
1 5 3 8    MICROPOLIS
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders    1669|     |     |
Capacity form/unform   910/ 1043 MB        Heads          15|     |     |
Seek time   / track  14.5/ 4.0 ms          Sector/track   71|     |     |
Controller           ESDI                  Precompensation
Cache/Buffer               KB              Landing Zone
Data transfer rate    2.875 MB/S int       Bytes/Sector      512
                            MB/S ext
Recording method     RLL                            operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C        10 50    |    -40 65
Power: sleep              W     Humidity     %        10 90    |     10 90
       standby       19.0 W     Altitude    km    -0.061  3.048| -0.305 15.240
       idle               W     Shock        g         8       |     20
       seek               W     Rotation   RPM      3600
       read/write    24.0 W     Acoustic   dBA        40
       spin-up            W     ECC        Bit
                                MTBF         h     150000
                                Warranty Month        60
Lift/Lock/Park     YES          Certificates                                  

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                        L   A   Y   O   U   T
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MICROPL. 1538  PRODUCT DESCRIPTION 110670 REV. A

  +---------------------------------------------------------+
  |                                                         |XX J12
  |                                                         |
  |   COMPONENT SIDE                                        |XX
  |                                                         |XX
  |                                                         |XX J2
  |                                                +-+      |XX
  |                                                | |      |  1
  |                                             RN11 |      |XX
  |                                                +-+      |XX
  |                             Drive Adress    1-+         |XX J1
  |                                             | |         |XX
  |                             Spindle Control | |         |XX
  |                             Hard Sector     | |         |XX
  |                             Reserved        +-W1        |XX
  |                                                         |  1
  |                                          W28+           |XX J3
  |                                            ++           |XX Power
  +---------------------------------------------------------+  1






     +--------------------------------------+
     |       +--+J4 HDA Ground              |
     |       +--+                           |
     |                                      |
     |  +--+J5 Frame Ground                 |
     |  +--+                                |
     |      J2             J1           J3  |
     |  ........... XXXXXXXXXXXXXXXX XXXXXXX|
     +-----Data---1----Control-----1-Power-1+



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                      J   U   M   P   E   R   S
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MICROPL. 1538  PRODUCT DESCRIPTION 110670 REV. A

 Jumper setting
 ==============

 x = Factory default configuration


 Drive Address/Spindle Control/Hard Sector Configuration Jumper Block
 --------------------------------------------------------------------
       1-----+
       | o o |DA3-+
       | o o |DA2-+-- Drive Address
       | o o |DA1-+
       | o o |W5----- Spindle Control
       | o o |W4--+
       | o o |W3--+-- Hard Sector Configuration
       | o o |W2--+
       | o o |W1----- RESERVED (No jumper)
       +-----+



 Drive Select  DA3/DA2/DA1
 -------------------------
  +--------+------------------------+
  |Drive   |    Select Jumpers      |
  |Address |   DA3    DA2    DA1    |
  +--------+------------------------+
  |x 1     |   OPEN   OPEN   CLOSED |
  |  2     |   OPEN   CLOSED OPEN   |
  |  3     |   OPEN   CLOSED CLOSED |
  |  4     |   CLOSED OPEN   OPEN   |
  |  5     |   CLOSED OPEN   CLOSED |
  |  6     |   CLOSED CLOSED OPEN   |
  |  7     |   CLOSED CLOSED CLOSED |
  +--------+------------------------+

 Drive Address 0 is used as a "deselect" (i.e., no drive is selected).

 The three Drive Select interface lines are decoded to select the
 correspondingly addressed drive to the host controller/formatter. In
 multiple-drive systems, each drive must have its own unique address.

 Terminator Pack RN11 provides proper termination for the interface
 lines. When daisy-chaining multiple 1538 drives, the terminator is
 installed only in the last drive on the daisy chain.


 Sectoring Options
 -----------------
 The Sector/Address Mark Found signal is used to transmit sector
 pulsed to the host controller. Sector pulses are derived from the
 servo disk. The number of sector pulses generated is equal to:
           +      +
           |31,248|  Where 31,248 = byte clock derived from servo
        INT|------|                 disk
           |   n  |           INT = integer part of
           +      +             n = the number of unformatted bytes/
                                    sector (82 minimum)


 W2/W3/W4  Hard Sector Configuration
 -----------------------------------
     +--------+---------------------------+------------------------+
     |Sectors |     Bytes/Sector          |    Jumpers             |
     |        | Formatted   Unformatted   |  W4      W3      W2    |
     +--------+---------------------------+------------------------+
     |   68   |    520          612       |  OPEN    OPEN    OPEN  |
     | x 71   |    512          582       |  OPEN    OPEN    CLOSED|
     |   38   |   1024         1096       |  OPEN    CLOSED  OPEN  |
     |   18   |   2244         2314       |  OPEN    CLOSED  CLOSED|
     |   10   |   4096         4166       |  CLOSED  OPEN    OPEN  |
     |   64   |    580          650       |  CLOSED  OPEN    CLOSED|
     |  121   |    272          342       |  CLOSED  CLOSED  OPEN  |
     |    1   |  41594        41664       |  CLOSED  CLOSED  CLOSED|
     +--------+---------------------------+------------------------+

 The number of bytes/sector may be specified using the Set Bytes Per
 Sector command or by selecting a default sector configuration with
 option jumpers W2, W3, and W4.


 W5  Spindle Control Option
 --------------------------
     CLOSED  The drive must wait for a Start Spindle command to start
             the spindle motor.
   x OPEN    The drive automatically starts the spindle motor at
             power-on.


 W28  Frame Ground Option
 ------------------------
     CLOSED  Frame ground is connected to logic ground.
   x OPEN    Frame ground is not connected to logic ground.



 J3   DC Power and pin connector assignments
 -------------------------------------------
 -------------------+
 --+  +-----J3-----+|  pin 1    +12 VDC
  1|  | 4  3  2  1 ||  pin 2    +12 Volts Return
  -+  +------------+|  pin 3    + 5 Volts Return
  ------------------+  pin 4    + 5 VDC


 J12 RESERVED!



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                      I   N   S   T   A   L   L
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MICROPL. 1538  PRODUCT DESCRIPTION 110670 REV. A

 Notes on installation
 =====================

 Recomended Drive mounting
 -------------------------

     horizontally             vertically
   +-----------------+   +--+             +--+ +------------------+
   |                 |   |  +-----+ +-----+  | |                  | x
   |                 |   |  |     | |     |  | x+----------------+x
 +-+-----------------+-+ |  |     | |     |  | ||x              x||
 +---------------------+ |  |     | |     |  | ||  x          x  ||
                         |  |     | |     |  | ||    x      x    ||
      x           x      |  |     | |     |  | ||      x  x      ||
 +------x------x-------+ |  +-----+ +-----+  | ||       xx       ||
 +-+------x--x-------+-+ +--+             +--+ ||     x    x     ||
   |       xx        |                         ||   x        x   ||
   |     x    x      |                         || x            x ||
   +---x--------x----+                         |x                x|
     x            x                           x++----------------++x


 Dimensions and Mounting
 -----------------------
 The 1538 drive uses industry-standard mounting for 5 -inch half-
 height Winchester disk drives.

 Recommended orientation is vertical on either side, or horizontal
 with the Device Electronics board down; other mounting orientations
 may be used provided the ambient air temperature around the drive is
 kept at or below 50*C (122*F).

 The term "ambient" becomes imprecise when referencing a drive in a
 system, since it is difficult to determine where the air temperature
 should be measured. To help resolve this confusion, Micropolis
 specifies that the maximum HDA casting temperature (regardless of the
 air temperature around the drive) is 60*C (140*F). Not exceeding this
 temperature will ensure that the head-to-media interface never exceed
 its temperature limit.

 Inasmuch as the drive frame acts as a heat sink to dissipate heat
 from the unit, the enclosure and mounting structure should be
 designed to allow natural convection of heat around the HDA and outer
 frame. If the enclosure is small or natural convetion is limited,
 a fan may be required.


 Mounting Screws
 ---------------
 2 per side 6-32 UNC-2B x 0.156 max deep.
 4 on bottom 6-32 UNC-2B x 0.20 max deep

 Caution: To avoid restricting HDA sway space, the mounting screws
 must not penetrate the outer surface of the side mounting holes by
 more than 0.156 inches or the bottom mounting holes by more than
 0.20 inches. Screws taht are too long may short to PCBA components
 and/or prevent proper operation of the shock mount system.


 Control Signal Connector J1
 ---------------------------
 J1 is a 34-pin board-edge connector. The signals on this connector
 control the drive and transfer drive status to the host controller.

 Recommended Cable: 3M Scotchflex 3365/34
 Mating Connector:  AMP 88373-3 (key slot between pins 4 and 6)


 Data Transfer Connector J2
 --------------------------
 J2 is a 20-pin board-edge connector containing  read or write data
 signals.

 Recommended Cable: 3M Scotchflex 3365/20
 Mating Connector:  AMP 88373-6 (key slot between pins 4 and 6)


 DC Power Connector J3
 ---------------------
 J3 is a 4-pin, keyed AMP MATE-N-LOK Connector. This connector
 supplies DC power (+5V and +12V) to the drive.

 Mating Connector: AMP 1-480424-0
             Pins: AMP 350078-4

 Suggested Wire Size: 18 AWG


 Ground Connectors J4/J5
 -----------------------
 3/16-inch spade lugs J4 and J5 are provided for grounding; system
 characteristics determine the proper ground connection.

 Mating Connector: AMP 60972-2 or equivalent.


 Daisy-Chaining the 1538 Drive
 ------------------------------

   +-HOST-------+                  +---------------+
   | CONTROLLER +--CONTROL---o-----+ J1   Drive #1 |
   |            |  +---------+-----+ J2            |
   |            |  |         |  +--+ J3  J4/J5     |
   |            |  |         |  |  +-------+-------+
   |            |  |         |  |          +-------------+
   |            |  |         |  |  +---------------+     |
   |            |  |         o--+--+ J1   Drive #2 |     |
   |            |  |  +------+--+--+ J2            |     |
   |            |  |  |      |  o--+ J3  J4/J5     |     |
   |            |  |  |      |  |  +-------+-------+     |
   |            |  |  |      |  |          +-------------o
   |            |  |  |      |  |  +---------------+     |
   |            |  |  |      o--+--+ J1   Drive #3 |     |
   |            |  |  |   +--+--+--+ J2            |     |
   |            |  |  |   |  |  o--+ J3  J4/J5     |     |
   |            |  |  |   |  |  |  +-------+-------+     |
   |            +--+  |   |  |  |          +-------------o
   |      DATA  +-----+   |  |  |  +---------------+     |
   |            +---------+  +--+--+ J1   Drive #4 |     |
   |            +---------------+--+ J2       +----+     |
   |            |               o--+ J3  J4/J5|RN11|     |
   +------------+               |  +-------+--+----+     |
                                |          |             |
       DC VOLTAGES -------------+          |             |
            GROUND ------------------------o-------------+

 Interface Terminator RN11 is installed ONLY in the last physical
 drive in the control chain.

 Connectors J4 and J5 are provided for grounding; system
 characteristics determine the proper ground connection.

 Up to seven disk drives may be connected to a single host controller/
 formatter. The control signals at J1 are transmitted via the
 standard, daisy-chain interconnection. The data signals at J2 are
 transmitted via radially connected data-transfer lines.


 Interface Electrical Characteristics
 ------------------------------------
 The signals at Control Signal Connector J1 control the drive and
 transfer drive status to the host controller. The signals control are
 low-true at the interface, high-true into drivers and out receivers,
 and have the following logic levels shown:

 True  = 0.0 VDC to 0.4 VDC @ I = -48 milliamps (maximum)
 False = 2.5 VDC to 5.25 VDC @ I = +250 microamps (open collector)

 All interface data transfer signals are differential in nature.

 Up to seven drives can be connected to one host controller/formatter.
 Drive Select 1, 2 and 3 carry the binary-coded addres of the drive to
 be selected. The address of the drive is set with driveselection
 jumpers DA1, DA2, and DA3 as a binary combination. When the address
 is decoded and the decoded value matches the value specified by the
 three drive-selection jumpers, that drive is enabled to receive
 commands and transmit status. Drive Select 1 is the least significant
 bit.


 Adjustments and Maintenance
 ---------------------------
 The 1538 drive requires no adjustments or periodic maintenance.
 Additionally, no mechanical adjustments are required to prepare the
 drives for handling or shipment.


 Field-Replaceable Components
 ----------------------------
 The concept of repair by replacement of complete functional
 components is utilized in the 1538 drive, resulting in an MTTR of
 less than 15 minutes.



**********************************************************************
                      F   E   A   T   U   R   E  S
**********************************************************************
MICROPL. 1538  PRODUCT DESCRIPTION 110670 REV. A

 Micropolis 1538 high-performance, 5 -inch Winchester Disk Drives
 provide OEMs with high-speed, high-capacity, random-access storage
 with a built-in intelligent controller.

 The drives are fully compatible with the Serial mode of the
 Enhanced Small Device Interface (ESDI) standard and are designed to
 meet the needs of diverse applications environments.


 Media Defects
 -------------
 Media defects are physical characteristics of the media which result
 in repetitive read errors when a functional drive is operated within
 specified operating conditions.

 At the time of manufacture, a media test system evaluates every
 drive and identifies each media defect location. The defects are
 logged on a label affixed to the drive. The defective areas are
 identified by head (HD) address, cylinder (CYL) address, and number
 of Bytes from Index (BFI).

 In addition to listing the defects on the label and the printout, the
 defects are also mapped in the drive. The defect list is written for
 each data surface. The list is written on the corresponding surface
 in Sector 0 at three cylinder locations:

 1) The maximum cylinder (1668).
 2) The maximum cylinder minus 8 (1660).
 3) A special cylinder which is accessed as "Cylinder 4095 (FFFh).

 NOTE: The cylinder at the address of 4095 is a drive-unique location.
 This is in compliance with the industry-standard ESDI specification.
 Do not attempt to write to Cylinder 4095.

 +-------------------------------------------------------------------+
 | Micropolis specifies that all 1538 disk drives shall no more than |
 | one defect per megabyte of unformatted capacity. Additionally,    |
 | Cylinder 0 and the cylinder at 4095 shall be defect-free at the   |
 | time of shipment.                                                 |
 +-------------------------------------------------------------------+



 Seek Time
 ---------

                                          | 1538   |
        ----------------------------------+--------+
        Track-to-Track         msec. typ. |   4    |
                       Average msec. typ. |  14.5  |
                               msec. max. |  33    |
        One-Third Stroke       msec. max. |  15.5  |
        Latency                msec. avg. |   8.33 |
                 Nominal       msec. max. |  16.67 |
        ----------------------------------+--------+


 Data Transfer Signals
 ---------------------
 All data-transfer lines between the drive and the host system are
 differential and may not be multiplexed.

 For pairs of balanced signals are used to transfer data: NRZ Write
 Data, NRZ Read Data, Write Clock, and Read/Reference Clock.


