Tech Arsenal 1/Tech Arsenal (Arsenal Computer).ISO/tek-16/scp2034.txt

Text File | 1993-06-14 | 16KB | 550 lines

            CONNER PERIPHERALS



               CP2034

             Intelligent Disk Drive

            Product Manual

            Revision I

            October 1990


            3081 Zanker Rd.

        San Jose, Ca.    [phone]

    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 CP2034 is a high performance 2.5 inch low-profile (.69")
32.0 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 CP2034 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 CP2034.


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

    32.0 Mbytes Formatted

3.2    Physical Configuration

    Actuator Type            Rotory Voice-coil
    Number of Disks            1
    Number of Surfaces        2
    Number of Heads            2
    Servo                Embedded
    Tracks per Surface        823
    Track Density            2100 TPI
    Formatted Track (Bytes)        19,456
    Bytes per Block            512
    Blocks per Drive        62,548
    Sectors per Track        38

3.3    Performance

    Seek Times
        Track to Track        5.0 ms
        Average            19.0 ms
        Maximum            40.0
    Rotation Speed            3433 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        XT/AT
        Recording Method    2/7 RLL
        Recording Density    33,233
        Flux Density        22,155

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 CP2034 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 one 65mm diameter disk through two miniature
thin film heads.

6.6  Error Correction

The CP2034 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 CP2034 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 CP2034 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; and for the Solder Tail type it is Vertical
PCB 20-8390-2050-00101. 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 CP2024 will not come ready.

8.0  Recommended Mounting Configuration

The CP2034 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.