Tech Arsenal 1/Tech Arsenal (Arsenal Computer).ISO/tek-16/cp30084.txt

Text File | 1993-06-14 | 22KB | 663 lines

             Conner Peripherals, Inc.


                     CP30084
               Intelligent Disk Drive

                  Product Manual






                    Revision I

                  February, 1992







                 3081 Zanker Road
             San Jose, CA   95134-2128
                  [phone]
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.

c 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)
      3.6 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 Reas/Write Heads and Disks
      5.6 Error Correction
      5.7 Customer Options


6.0  Power Connectors

      6.1 Task File Interface Connector
      6.2 Signal Levels
      6.3 Signal Conventions
      6.4 Pin Descriptions

7.0  Recommended Mounting Configuration




               1.0  Scope of Manual

This manual describes the key features,
specification summary, physical characteristics,
environmental characteristics, functional
description, electrical interface, recommended
mounting configuration, timing requirements, host
address decoding, command description, operations
description, and error reporting for Conner
Peripherals CP30084 drives.




                 2.0  Key Features

The CP30084 is a high performance 3.5 inch low-
profile (1") 84.1 megabyte (formatted) disk drive
with 19 ms average seek time that is designed to
operate on an IBM PC/ATr  or equivalent in
translate mode. The drive features low power
requirements and high shock resistance, enabling
battery operation in portable environments.

Because the drive contains the Task File within
its control logic, it requires a simplified
adapter board to operate.

  o    Low power requirements enabling battery
       operation in portable environments.

  o    High performance rotary voice coil
       actuator with embedded servo system.

  o    1,7 run length limited code.

  o    High shock resistance

  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    512 byte block size .

  o    Emulates Task File with support for for
       additional commands.

  o    Up to two drives may be daisy-chained on
       the AT interface.

  o    64K Look Ahead buffer



            3.0  Specification Summary

3.1  Capacity


Formatted Mbytes  84.1

3.2  Physical Configuration

Head Type     MIG
Disk Type     Thin film
Actuator Type     Rotary Voice-coil
Number of Disks      2
Data Surfaces        4
Data Heads            4
Servo              Embedded
Tracks per Surface       1053
Track Density (TPI)     1400
Formatted Track
Capacity (bytes)     19,968
Bytes per Block      512
Blocks per Drive     164,268
Sectors per Track:    39

The physical parameters of the drive are 1053
cylinders, 4 heads, and 39 sectors per
track. At power up, the CP30084 will default to
its native translate mode which is 526 cylinders,
8 heads and 39 sectors.

3.3 Performance

    Seek:
        Track to Track          8ms
        Average              <19.0ms
        Maximum              35.0ms

        Rotation Speed (+0.1%)       3400 RPM

Data Transfer Rate (to/from Media)      1.5
Mbyte/second

Start Time(Power Up)

                               typical: 15 seconds
                               maximum: 20 seconds

Stop Time (Power Down)         typical: 15 seconds
                               maximum: 20 seconds

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 Task File (AT)
Recording Method  1,7 RLL code
Recording Density (ID) 33,184 bits per inch
Flux Density (ID) 24,888 flux reversals per
inch

3.5 Power Requirements (Typical)

         +12V DC ± 5% +5V DC ± 5% Power
Read/Write Mode   200 ma       280 ma     3.8 W
Seek Mode       260 ma       150 ma     3.9 W
Idle Mode       175 ma       75 ma      2.8 W
Standby Mode       10 ma        75 ma      0.5 W
Sleep Mode       10 ma        380 ma     0.5 W
Spin-up Mode       1100 ma      380 ma     N/A

Read/Write mode occurs when data is being read
from or written to the disk.

Seek Mode occurs while the actuator 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,
actuator parked and all electronics except
interface control is in sleep state.  STANDBY MODE
will occur after a programmable time-out after the
last host access occurs.  Drive ready and seek
complete status exist.  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 host issues the SLEEP
command to the drive.  SLEEP MODE is the same as
STANDBY MODE except that interface control is also
powered down.  To exit the SLEEP MODE, the Host
Reset line on the interface must be asserted.  The
SRST bit in the Digital Output Register is useful
for this purpose (see section 9.12).

Maximum noise allowed (DC to 1 MHZ, with
equivalent resistive load):

Source +12V DC +5V DC
Noise 1% 2%

Spin up Mode current draw is for 7 seconds
maximum.

3.6 Physical Characteristics


Outline Dimensions ± .010
1.00" max. x 4.00" x 5.75"
Weight 1.3 pounds

        4.0  Environmental Characteristics

4.1  Temperature

    Operating         5°C to 55°C
    Non-operating         -40°C to 60°C
    Thermal Gradient    20°C per hour maximum

4.2  Humidity

    Operating       8% to 80% non-condensing
    Non-operating       8% to 80% non-condensing
    Maximum Wet Bulb       26°C

4.3  Altitude (relative to sea level)

    Operating       -200 to 10,000 feet
    Non-operating (max)  40,000 feet

4.4  Reliability and Maintenance

     MTBF           100,000 hours (POH)1
     MTTR           10 minutes typical
     Preventive Maintenance    None
     Component Design Life    5 years
     Data Reliablity    <1 non-recoverable error in
    1012 bits read

4.5  Shock and Vibration

Shock   1/2 sine pulse, 11 msecond duration
Vibration   Swept sine, 1 octave per minute
Non-operating shock   75Gs
Non-operating vibration
    5-62 Hz (1.2 oct/min)   0.020ö double
amplitude
    63-500 Hz (1/2 oct/min)   4 Gs peak
Operating Shock    5 Gs (without non-recoverable
errors)
Operating Vibration
    5-22 Hz
  .025 inch displacement (double amplitude)
    23-500 Hz   .5 Gs (without non-recoverable
error)

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:

Frequency Field Intensity:
    0 to 700Khz 6 gauss maximum
    700Khz to 1.5Mhz 1 gauss maximum

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 and
     CSA 22.2 #950, Safety of Information
      Technology 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

   o TUV Essen and
     TUV Rheinland.

          5.0  Functional Characteristics

The drives contain 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 read
pre-amplification and write data circuitry. The
read/write heads are supported by a mechanism
coupled to the voice coil actuator.

The single circuit card provides the remaining
microprocessor-controlled 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 off the data tracks.

5.2  Drive Mechanism

A brushless DC direct drive motor rotates the
spindle.  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.

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 read/write heads are supported by a
mechanism coupled to the voice coil actuator in
the CP30084.

5.5  Read/Write Heads and Disks

Data are recorded on two 95mm diameter disks
through four miniature metal-in-gap heads.

5.6  Error  Correction

The drive performs internal error correction.
The error correction polynomial is capable of
correcting one error burst with a maximum of 8
bits in each half of a 512 byte block.

5.7  Customer  Options

The drive has one set of jumpers labeled C/D, DSP,
E1.

   C/D - Jumpered addresses drive as drive C.
         Not jumpered addressed drive as drive D.

   DSP - Drive slave present.
         Not jumpered selects single drive only.

   E1  - Not used.

6.0  Power Connectors

The drive haves a 4 pin DC power connector mounted
on the PCB.  The recommended mating connector is
AMP part number 1-480424-0 utilizing AMP pins,
part number 350078-4 or equivalent.  DC power may
also be supplied to the drive in some interfaces
through a 3 pin connector.  The recommended mating
connector is Molex part number 39-01-0033
utilizing Molex pins, part number 39-00-0031 or
equivalent.

6.1  Task File Interface Connector

A 40 pin Task File Interface connector mounted on
the printed circuit board.  The recommended mating
connector is Molex part number 10-91-2401 or
equivalent.  Two drives may be daisy chained
together at this connector, and the maximum cable
length is two feet.

6.2  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.

6.3  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".

6.4  Pin Descriptions

The following table describes all of the pins on
the Task File Interface.

Signal Name    Dir  Pin      Description

- HOST RESET    O    01      Reset signal from the Host
                 which is active low during
                 power up and inactive
                 thereafter.

GND             O    02      Ground between drive and Host.

+HOST DATA     I/O  3-18     16-bit bi-directional data
                  bus 0-16 between the Host
                  and the drive. The lower 8 bits,
                  HD0 - HD7, are used for register
                  and 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 drive and 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        O    21

GND             O    22      Ground between drive and 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 Task File register onto the
                 Host data bus HD0 through 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

+HOST ALE       O    28      Host Address Latch Enable.  A signal
                 used to qualify the address lines. This
                 signal is presently not used .

GND             O    30      Ground between drive and host.

+HOST IRQ14     I    31      Interrupt to the Host system, enabled
                 only whenthe 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 is 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 I/O16     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 a
                 tri-state line with 24 mA drive capacity.

- HOST PDIAG    I    34      Passed diagnostic. Output by the drive if
                 it is strapped in the slave mode (C/D not
                 jumpered).Input to the drive if it is
                 strapped in the master mode (C/D
                 jumpered).  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,       O   35,      Binary coded address used to select
     A1, A2         33,36    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 activity LED 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.


      7.0  Recommended Mounting Configuration

This 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.

Ten base mounting points are provided to the
customer. The drive is mounted using 6-32 x 1/8"
maximum insertion for the sides, and .20"
insertion for the bottom.  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.