
H D   6 6 2 / 1 2    OLIVETTI
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/HH              Cylinders     612|     |     |
Capacity form/unform    20/   25 MB        Heads           4|     |     |
Seek time   / track  85.0/18.0 ms          Sector/track   32|     |     |
Controller           MFM / ST506           Precompensation
Cache/Buffer               KB              Landing Zone
Data transfer rate    0.625 MB/S int       Bytes/Sector      256
                      0.625 MB/S ext
Recording method     MFM                            operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         5 50    |    -10 60
Power: sleep              W     Humidity     %        10 80    |     10 95
       standby            W     Altitude    km                 |
       idle               W     Shock        g                 |
       seek               W     Rotation   RPM      3573
       read/write         W     Acoustic   dBA
       spin-up            W     ECC        Bit
                                MTBF         h      12000
                                Warranty Month
Lift/Lock/Park     YES          Certificates                                  

**********************************************************************
                      J   U   M   P   E   R   S
**********************************************************************
OLIVETTI HD662  PRELIMINARY DRIVE SPECIFICATIONS 11/84

 Jumper Setting
 ==============

 Drive Selection
 ---------------
 When the drive select line is activated, drive selection will take
 place. Only the drive with line active will respond to input lines or
 gate output lines.


  +---------+
  | x . . . | ON
  | . x x x | OFF
 DS-1-2-3-4-+
    +-+-+-+
      |
      +-------- Drive Select (set only one bit to ON)


 Physical Interface
 ------------------
 The electrical interface between the drive and the host system is
 comprised of four connectors:

 01J - provides control signals for the device (34 pins)

 02J - provides the radial connection for read/write data signals
       (20 pins)

 03J - provides the dc power (4 pins)


 Interface Lines and pin assignment
 ----------------------------------
 Pin 1 +12V DC
 Pin 2 +12V Return
 Pin 3 +5V Return
 Pin 4 +5 V DC


 01J Connector Pin Assignment
 ----------------------------
 +------------+------------+---------------------------------+
 |GND RTN PIN | Signal Pin | Signal Name                     |
 +------------+------------+---------------------------------+
 |     1      |     2      | RESERVED                        |
 +------------+------------+---------------------------------+
 |     3      |     4      | RESERVED                        |
 +------------+------------+---------------------------------+
 |     5      |     6      | WRAGA - WRITE GATE              |
 +------------+------------+---------------------------------+
 |     7      |     8      | OCCUO - SEEK COMPLETE           |
 +------------+------------+---------------------------------+
 |     9      |    10      | POZEN - TRACK 000               |
 +------------+------------+---------------------------------+
 |    11      |    12      | WRIFN - WRITE FAULT             |
 +------------+------------+---------------------------------+
 |    13      |    14      | HEAD1 - HEAD SELECT 2*          |
 +------------+------------+---------------------------------+
 |    15      |    16      | MACAN - RESERVED (TO 02J PIN 7) |
 +------------+------------+---------------------------------+
 |    17      |    18      | HEAD2 - HEAD SELECT 2(1)        |
 +------------+------------+---------------------------------+
 |    19      |    20      | GIRON - INDEX                   |
 +------------+------------+---------------------------------+
 |    21      |    22      | MADIN - READY                   |
 +------------+------------+---------------------------------+
 |    23      |    24      | STEPN - STEP                    |
 +------------+------------+---------------------------------+
 |    25      |    26      | SEL 1 - DRIVE SELECT 1          |
 +------------+------------+---------------------------------+
 |    27      |    28      | SEL 2 - DRIVE SELECT 2          |
 +------------+------------+---------------------------------+
 |    29      |    30      | SEL 3 - DRIVE SELECT 3          |
 +------------+------------+---------------------------------+
 |    31      |    32      | SEL 4 - DRIVE SELECT 5          |
 +------------+------------+---------------------------------+
 |    33      |    34      | AVANN - DIRECTION INN           |
 +------------+------------+---------------------------------+


 02J Connector Pin Assignment
 ----------------------------
 +------------+----------+-----------------------------------+
 |GND RTN PIN |SIGNAL PIN| SIGNAL NAME                       |
 +------------+----------+-----------------------------------+
 |     2      |   1      | UNSEA  - DRIVE SELECTED           |
 +------------+----------+-----------------------------------+
 |     4      |   3      | RISE1  - RESERVED                 |
 +------------+----------+-----------------------------------+
 |     6      |   5      | RISE2  - RESERVED                 |
 +------------+----------+-----------------------------------+
 |     8      |   7      | MACAN  - RESERVED (TO 01J PIN 16) |
 +------------+----------+-----------------------------------+
 |    10      |   9      | RISE3  - RESERVED                 |
 +------------+----------+-----------------------------------+
 |    12      |  11      | GROUND - GND                      |
 +------------+----------+-----------------------------------+
 |            |  13      | WRIDO  - +MFM WRITE DATA          |
 +------------+----------+-----------------------------------+
 |            |  14      | WRIDN  - -MFM WRITE DATA          |
 +------------+----------+-----------------------------------+
 |    16      |  15      | GROUND - GND                      |
 +------------+----------+-----------------------------------+
 |            |  17      | READO  - +MFM READ DATA           |
 +------------+----------+-----------------------------------+
 |            |  18      | READN  - -MFM READ DATA           |
 +------------+----------+-----------------------------------+
 |    20      |  19      | GROUND - GND                      |
 +------------+----------+-----------------------------------+



**********************************************************************
                      I   N   S   T   A   L   L
**********************************************************************
OLIVETTI HD662  PRELIMINARY SPECIFICATIONS  11/1984

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

 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
      UNACCEPTABLE!                                UNACCEPTABLE!
      Never install PC board on the Top!


 Positioning Mechanism
 ---------------------
 The stepper motor positions the read/write heads.

 The heads are mounted on a carriage driven by a stepper motor and
 a capstan wound by a metal band. The winding and unwinding of the
 metal band determine the positioning.


 Drive Mechanism
 ---------------
 A brushless DC spindle motor speeds up the disk until they reach 3573
 revolutions per minute. Such speed is controlled by a locked-loop
 circuit that has as reference a quartz frequency.


 Heads and Disks
 ---------------
 The read/write heads are of the Winchester type and fly at a height
 of 0.4  m from the disk surface. The disks are made of aluminium
 and the surface is coated with a sheet of ferrous oxide specially
 lubricated to permit contact of the head with the surface during
 start and stop phases.


 Filters
 -------
 The drive has two filters:

  An absolute filter mounted inside the cover to filter the air flow
  generated by the disks rotation speed.

  A compensation filter mounted on the cover to equalize pressure with
  ambient air.


 Connection Mode
 ---------------
 The drives are connected in daisy chain on control signals and
 radially on read/write signals. The maximum number of connected
 drives is 4. The maximum lergth of the daisy connection cable is 6
 meters (18 feet). Radial configuration cables must be the same
 length as in daisy chain. In either case, the maximum length should
 be no more than 6 meters.

 There is also the possibility of a radial connection on the command
 channel. When the jumper is set, all signal outputs are activated,
 even when the unit is not selected.


  XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
  XXXXController/Data SeparatorXXXXXXXXXXXXX
  XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
   X  X  X  X  X
   |  |  |  |  |
   |  |  |  |  |  +---------+
   |  |  |  |  +--X 02J     |
   |  |  |  |     |      03JX-----Power Supply Unit
   +--+--+--+-----X         |
   +--+--+--+-----X 01J     |Drive 1
   |  |  |  |     +---------+
   |  |  |  |
   |  |  |  |     +---------+
   |  |  |  +-----X 02J     |
   |  |  |        |      03JX-----Power Supply Unit
   +--+--+--------X         |
   +--+--+--------X 01J     |Drive 2
   |  |  |        +---------+
   |  |  |
   |  |  |        +---------+
   |  |  +--------X 02J     |
   |  |           |      03JX-----Power Supply Unit
   +--+-----------X         |
   +--+-----------X 01J     |Drive 3
   |  |           +---------+
   |  |
   |  |           +---------+
   |  +-----------X 02J     |
   |              |      03JX-----Power Supply Unit
   +--------------X         |
                  X 01J     |Drive 4
                  +---------+

 Control Lines
 -------------
 All the following lines are present in the 01J connector. The
 electrical specifications for these lines are as follows:

 Low Level = 0.0 VDC to +0.4 VDC  -48mA
 High Level = +2.5 VDC to +5.25VDC +250  A


 Drive Select Lines
 ------------------
 These lines when at a low level, permit the selection of the drives.
 When selected, only one of these lines will be at a low level. The
 peripheral remains selected when this line is kept at a low level.

 No more than one line must be at low level.

 The selection of the drive is made via dip switches mounted on the
 PCB.

 On a daisy chain configuration the resistors must be mounted only
 on the last drive.


 Cables
 ------
 Connection with the 01J and 02J has to be made with a Flat Ribbon
 cable or a Twisted Pair cable with a 105 ohm impedance.

 Connection with the 03J has to be made with a Twisted Pair cable.



**********************************************************************
                      F   E   A   T   U   R   E  S
**********************************************************************
OLIVETTI HD662  PRELIMINARY SPECIFICATIONS 11/1984

 General Description
 -------------------
 The HD 662 is a random access magnetic storage unit with 2, 5.25 inch
 diameter, non-removable disks.

 The 4- head unit, mounted on a carriage driven by a stepper motor
 with a band actuator, moves on disk surfaces and stops in any of the
 612 cylinders. An appropriate area is used for the shipping zone.

 The disks are mounted on a spindle fitted directly on the DC
 brushless motor shaft.

 The disks, heads and carriage are contained in a sealed chamber. This
 chamber is made of a die-cast aluminium cup-shaped baseplate,
 specially treated to prevent contamination, and its cover. Within
 this chamber, the air blow through a class 100 absolute filter
 recirculates in a contaminate-free environment.

 On the outer side of the baseplate are mounted:

 - the stepper motor
 - the spindle motor
 - the electronics is composed of: stepper motor drive circuits,
   actuation, data channel, spindle motor speed control, and a
   microprocessor to control the main functions.

 The logical interface is industry standard and is composed of two
 connectors. A standard connector is also used for DC voltage
 requirements.

 The physical interface is compatible with all 5.25 inch Winchester
 drives with stepper motor actuator that use industry standard inter-
 face.


 Control lines from drive to controller
 --------------------------------------
 These lines are transmitted by a line driver with an open collector.
 On the controller they have to be received by a Schmitt trigger
 (74LS14 or equivalent).

 Line impedance is terminated with a 220-330 ohm resistor pack.


 Control lines from controller to drive
 --------------------------------------
 The lines are received by the drive with a 74LS14 Schmitt trigger and
 the lines are terminated with a 220-330 ohm resistor pack.

 On the controller they have to be transmitted by an open collector
 75452-7438 or equivalent device.


