up command.
Sleep Mode: occurs when the drive is issued a command of E6h.
The drive motor is stopped and all electronics are put into
a reduced current mode. The 12 VCC power produced by U2 is
cut off, thus eliminating power to the pre-amp IC. A host
reset is required to exit sleep mode.
Maximum noise allowed (DC to 1 MHZ, with equivalent
resistive load): +5V DC: 2%.
4.0 Physical Characteristics
.75" x 2.75" x 4.00"
5.0 Environmental Characteristics
Temperature
Operating 5 deg. C to 55 deg. C
Non-operating -40 deg.C to 60 deg. C
Thermal Gradient 20 deg. C per Hr. Max
Humidity
Operating 8% to 80% Non-condensing
Non-operating 8% to 80% Non-condensing
Max Wet Bulb 26 deg. C/hour
Altitude (relative to sea level)
Operating -200 to 10,000 Ft.
Non-operating 40,000 Ft.
5.1 Reliability and Maintenance
MTBF 100,000 Hours (POH)
MTTR 10 min typical
Maint. None
5.2 Shock
Non-operating 100 Gs
Operating 10 Gs
5.3 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:
Frequency Field Intensity
0 to 700 Khz 6 gauss Max
700Khz to 1.5 Mhz 1 gauss Max
5.4 Acoustic Sound Emission
Power - TBD
Pressure - 34 dBa at 1 meter
5.5 Safety Standards
The CP2064 disk drive is 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.
6.0 Functional Description
The CP2034 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.
6.1 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 two head selection, read preamplification, and write data
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
o Power Management
At power down or the start of STANDBY MODE 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.
6.2 Drive Mechanism
A brushless DC direct drive motor rotates the spindle at 3486 RPM.
The motor/spindle assembly is balanced to provide minimal mechanical
runout to the disks and to reduce vibration of the HDA. A dynamic brake
is used to provide a fast stop to the spindle motor when power is removed,
or upon initiation of STANDBY MODE.
6.3 Air Filtration System
Within the sealed enclosure, a .3 micron filter provides a clean
environment to the heads and disks.
6.4 Head Positioning Mechanism
The read/write heads are supported by a mechanism coupled to the
voice coil actuator.
6.5 Read/Write Heads and Disks
Data is recorded on two 65mm diameter disk through four miniature
thin film heads.
6.6 Error Correction
The CP2064 uses a Reed-Solomoncode to perform error detection
and corretion. The error correction is capable of correcting
one error burst with a maximum of 22 bits per 512 byte block.
6.7 Customer Options
The CP2064 can operate either as a master (C Drive) or a slave
(D Drive) depending on the state of jumpers and the setting
of a feature bit. When the feature Byte, bit 4, is active (1),
and E1 is jumpered, the drive will assume the role of master.
When E1 is open the drive will assume the role as a slave
(D drive.
7.0 Interface Connector
The CP2064 has a 44 pin right angle interface/power connector
mounted on the PCB. The recommended mating connector part number
from Elco Corporation for the Flat Ribbon type is
20-8394-2050-02101S. The maximum cable length is two feet.
7.1 Diagnostic Routines
The microprocessor performs diagnostics upon application of power.
If an error is detected, the CP2064 will not come ready.
8.0 Recommended Mounting Configuration
The CP2064 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 design features which allow greater shock tolerance are the
use of rugged heads and media, a dedicated landing zone, closed
loop servo positioning and specially designed motor and actuator
assemblies.
Four (8) mounting points are provided to the customer. The drive
is mounted from the bottom using 4-40 screws 0.19 inch max insertion.
Side mounting is also available using 2.5mm x .5 x .19 screws.
The system integrator should allow ventilation to the drive to ensure
reliable drive operation over the operating temperature range. The
drive may be mounted in any attitude.
For additional vibration isolation, an external suspension system may
be used.
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 below.
9.2 Pin Descriptions
Signal Name Dir Pin Description
-RESET 0 1 Reset signal from the Host system which
is active low during power up and inactive
thereafter.
GND 0 2, 19 Ground between the drive and
22, 24 Host.
26, 30
40, 43
+DATA 0-15 I/O 3-18 16 bit bi-directional data bus between
the host and the drive. In AT mode, the
lower 8 bits, HD0-HD7, are used for register
& ECC access. All 16 bits are used for data
transfers. In XT mode, only the lower 8
bits are used. These are tri-state lines
with 10mA drive capability.
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 0 21,28 Reserved
29,44
-IOW 0 23 Write strobe, the rising edge of which
clocks data from the host data bus into
a register or the data register of the drive.
-IOR 0 25 Read strobe, which when low enables
data from a register or the data register
of the drive onto the host data bus. The
rising edge of IOR latches data from the
drive at the host.
IOCHRDY 0 27 No Used
+IRQ I 31 Interrupt to the Host system. In AT mode
this signal is 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 dive CPU.
IRQ is reset to zero by a Host read of the
Status register or a write to the command
register. In XT mode, this signal is
enabled when the IRQ enable bit is set
and the drive has completion status
available for the host. This signal is a
tristate line with 10mA drive capacity.
-I016 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-state line with 20 mA drive capacity.
(AT mode only).
-PDIAG I/O 34 At POR -PDIAG will be activated by the
slave within 1 ms. If the master doesn't
see -PDIAG active after 4 ms it will
assume no slave is present. -PDIAG will
remain active until the slave is ready to go
not busy or 14.0 seconds on a power on
reset. The master will wait 14.5 seconds
or until the slave deactivates -PDIAG on
power on reset before it goes not busy.
The salve will de-activate -PDIAG and go
not busy, if it is not ready after the 14.0
seconds. Neither drive will set ready or
seek complete until they have reached full
spin speed and are ready to read/write.
+A0,A1,A2 0 35,33, Bit binary coded address used to select
36 the individual registers in the drive.
-CS0 0 37 Chip select decoded from the host
address bus. Used to select some of the
Host accessible registers.
Note: This signal should be disabled by
the Host when data transfers are in
progress.
-CS1 0 38 Chip select decoded from the Host
address bus. Used to select three of the
registers in the Task File. AT mode only.
-ACTIVE I 39 Signal from the drive used to drive an
active LED whenever the disk is being
accessed.
+5V (Logic) 0 41 5 volt +/- 5% supply to drive circuitry.
+5V (Motor) 0 42 5 volt +/- 5% supply to drive motors.
^Z